The filtering mode of the oil filter

Filtration process: the porous permeable medium is used to filter out the insoluble substance in the oil solution to separate solid particles > 1 m. The paper fiber can absorb a small amount of water.
Electrostatic process: the electrostatic field force is used to make the non-soluble pollutants in the oil adsorbed on the dust collector in the electrostatic field to separate solid particles, sludge and < 1 m "soft particles".
Magnetic process: Separation of ferromagnetic particles by magnetic field force to absorb the ferromagnetic particles in the oil character.
Centrifugal oil filter:
By means of mechanical energy, the oil can move in a circular motion, and the radial acceleration generated can be used to separate larger solid particles, free water and a small amount of emulsified water from insoluble substances with different oil density.
Coalescing oil filter:
A mixture of two insoluble liquids is used to separate free water and a small amount of emulsified water based on the difference in the wetting (or affinity) of the two liquids to a multi-pore medium.
Vacuum oil filter:
By using the difference of saturated vapor pressure under negative pressure, the moisture and air in various forms in oil can be separated from other liquids or gases.
Adsorption: Separation of solid particles, free water and emulsified water from soluble and insoluble substances in oil by molecular adhesion.
Related products:
Vacuum Oil Filter For Industrial Lubricating Oil Dewatering
Why Use Centrifugal Oil Filter To Filter Edible Oil

Vacuum Brazing Machine For PCD Diamond Tools

Other related products:

Liquid Ring Vacuum Pump
Dry screw vacuum pump
Oil Diffusion Vacuum Pump

How to choose the filter precision of filter oil filter?

Concept of oil filter with filter element:
The filter element oil filter refers to the oil filter that filters mechanical impurities through the filter element. The common filter element oil filter includes transformer oil filter, lubricating oil filter, turbine oil filter, trolley type oil filter and other equipment. According to the different filter oil, there is a lock gap in the selected equipment.
Filter accuracy of oil filter with filter element:
The filtration precision of the oil filter core depends on the height of the filtration precision of the oil filter core installed. The conventional filtration precision of the oil filter core is 50 m, 20 m, 10 m, 5 m, 1 m and other specifications.
How to select the filtering accuracy of oil filter with filter element:
According to the different filter oil, filter core filtering accuracy choice has the lock difference, transformer oil generally adopts the lowest filtering precision 1 m, lubricating oil, hydraulic oil and other filtering precision 5 micron, gear oil filtering precision is generally low, usually use 10-20 m filter core filtering.
Related products:
What Should I Do If The Vacuum Oil Filter Leaks
Filter Replacement Of Vacuum Oil Filter

Vacuum Brazing Machine For PCD Diamond Tools

Other related products:

Liquid Ring Vacuum Pump
Dry screw vacuum pump
Oil Diffusion Vacuum Pump

Oil filter equipped with filter element

The oil filter is equipped with automatic detection function of filter element pollution degree
Only when we realize the function of transformer oil filter, can we apply it to real life correctly. The oil filter tells you to know that the transformer oil filter has super filtration and purification effect, which can extend the service life of transformer oil.
The first dehydration effect does not need to be emphasized again, because one of the biggest functions of the transformer oil filter itself is dehydration effect, and the other is degassing. Dingneng brand new transformer oil vacuum oil filter has multi-stage design, built-in secondary evaporation interlayer, and special vacuum packing, which can increase the contact area of oil film and quickly separate water and gas in oil.
In addition to dehydration and degassing, the transformer oil filter also has the function of removing impurities. The high β value precision filter material of the transformer oil vacuum oil filter adopts multi-stage filtration and step-by-step densification to remove the fine particles in the oil. In the process of filtration and purification, transformer oil filter is equipped with automatic detection function of filter element pollution degree due to its large filter element volume, large pollution capacity and long service life. In the process of using transformer oil filter, it is estimated that the processing personnel can clearly see this point. In addition, many functions of transformer oil filter are expected to be understood thoroughly only by those who really use it.
Related products:
Vacuum Oil Filter Of Operation Method
How Does Vacuum Oil Filter Make Oil Clean?

Vacuum Brazing Machine For PCD Diamond Tools

Other related products:

