The wedge knife gate valve can be made into one
6. The gate of the knife gate valve has a shearing function, which can scrape off the adhesion on the sealing surface and automatically remove debris. The valve body and packing culvert are all precision casting, in which the valve body is integrally cast with flange, the material can be selected according to user needs 304, 316, 316L, WCB, 2Crl3, the sealing ring is made of PTFE reinforced polytetrafluoroethylene, corrosion resistance Wear-resistant and non-sticky. Instructions for the purchase of knife gate valves 1. Check the packing part It requires compaction to ensure the sealing of the packing and the flexible opening of the gate; 4. 9. To date, the United States and Japan have the largest amount of knife gate valves in the world., completely solve the ordinary gate valve, flat plate Gate valve, globe valve, regulating valve, butterfly valve, ball valve and other valves have heavy weight, large flow resistance, large area, difficult installation and other difficult problems. Most gate valves are forced to seal, that is, when the valve is closed, it must rely on external force to force the gate to the valve seat to ensure the sealing of the sealing surface. of mine power plants, to connect or cut off cement slurry and gold mine in pipelines Powder, ore, slag, slime, paper pulp, wood pulp, tailings, fiber, dust, chemical treatment sewage, sedimentation tank, asphalt, silo export, fruit, grain, slaughterhouse wastewater and other media.
The stainless steel gate can prevent seal leakage caused by corrosion, and fine grinding and polishing treatment can obtain better sealing effect. That is, the medium pressure can be used to press the sealing surface of the gate plate to the valve seat on the other side to ensure the sealing surface. Knife gate valve can also choose any drive mechanism. The wedge knife gate valve can be made into one .The whole is called a rigid ram; it can also be made into a ram with a small amount of deformation to improve its manufacturability and make up for the deviation of the sealing surface angle during processing. When installing the valve, the necessary space for the valve drive must be reserved; 6. parameter. Knife gate valve installation and usage instructions 1. 2. The scientific upper seal stuffing box design makes the upper seal safe and effective and durable. The wiring of the drive device must be carried out according to the circuit diagram; 7. After the appearance of knife gate valves, a large number of general cut-off valves and regulating valves have been replaced by them.
The extrusion block ensures the effective sealing of the gate. The stainless steel valve body is durable, the valve body rib design improves the strength of the valve body, and the double head screw is used to open and close more quickly. The overall stainless steel material can prevent corrosion damage. It is cut by a blade-shaped gate that can cut fiber materials. When purchasing, users must indicate the nominal valve diameter, pressure and required standards for valve connection; 2. 4. 11, V-shaped gate can be used as a regulating valve. Knife gate valve precautions Knife gate valve opening and closing parts are gates, the movement direction of the gate is perpendicular to the fluid direction, knife gate valve can only be fully opened and fully closed, can not be adjusted and throttled. This type of valve should generally be installed vertically in the pipeline. When the knife gate valve is closed, the sealing surface can be sealed only by the medium pressure.
A hard Teflon scraper is installed at the upper end of the blade to prevent dust, grit and other abrasive substances from entering the packing box, which can significantly improve the life of the blade. The triangular bracket saves raw materials and guarantees the required mechanical properties. Knife gate valve structure diagram Analysis of thirteen characteristics of the knife gate valve: 1. Most knife gate valves are forced to seal, that is, when the valve is closed, it must rely on external force to force the gate to the valve seat to ensure the sealing surface. 7. Knife gate valve seal: hard seal, soft seal, single side seal, double side seal and other material seals. When the valve is closed and back pressure is applied, the valve plate does not shift. 10. If the required valve has special requirements, it must indicate special dimensions, special materials, etc. 3. The medium and the gate have two sealing surfaces. The ultra-thin knife gate valve completely solves the large flow resistance of ordinary gate valves, flat gate valves, ball valves, globe valves, regulating valves, butterfly valves and other valves due to its small size, small flow resistance, light weight, easy installation and easy disassembly.
Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, fluorine lining, etc. Before installing the valve, the user must check the valve model, connection size and pay attention to the flow direction of the medium to ensure consistency with the valve requirements; 5. The gate moves up and down in the side guide groove and is pressed against the valve seat by the lug at the bottom. The gate has two sealing surfaces, usually 50. The gate of the wedge-type knife gate valve can be made as a whole, called a rigid gate; it can also be made as a gate that can produce a small amount of deformation to improve its processability and make up. Its opening and closing parts are gates. Knife gate valve drive mode: manual, sprocket, electric, pneumatic, hydraulic, bevel gear, electronically controlled hydraulic and gas-hydraulic drive. The guide block on the body of the knife gate valve makes the gate move correctly. , Heavy weight, difficult installation, large Diaphragm Valve Manufacturers area and other difficult problems.
The bottom end of the blade is processed into a blade shape, which has the function of cutting off soft materials such as fiber, paper pulp and wood pulp, and has good opening and closing functions. Work normally under the temperature of -29-550℃. This kind of ram is called an elastic ram. The movement direction of the gate is perpendicular to the direction of the fluid. This is self-sealing. When the knife gate valve is closed, the sealing surface can be sealed only by the medium pressure. Before installing the knife gate valve, you must check the valve cavity and sealing surface and other parts, and no dirt or sand particles are allowed to adhere; 2. 5. The bolts of each connection part require uniform tightening; 3. The two sealing surfaces of the most common mode gate valve form a wedge shape. The sealing surface of the gate can be lifted, which can scrape off the adhesion on the sealing surface and automatically remove debris. The knife gate valve has a small installation space, low working pressure, difficult to accumulate debris, and low price.. The deviation of the sealing surface angle during processing, this kind of shutter is called an elastic shutter. 13. The knife gate valve must be regularly maintained, and it must not be randomly collided and squeezed to avoid affecting the seal.
The full-circle DC channel design has no slag or jamming. Knife gate valve has the advantages of simple and compact structure, reasonable design, light-weight materials, reliable sealing, light and flexible operation, small volume, smooth passage, small flow resistance, light weight, easy installation, easy disassembly, etc. Short structure length can save raw materials, install space, and also effectively support pipeline strength. Knife gate valve is suitable for oil, water and steam pipelines of coal preparation, slag discharge, urban sewage treatment, food, papermaking, medicine, petroleum, chemical industry, etc. The valve body does not actually have a cavity. The valve plate has 5 support points, so that the valve plate has good self-centering.Knife gate valve is also called knife gate valve, knife gate valve, slurry valve and mud valve. 12. Compact design, small space occupation, light weight, cheap price, easy installation, perfect anti-wear and anti-blocking measures, easy maintenance, convenient use and long life, and optional drive device. The wedge angle varies with the valve parameters, usually 5°. If a higher medium tightness is required, an O-shaped valve seat can be used. Knife gate valve shape: bright rod and dark rod. Analysis of thirteen characteristics of the knife gate valve. 8. The stainless steel gate can prevent seal leakage caused by corrosion. Two-way seal
It should regularly check and record the readings
In addition to this, we have to consider parking. Commissioning work: check whether the connecting parts are loose; move the coupling by hand to rotate the rotor several times to see if the unit rotates flexibly, whether there is a noise and a sense of unevenness, to determine whether there are foreign objects in the pump or whether the shaft is bent The installation of the seals is not correct; check whether the clean No.Operation check: When the pipeline pump is running normally at power frequency (frequency conversion), it should regularly check and record the readings of its pump set ammeter, voltmeter, inlet and outlet vacuum gauge, pressure gauge and flow meter.
Needless to say, there are always problems with the machine during use, but as long as good use and maintenance can ensure the best performance of the machine, in order to ensure normal oil supply, the normal use and rapid maintenance of pipeline pumps have become oil depot equipment The most important task of management. 20 lubricating oil in the sealed cavity is filled into the 1/2 cavity space; whether the surface of the pump unit is clean; the unit turns to the no-load test. There should be no obvious jet fuel leakage at the shaft seal. There are two main emergency stop conditions: (1) The pump Level Indicators Suppliers motor working ammeter indicates abnormality (excessively large or very few); the pump system makes abnormal noises. Whether the vibration, noise and temperature rise of the unit are normal.
⑶ The pump motor produces odor, aviation oil leaks at the shaft seal, and the bearing temperature exceeds 75 degrees. ⑵ The pump inlet vacuum pressure gauge and outlet pressure gauge indicate abnormality, the pump body vibrates greatly and emits abnormal sound, and the performance is seriously degraded. Normal stop: Close the discharge valve to lightly load the pump and stop the motor
