Pneumatic single seat control valve use the compressed air as the power source, take the cylinder as the actuator, and with the aid of the electric valve positioner, the converter solenoid valve, the guard valve and other accessories to drive the valve, to achieve on-off or proportional regulation Receive the control signal of industrial automation control system to adjust the flow, pressure, temperature and other process parameters. Pneumatic control valve is characterized by simple control, rapid response, and essentially safe, no additional explosion-proof measures.
Pneumatic single seat control valve small, light, high performance, large capacity, is in line with IEC standards of a new generation of general control valve products. It is suitable for general fluid medium and process conditions of the production process system. The utility model is composed of a pneumatic multi-spring film actuator and a low flow resistance single-seat valve. The new actuator has the advantages of high degree, light weight, simple installation and calibration, compact structure, smooth flow passage and large flow coefficient.
Pneumatic single seat control valve stable operation, with reliable action characteristics, small seat leakage, accurate flow characteristics, wide adjustable range and so on. Its unique advantages in a wide range of users to achieve high-quality control effect.
6-Point Routine Repair Of Pneumatic Single Seat Control Valve:
1. Check the inside wall of the body: In the case of high pressure difference and corrosive medium, the inside wall of the valve and the diaphragm of the diaphragm valve are often impacted and corroded by the medium
2. Check the seat: Because of the work of the media infiltration, fixed seat with the inner surface of the screw corrosion and easy to make the seat relaxation
3. Check the valve core: The valve core is one of the movable parts of the control valve, the erosion by the medium is more serious, inspection and repair to carefully check whether the valve core parts are corroded. Seriously damaged spool should be replaced; check packing: Check the packing asbestos rope is dry, if the use of polytetrafluoroethylene packing, should pay attention to check whether the aging and its mating surface is damaged.
4. Check whether the rubber film in the actuator is aged and cracked.
6 Points To Note For Use Of Pneumatic Single Seat Control Valve:
1. Should be installed vertically on the horizontal pipeline, in special circumstances need horizontal or inclined installation, generally should add support. The circular plate installed on the wall of the insulated box should be parallel to the wall of the insulated box.
2. Should be installed near the ground or floor, in order to maintenance and repair, for the installation of positioner or hand wheel mechanism, should ensure observation, adjustment and operation and convenience.
3. Generally set by-pass pipeline, in order to automatic control system failure or maintenance to switch to manual operation, not to stop production.
4. When the handwheel mechanism is installed, it can also be operated manually by omitting the by-pass pipe, and can also be used to limit the opening. When stop using, the handwheel mechanism must be restored to the original neutral position in order to facilitate the normal operation of the automatic control system.
5. Pneumatic control valve installation, should make the medium flow direction and the direction indicated by the valve body.
6. Before the installation of the pipeline should be clean dirt, slag. After installation, make full opening, clean the pipeline, etc. and test the tightness of each joint.
6 Common Failures Of Pneumatic Single Seat Control Valve:
1.The Control Valve Does Not Operate. Malfunctions and causes are as follows:
1). No signal, no air supply.
Post time: Dec-15-2021