Liquid Ring Vacuum Pump
Dry screw vacuum pump
Oil Diffusion Vacuum Pump

General usage of plate and frame pressure oil filter equipment

Before operation, carefully clip the filter paper with well punched holes between each filter plate and filter frame. The quantity of each layer of filter paper is generally 2-3 pieces, depending on the filtration requirements and the quality of filter paper. When clamping the filter paper, make sure that the two oil holes on the filter paper and the oil holes on the filter plate filter frame are the same. Filter paper should be dried before use at a drying temperature of about 120℃. When using the used filter paper, the filter paper must be dried, and there should be no damage, pay attention to the filter residue side (dirty side) should be placed against the filter frame, not against the filter plate, so as not to filter residue in the process of washing down, contaminating the filtered oil. When the filter pressure is high and the filter paper is found to break, the filter cloth can be lined on the ground side of the filter plate to increase the strength of the filter paper.
After the filter paper is put in place, turn the handwheel to press the filter plate. When pressing the filter plate, only one person is allowed, and the press handle should not be lengthened for tightening, so as not to damage the equipment. Close the sampling valve. If there is a valve on the oil drain line, open the valve.
Switch on the motor power and make the oil filter work. The normal working pressure of the oil filter will change with the viscosity of the oil filtered and the resistance of the pipeline expelled. Generally, the initial pressure of filtration is low in the range of 0.05~ 0.mpa. With the increase of water absorbed by the filter residue and filter paper, the pressure will increase gradually.
In the process of oil filtration, the oil sample can be extracted by unscrewing the nozzle for sampling. After filtration, loosen the pressing device, take out the filter paper piece by piece, clean the filter paper and filter residue in the filter frame, replace the filter paper and clamp the pressure again, and cover the oil tank.
Related products:
Vacuum Oil Filter For Turbine Oil Of Installation And Test
Power Industry Preferred Oil Filter Equipment: Insulation Oil Vacuum Filter
Other related products:
Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Dry screw vacuum pump

Is the check valve a double pass valve?

Check valves are double-pass valves, meaning they have two openings in the body, one for fluid entry and one for fluid exit. Various types of check valves are available for a wide variety of applications. Check valves are usually part of common household items. Although they come in a variety of sizes and costs, check valves are usually very small, simple, or inexpensive. Check valves operate automatically, most of which are not controlled by human or any external control; As a result, most do not have any valve handle or stem. The main body (housing) of most check valves is made of plastic or metal. An important concept of check valves is the open pressure, which is the minimum differential pressure upstream between the inlet and outlet when the valve is in operation. Typically, check valves are designed for and can therefore specify specific opening pressures.
Type of check valve

Ball check valve
A ball check valve is a one-way valve wherein the shutoff member, the movable part, to block the flow, is a ball. In some ball check valves, the ball is spring-loaded to help keep it closed. For those without springs, reverse flow is required to move the ball toward the seat and seal. The inner surface of the main seat of the ball check valve is more or less conical to guide the ball into the seat and form a positive seal when reverse flow is stopped. Ball check valves are usually very small, simple and inexpensive. They are commonly used in liquid or gel micro pump dispensers, spray devices, some rubber balls for pumping air, manual air pumps and some other pumps, and refillable dispensing syringes. Although balls are usually made of metal, they can be made of other materials; In some special cases, it is made of a highly durable or inert material, such as sapphire. High-pressure HPLC pumps and similar applications typically use small inlet and outlet ball check valves with (artificial) ruby ball and sapphire seats [6] or ball and Ruby seat [7], hardness and chemical resistance. Over time, the check valve will eventually wear out or the seat will crack and need to be replaced. The valve is therefore replaceable, sometimes in a small plastic body fitted tightly into a metal fitting that can withstand high pressure and be screwed into the pump head. There are similar check valves in which the disc is not a ball but some other shape, such as a spring-actuated lift valve. Ball check valves should not be confused with ball valves, which are a different type of valve in which the ball ACTS as a controllable rotor to stop or guide the flow.

Swing check valve
Swing check valves or tilting disk check valves are one-way valves in which the disc, when movable, blocks flow and the hinge or pivot on the swing, either blocks reverse flow in the seat or leaves the seat to allow forward flow. The seat opening cross-section may be perpendicular to the center line between the two ports or at an Angle. Although swing check valves may be available in a variety of sizes, large check valves are usually swing check valves. Common problems caused by swing check valves are known as water hammers. This occurs when the swing check is closed and the flow stops abruptly, causing pressure fluctuations that cause high-speed shock waves to act on pipes and valves, putting a lot of pressure on the metal and vibration in the system. Undetected water hammer can damage pumps, valves and piping in the system. The baffle valve in flushing toilet mechanism is an example of this type of valve. The tank pressure to keep it closed was overcome by manually lifting the baffle. Then it stays open until the tank drains and the baffle falls due to gravity. Another variant of this mechanism is the disc for use in applications such as fire protection and fire life safety systems. Hinged doors remain open only in the direction of inflow. The disc usually also has a spring that keeps the gate closed when there is no forward pressure. Another example is the backwater valve (used in sanitary drainage systems), which prevents flooding caused by backflow of sewage. This risk most often occurs in sanitary and drainage systems connected to the combined sewerage and stormwater drainage systems. This can be caused by heavy rainfall, melting or flooding.

Lift check valve
A lift check valve is a one-way valve in which the disc, sometimes referred to as an elevator, can be lifted off its seat by a higher pressure of the inlet or upstream fluid to permit flow to the outlet or downstream side. The guide keeps the disc moving in a vertical line so that the valve can be reinstalled correctly at a later time. When the pressure is no longer high, gravity or higher downstream pressure will cause the disc to drop onto its seat, closing the valve to stop reverse flow. An in-line check valve is a check valve similar to a lift check valve. However, the valve usually has a spring that "rises" when there is pressure on the upstream side of the valve. The pressure required to overcome spring tension on the upstream side of the valve is called "open pressure". When the pressure through the valve is lower than the opening pressure, the spring will close the valve to prevent backflow during the process.

Related products:
High Vacuum Electric Butterfly Valves Are Used In Industrial Automation
Pneumatic High Vacuum Ball Valve For New Energy And Semiconductor Industry
Other related products:
Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Dry screw vacuum pump

Principle of pneumatic gate valve

Working principle of pneumatic gate valve
Introduction to pneumatic gate valve:
Pneumatic gate valve is equipped with pneumatic actuator and driven by compressed air to control the gate valve. The valve core is composed of wedge-shaped structure and parallel structure, which is suitable for emergency cut-off and discharge of gas and liquid transmission pipeline.
Working principle of pneumatic gate valve:
When using the air source to operate the gate valve, the small handle on the manual device must be pulled to the pneumatic position to make the opening and closing nut and screw rod open. When the compressed air enters from the upper pipeline of the cylinder, it pushes the piston and piston rod in the cylinder to move downward in a straight line. The piston rod is connected with the valve rod, and the valve rod is pushed downward to close the valve. When the compressed air enters from the lower pipe, the gas is pushed The piston and piston rod in the cylinder move upward, and at the same time drive the valve stem to move upward to open the valve. When there is no air source, screw rod and split nut can be used to open and close the valve. First, put the upper and lower intake pipes of the cylinder in the exhaust state, turn the small handle of the manual part in the manual position, so that the opening and closing nut and the screw rod are in normal meshing state. At this time, turn the large hand wheel of the manual part. When the hand wheel is turned clockwise, the valve is closed. When the hand wheel is turned counterclockwise, the valve is closed Open the valve.
When the air source enters from the upper intake port, the valve rod drives the valve plate to move downward and the valve closes. When the air source enters from the lower air inlet, the valve rod drives the valve plate to move upward and the valve opens.
Parameters of pneumatic gate valve:
Actuator: cylinder piston structure;
Optional accessories: manual device, filter, solenoid valve, buzzer, control box;
Main materials: nodular cast iron, cast steel, stainless steel; caliber: dn50-500; pressure: pn1.6-6.4mpa;
Temperature: q-29-350 ℃, c-29-450 ℃, p-30-540 ℃;
Medium range: water, steam, oil, gas, fluid, medium containing hard particles and impurities.
Related products:
Electric Center Line Butterfly Valve
Electric Sanitary Butterfly Valve
Other related products:
Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Dry screw vacuum pump

Expression method of model compilation for pneumatic gate valve

With the help of compressed air as the power source, the pneumatic gate valve drives the gate to open and close the valve through the up and down lifting of the valve stem. It has the advantages of reliable performance, convenient operation switching and maintenance, and has been widely used for various media control by petroleum, chemical, marine and other departments. For the application of pneumatic gate valve, structural form, and valve body material, the user should be familiar with the description of pneumatic gate valve model preparation, so as to avoid the problems of wrong model selection, wrong order and unknown technical parameters, resulting in goods replacement and return.
The description of model preparation of pneumatic gate valve mainly explains the additional conditions, driving mode, connection type, structural characteristics, sealing material, pressure grade and valve body material of gate valve in detail. Other customized or special product models are not applicable to this method and need to be explained separately.
Model preparation method of pneumatic gate valve:
Additional code of gate valve: WZ refers to bellows gate valve, DZ low temperature gate valve, nkz vacuum gate valve and PZ knife gate valve;
Type of gate valve: Z;
Drive mode: manual without code (usually omitted according to regulations), 2 electro-hydraulic, 3-worm, 5-bevel gear drive, 6-pneumatic, 9-electric;
Connection mode: 4 flange connection, 6 welding, 7 clamp type;
Structural form: 0 elastic ram, 1 rising stem wedge single ram, 2-rising stem wedge double ram, 3-rising rod parallel single ram, 4-rising rod parallel double ram, 5-concealed rod wedge-shaped single ram, 6-concealed rod wedge-shaped double ram, 7-concealed rod parallel single ram, 9-rising stem parallel double ram;
Sealing material material: W valve body directly processed, t alloy, X rubber, f fluoroplastic, h-cr stainless steel, y cemented carbide, m Monel alloy; pressure rating: pn1.0-32mpa, 16 = 1.6Mpa, pressure of 16KG, 150lb-1500lb, and daily pressure of 5-63k;
Valve body material: z-gray iron, Q ductile iron, t alloy, C carbon steel, P stainless steel 304, R stainless steel 316, V chromium molybdenum vanadium steel.
Description of model preparation of pneumatic gate valve:
Pz673h-10p stainless steel pneumatic double clip knife gate valve
1. PZ: knife gate valve;
2. 2,6: pneumatic transmission mode;
3. 3 and 7: the connection mode is clip connection;
4. 4. 3: the structure is the rising stem parallel single gate;
5. 5. H: the sealing material is stainless steel;
6. 6,10: the nominal pressure is 1.0MPa;
7. 7. P: the valve body is made of stainless steel.
Related products:

Vacuum Brazing Machine For PCD Diamond Tools

Electric Hard Seal Butterfly Valve
Other related products:

Vacuum pump
Vacuum pump selection

Where are ball valves commonly used

When the ball valve is fully open or fully closed, the sealing pair is completely isolated from the medium, and the medium passing at high speed will not erode the sealing pair. Ball in the opening and closing is a process of rotary wiping, so most ball valves can be used for the medium with suspended solid particles, select suitable wear-resistant seat sealing material, also can be used for powder media. Through type ball valve is used for cutting off. It is widely used. Three way and four-way ball valves are used to distribute medium and change medium flow direction. V-type ball valve can be used for throttling.
Full bore ball valve full open type easy to clean the ball through the cleaning pipeline, widely used in petroleum and chemical pipeline. It has wide application range, working pressure from vacuum to high pressure, nominal diameter DN8 ~ 3000, working temperature - 254 ~ 815 ℃. If the valve seat seal ring and other parts are made of non-metallic materials, their pressure temperature rating is lower than that of the ball valve shell (metal), resulting in the actual use of ball valve pressure, temperature and medium are limited.
When the valve seat seal ring and other materials are non-metallic, the fire-resistant and anti-static structural performance of the ball valve should be considered. It is difficult to grind the ball, but it is more difficult to process the metal seal ball valve. When dust, coking and viscous media are filled into the movable sealing ring, the displacement of the valve seat will be affected, thus affecting the sealing. Therefore, it is not suitable for the medium with coking and high viscosity.
The floating ball can float freely in the valve seat, so it has the advantages of simple structure and light weight. However, it must be light enough to bear high sealing specific pressure, large operating torque and not suitable for high pressure and large diameter valves. Fixed ball valve ball will not move, the whole natural, so small torque, good sealing performance, suitable for large diameter high pressure environment, but the structure is complex, complex process, high price.
Related products:
Electric Ultra-Thin Ball Valve
Air Conditioner Cooling Water Electric Butterfly Valve
Other related products:
Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Dry screw vacuum pump

Pressure rating of wafer butterfly valve

Q: Hello valve, what is the pressure level of butterfly valve? What is the maximum pressure of butterfly valve?
Answer: clip butterfly valve can be divided into two types, clamp hard seal butterfly valve and clip soft seal butterfly valve.
The maximum pressure of the butterfly valve can be 16 kg, that is, 1.6 MPa, which can be used in water, gas, oil medium pipeline. If the pressure exceeds 16 kg, the soft seal seat material will be damaged due to excessive pressure, which will affect the sealing performance of the valve.
It is recommended that the maximum pressure applicable to the clamp hard seal butterfly valve should not exceed 4MPa. Although the structure of the hard seal can withstand high pressure, the pressure bearing capacity of the clamp type connection is not as good as that of the flange connection. If the pressure is too high, it may cause leakage at the joint between the butterfly valve and the flange.
Related products:

Vacuum Brazing Machine For PCD Diamond Tools

Electric Proportional Integral Regulating Ball Valve
Electric Wafer Type Butterfly Valve

Other related products:

Vacuum pump price list
Basic vacuum pump selection
Vacuum pump selection
Vacuum pumps types of industrial

Solve the engineering difficulty problem of drag chain

Tl-3 heavy engineering plastic tow chains are also resistant to oil, salt, acid and alkali. The operating speed and acceleration of the engineering nylon plastic tow chain can be up to 5 m/s, and its operating life can be up to 5 million reciprocating motions under the condition of normal overhead use. Engineering plastic chain has been widely used in CNC machine tools, electronic equipment, stone machinery, glass machinery, injection molding machine, manipulator, lifting transportation equipment, automatic warehouse, etc.
The engineering plastic drag chain is made of reinforced nylon injection molding with strong resistance to pressure and tension. The drag chain looks like a tank chain and is composed of many unit chains which rotate freely between them. Li I have the same series of engineering plastic trailing chains, same outer height and pitch, different inner height and arch radius R to choose. The engineering plastic drag chain unit is composed of left and right chain plate and upper and lower cover. Each section of the drag chain can be opened, which is convenient for installation and disassembly without threading. After the cover plate is opened, cables, oil pipes and air pipes can be put into the drag chain. In addition, the engineering plastic drag chain can provide a separator to separate the space within the drag chain as required. Engineering plastic drag chain has good toughness, high elasticity, wear resistance and flame retardant, stable performance at high and low temperature, can be used outdoors.
Related products:

Vacuum Brazing Machine For PCD Diamond Tools

Special Drag Chain For Die Casting Machine
Other related products:

Vacuum pump price list
Basic vacuum pump selection
Vacuum pump selection
Vacuum pumps types of industrial

What are the difficulties in the maintenance of industrial water purification equipment

Industrial water purification equipment is widely used in laboratories, hospitals and some large factories. In these areas, the water quality requirements are generally high, and the water needs to be treated by water purification equipment before it can be put into use. So what are the maintenance difficulties of this kind of industrial water purification equipment?
Membrane clogging. If the prefilter is not replaced or cleaned for a long time, the water quality inside the machine is far worse than that before entering the machine. The raw water quality is poor, but the proportion of wastewater is small, resulting in the blockage of waste water solenoid valve or flushing combination valve, and then no wastewater is produced, or there is very little waste water, which leads to the blockage of membrane and shorter service life.
The filter element is blocked. One of the common faults of the equipment is the blockage of the filter element. It is very important to replace the filter element for prolonging the service life of the equipment.
There is something wrong with the transformer. If there is a fault in the transformer, it can not provide the voltage required for the normal pressurization of the pump, so the speed will be slow, the increased pressure will be small, and the pressurization will be small.
Naturally, the pressure required for the tap water to pass through the RO membrane will not be reached. At this time, the water production will be slow. After eliminating the factors of pump and membrane, it is necessary to replace a new transformer.
Water tank material. Because of its high purity and almost no impurities, ultrapure water is easy to absorb pollutants from the external environment and cause pollution. If the water storage tank we use is low-grade plastic, it will be easier to dissolve some organic matters, thus increasing the conductivity of water, leading to the decline of water quality.
Related products:
Ultrafiltration System For Water Purification
Fully Automatic Water Softener
Other related products:

Vacuum pump price list
Basic vacuum pump selection
Vacuum pump selection
Vacuum pumps types of industrial

Tank stack pressure non negative pressure water supply equipment

Operation principle of tank superimposition without negative pressure water supply equipment
Water supply way along with the social progress, changing, in the traditional way of water supply, water reservoir is indispensable, the tap water pipe network to supply water is stored in a reservoir, with this buffer, originally in pipe network of water into the reservoir with pressure is to be lifted after the momentum, need to start anew pressurized water supply, transport, it caused the waste of resources.
Non-negative pressure water supply equipment, on the basis of the transformation and upgrading, is a new energy-saving water supply equipment. It is directly connected with the tap water pipe network to provide overpressure water supply on the basis of the original water pressure to save energy; At the same time, the whole process, completely closed, no contact with the outside world, will not pollute the tap water pipe network, is an ideal secondary water supply equipment. It has many advantages, such as complete closure, no pollution, small footprint, quick installation, reliable operation and convenient maintenance.
Automatic intelligent non-negative pressure variable frequency water supply equipment, is directly connected with the tap water pipe network through the steady flow tank, according to the set way direct secondary pressure water supply and will not generate negative pressure to the tap water pipe network equipment. It mainly consists of water pump unit, non-negative pressure stabilizing tank, pressure tank, variable frequency water supply control cabinet, filter, backflow preventer, sensor, valve, instrument, pipeline, equipment base and so on.
When the tank type non-negative pressure water supply equipment is put into use, the water from the municipal pipe network will flow into the non-negative pressure stabilizing tank and discharge a large amount of air in the tank through the exhaust valve. When it is discharged into the tank without air, the float ball in the valve will be floated by water, the driving plug will jump to the closed position, and the exhaust port will gradually close and stop exhaust to prevent water outflow. When the water flow in the steady flow tank is normally transported, the air will gather again in the steady flow tank. When the water level in the tank drops, the float ball will then drop and reach the specified position, and the air will be discharged by the vent.
Equipment normal operation, if appear municipal pipe network of water shortage, municipal feed line stop or a steady flow of water supply tank pressure below atmospheric pressure, the steady flow tank water level drops, floating ball drops, drive the plug head open, inhaled air, maintain steady flow tank pressure equals the atmospheric pressure, avoid the municipal pipeline network, the phenomenon of the negative pressure inside.
When the pressure in the municipal pipe network is lower than the set pressure required by the user, the variable frequency speed-regulating water pump starts to run to ensure that the water pressure in the pipe network meets the user's demand for water. Obviously, the higher the water pressure of the municipal pipe network, the lower the speed of the pump; The lower the water pressure of the municipal pipe network, the higher the speed of the pump. When the water pressure of the municipal pipe network meets the demand of users, the equipment will automatically stop working, and the water of the municipal pipe network will be directly supplied to users through the bypass pipe.
If there is an emergency, such as when the municipal pipe network stops supplying water, the water level in the steady flow tank gradually drops. When the water level drops to a low level, the liquid level gauge on the steady flow tank will send out the stop signal, and the equipment will automatically stop running and display the water shortage protection signal. In case of power failure, the water supply equipment without negative pressure will be directly stopped, and the water of the municipal pipe network will be directly supplied to the user from the equipment bypass pipe.
Related products:
Variable Frequency Constant Pressure Water Supply Equipment
No Negative Pressure Water Supply Equipment

Other related products:

Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

How to deal with transformer cooling system fault

For forced oil circulation air-cooled, water-cooled and water-cooled transformers, when the cooling system (fan, submersible oil pump, cooling water system, etc.) fails and the cooling device is stopped, the following treatment shall be carried out:
(1) In case of optical word signals of "failure of working power of cooling device" or "failure of standby Power" on the transformer control panel, the cause shall be immediately found out and the cooling device shall resume working as soon as possible.
(2) When the optical word signal "cooling water interruption" appears on the transformer control panel, the cause shall be promptly checked and the cooling device shall resume working.
(3) If the above two fault signals occur at the same time, attention should be paid to the change of oil on the transformer upper layer and oil level of the oil pillow. When the cooling device is out of service, the oil temperature will rise sharply and the oil may escape from the explosion-proof tube (or safety airway). When the cooling device resumes operation and the oil level of the oil pillow drops sharply again, and the oil level drops below -20℃ and continues to decline, the heavy gas protection device should be stopped immediately. If the cooling unit cannot be resumed within the specified time, the duty shall be reported long and the transformer withdrawn from operation.
Related products:
Transformer Cooling System Of Working Principle
Water Cooling System Structure
Other related products:

Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Basic knowledge of wind turbine

Classification of fans:
a) Forward tilt (single suction, double suction, applicable pressure below 1000Pa)
b) Backward tilt (single piece, wing section, single suction, double suction, applicable pressure above 1000Pa)
c) Axial flow (iron fan blade, spiral pulp type)
d) Oblique flow and mixed flow
Fans can be divided into:
Boiler, cooling, explosion-proof, anti-corrosion, ship, textile, tunnel, dust exhaust, general industrial ventilation, air conditioning fan, etc.
Related products:
How To Improve The Impeller Of Centrifugal Fan
How To Maintain The Main Parts Of The Fan To Ensure Production?
Other related products:

Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Heating source type in heat treatment industry of technical analysis

In recent 20 years, the domestic development and introduction of non-oxidizing heating furnace with advanced level, such as vacuum furnace, protective atmosphere furnace, controllable atmosphere furnace, ion nitride furnace and so on account of less than 20%, however, these advanced heating equipment due to management and operator quality is not high, did not give full play to the equipment due to the role.
Therefore, the technical transformation of heat treatment furnace is imperative. To promote new technology, develop new technology materials, training workers to improve the quality of the industry staff. The renovation of heat treatment process equipment is also quite heavy. It is equally important to renovate the traditional old heating equipment in service while promoting the use of new vacuum heating equipment and protective and controllable atmosphere heating equipment. Choosing practical and feasible schemes and technological transformation measures and spreading them can create considerable wealth for enterprises and the country.
Natural gas is the best energy. Rational choice of energy is the primary problem to be considered in energy saving of heat treatment equipment. Generally, heat treatment energy can be divided into electricity and fuel. The use of electricity or fuel, and the type of fuel used, depends on a combination of factors such as production costs, energy availability, ease of operation and control, reliability, the nature of the heat treatment process and its impact on the ecological environment.
Electric heating is clean, the temperature is easy to control, less auxiliary facilities, simple operation is its advantages. In theory, 70%~80% heat utilization rate can be obtained by heating with resistance furnace, but electricity is secondary energy. Considering the efficiency of generation, the comprehensive heat utilization rate of resistance furnace does not exceed 30%. The price of electricity is high, and so is the cost of production. Due to the development of science and technology and the increase of the proportion of hydropower and nuclear power, the price of electric energy in the world tends to decrease relatively. Therefore, the current trend in the world is still to increase the proportion of electric energy.
Fuel is cheaper than electricity, but its combustion process is more complicated, and fuel causes more environmental pollution than electricity. However, with the development of control technology, it is possible to control the temperature of gas and liquid fuel furnace accurately.
Natural gas is primary energy, heat treatment furnace in addition to direct combustion can obtain at least 30% of the thermal efficiency, flue gas waste heat can also be used to preheat combustion, with air, furnace heating, cleaning fluid and quenching oil heating and other domestic purposes, so that the absolute heat utilization rate can reach more than 80%. At present, advanced industrial countries have a considerable proportion of heat treatment fuel furnace.
According to the investigation, the proportion of fuel furnace used for heat treatment in Western European countries is 20%~30%, and 25.5% in The United States, while the fuel furnace in Japan mainly USES heavy oil, kerosene, liquefied gas and city gas, accounting for 61.4% in total.
In recent 10 years, there has been a great breakthrough in the exploration of natural gas in China. It will create very convenient gas conditions for heat treatment industry. The majority of enterprises should see this favorable prospect of heat treatment energy change and fully consider and utilize it in the technological transformation of heat treatment production and the updating of equipment.
Enterprises usually choose the furnace from process requirements, workpiece shape and size, and production batch. From the point of view of heat treatment energy utilization, the efficiency, sealing and shape of the furnace should be considered. When the workpiece batch, single variety, should use continuous furnace. Under the same furnace volume, the round (column) furnace is more energy-saving than the square furnace.
Related products:
How To Choose High Temperature Trolley Furnace
How To Ensure The Stability Of ADI Castings In Isothermal Quenching Furnace
Other related products:

Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Main components of nitrogen making high pressure air compressor unit

When the driver drives the compressor through V-belt, the free state air is drawn into the first stage cylinder (I) through the intake filter, compressed to a certain pressure, and then discharged into the first and second stage intercoolers and separators (3) after the separation of cooling oil and gas, and then into the second stage cylinder (II), further compressed to a higher pressure, and then discharged into the second and third stage intercooler coolers (4) and separators (5) for the compressed air Oil and condensate are cooled and filtered.
Then enter the third stage cylinder (III) to compress to the final required pressure, and then enter the separator (7) to filter the purifier (8), further remove the oil, condensate and oil vapor in the compressed air of the nitrogen generator, to obtain the cooled, clean and tasteless high-pressure air, and inject the qualified high-pressure cylinder which can be separated and filtered from the separator behind the cylinders at all levels.
Related products:
Booster pump
Water jet vacuum pump

Other related products:

Liquid ring vacuum pump
Oil Diffusion Vacuum Pump

Two ways of heating a resistance wire

High temperature resistance wire factory introduces two ways of heating resistance wire:
1. Insert the heating element composed of resistance wire into the mold heating plate;
2. Place the resistance wire directly in the heating plate of the mold.
When designing mold resistance heating, the following basic requirements must be considered:
1. Protective measures of the heating mold should be considered to reduce heat conduction and heat radiation loss. Generally, asbestos insulation board is set between the mold and the upper and lower pressing plate of the injection machine, as well as around the mold. The thickness is about 4-6mm;
2. Different power heating elements are used in the central and edge parts of the heating plate respectively. Generally, the power of the heating elements in the central part of the mold is slightly lower, while the power of the heating elements in the edge part is slightly higher.
3. Two sets of temperature instruments should be installed on the electric heating plate of large molds to control and adjust the temperature of the central and edge of the electric heating plate respectively;
These are the two ways of heating a resistance wire.
Related products:
How Should Vacuum Oil Filter Choose Filtration Accuracy
Nickel-Chromium Resistance Wire
Ferrochrome Aluminium Resistance Wire
Other related products:

Liquid ring vacuum pump
What is liquid ring vacuum pump?
Liquid ring vacuum pump manufacturer

Induction hardening process for wheel support

Induction heat treatment is characterized by its ability to finish the surface quenching of the workpiece in a very short time. In the past 30 years, induction heat treatment has developed rapidly and been widely used in automobile manufacturing industry. According to the technical requirements of heat treatment of wheels, two technological schemes are drawn up:
Scheme 1 is integral heating;
Scheme 2 is the trial production of two sets of sensors by scanning heating.
(1) The end of the workpiece is not hardened after the integral heating quenching.
(2) The depth and hardness of the hardening layer of the scanned quenched workpiece need to increase power and adjust the size of the inductor; All the angles meet the requirements, but the productivity is low, and the heat in the soft part is not easy to penetrate into people, and the heating depth is easy to be shallow, but the productivity is high, which affects the fatigue life of the product. When the wheel bracket is heated, the hardened part is finished once, which is not easy to form soft belt and has high productivity. The use of quenching waste heat for self-tempering is simple, but the sensor structure is complex, the process is inconvenient to adjust, and the sensor life is not stable. The fatigue strength of the parts has obvious correspondence with its surface stress, that is, the compressive stress is large, the fatigue strength and fatigue life are increased. As the specific volume of martensite increases in the quenching layer, the residual compressive stress can be formed for the parts with surface quenched by induction heating.
Medium frequency heating furnace, using imported power devices, digital control technology, small size, light weight, easy to install, energy-saving environmental protection, automatic control and protection, super safety, all kinds.
Related products:
Induction quenching process for steering screw
induction heat treatment quenching process of bending cutters
Other related products:

Vacuum pumps for battery production
Vacuum pumps for excimer and gas lasers
Vacuum pump for vacuum infusion

Requirements for vacuum sintering furnace in vacuum heat treatment furnace

1. Vacuum sintering furnace needs to have air tightness in structure and function, that is, it can isolate the air outside the furnace and ensure the protection atmosphere inside the furnace unimpeded.
2. Vacuum sintering furnace should be equipped with perfect dewaxing device or dewaxing belt in terms of structure and function.
3. The temperature of each section in the sintering furnace is controllable and the atmosphere of each section is adjustable.
4. For continuous sintering furnace, it has transmission device and transmission speed can be adjusted.
5. With fast cooling device, the sintered parts can be cooled quickly to the temperature of coming out of the oven.
Related products:
vacuum heat treatment furnace of cooling system
Vacuum sintering furnace leak detection method
Other related products:

New Dry Compressing Screw Vacuum Pump
Environmental protection wastewater treatment Roots blower

Oil filter has made new achievements in decolorization technology

In the research and development of oil filter, the oil filter used to filter the mechanical impurities and moisture of oil products has become a widely known technology. However, the decolorization of oil filter to make it closer to or even fully match the quality of the new oil is still a topic that many researchers keep exploring.
After continuous theoretical exploration and experimental operation, the company finally developed a new type of oil filter, which not only has the traditional function of removing impurities, moisture and harmful gases, but also has high-performance decolorization function.
After practical application, this decolorizing oil filter has the most obvious filtering effect and higher filtering accuracy. In line with modern industrial equipment for high precision oil demand.
How does an oil filter achieve this filtering effect? The engineer made the following introduction:
A. Operating principle of the oil filter: vacuum decompression, film atomization, three-dimensional flash evaporation, dehydration and emulsification breaking and micro-filter purification technology; the whole machine has no filter element, no filter plate and pure physical decolorization and odor removal;
B. Oil filter's action object: anti-wear hydraulic oil (black, red, white, etc.), mechanical oil (12#, 16#, 32#), light oil (diesel, kerosene, etc.) and other lubricants;
C. Vacuum separation system of oil filter: vacuum separation technology from Italy has been introduced, which is composed of atomizer, reactor, separation chamber, accumulator oil tank, exhaust chamber, foam eliminator, observation window and liquid level device.
(1) atomizer: atomize the oil into the vacuum separation system and spray it onto the reactor;
(2) reactor: composed of multiple rashig rings, let the oil mist sprayed on the reactor to form an oil film, so that the water in the oil, gas as far as possible to volatilize, greatly improve the efficiency of dehydration and degassing;
The separation chamber: located between the reactor and the fuel tank, the oil is separated again from the water, gas and oil when the oil runs in this section;
And gather the tank; Will separate the water, gas oil accumulation, by the exhaust pump discharge;
Extraction chamber: the water vapor and residual gas separated from the reactor and separation chamber are extracted from the vacuum separation system. Avoid redissolving water and gas in oil;
• antifoaming device: the use of Japanese omron device; Automatic elimination of oil bubbles in the oil, replace manual defoaming, so as to achieve online operation unattended;
Observation window: use toughened glass as observation mirror, replace plexiglass as observation mirror when the defect of depression deformation under high temperature and high vacuum conditions;
Realization of automatic level control device: being configured in and out of the oil automatic balance adjustment, constant oil filtration system to achieve the purpose of man-machine separation, and set up a high level and low level protection system;
'levies adopt complex three-dimensional flash evaporation system, thereby increasing the evaporation area and prolong the cleansing oil in vacuum separation system of evaporation time, greatly improve the dehydration (free water, micro water) degassing efficiency;
D. special filtration system of oil filter:
Under the action of interfacial tension friction, the oil produces a certain amount of metal iron foam, which cannot be solved by filtering (too much iron foam leads to frequent blocking of magnetic filter element). This system can absorb various sizes of iron foam, the capacity of pollution is the general magnetic filter 30 ~ 50 times. Electrostatic degaussing can effectively filter the gum, asphaltene and carbon residue of aging oil products (a major obstacle that cannot be solved by ordinary oil filters), which greatly improves the cleanliness of oil products.
E. The oil filter is equipped with an automatic backwashing system:
With back flush fast, clean, completely, especially for some special oil cleaning complex, must remove to cleaning process, as well as the groove part of the equipment cleaning, from the design of the device itself and pipe connection, on the basis of fully out of the past artificial problem caused by a variety of cleaning, give full consideration to the customers in the use of equipment in the process of encounter various difficulties.
F. Pure physical decolorization system of oil filter:
It is equipped with rotatable uniform heat mixing system (the key technology of decolorization) to absorb and remove impurities such as melanin which cannot be filtered
Related products:
lubricating oil filter of operation advantage
vacuum oil filter for new air cooling technology of application
Other related products:

vacuum pump to replace for material loading system
blower for fish farm