Working characteristics of hydraulic pneumatic control valve

hydraulic pneumatic control valve is controlled hydraulic pneumatic valve, pneumatic valve and it consists of a main attached catheter, guide pneumatic valve, needle type pneumatic valve, pneumatic ball valve and pressure gauge, etc. Depending on the purpose, function and place can be turned into a remote control float pneumatic valve, vacuum pneumatic valve, slow close check pneumatic valve, flow control, pneumatic valve, pneumatic valve, pressure, hydraulic electric control of pneumatic valve, etc. Hydraulic control pneumatic valve working principle:
is more than the downstream pressure difference delta P, controlled by pneumatic valve guide, make diaphragm ( The piston) Hydraulic differential operation, entirely by hydraulic automatic adjustment, so that the main pneumatic valve pneumatic valve fully open or fully closed or in a state of adjustment. When entering the diaphragm ( The piston) Of control room above the pressure downstream of the water is discharged into atmosphere, or low pressure area, effect in the pneumatic valve at the bottom of the dish above and below the diaphragm of the pressure value is greater than the pressure value, so the main pneumatic valve pneumatic valve to the fully open position; When entering the diaphragm ( The piston) Pressure of control room above the water can't row to the atmosphere or downstream low pressure area, the diaphragm ( The piston) At the top of the pressure value is greater than at the bottom of the pressure value, so will the Lord pneumatic valve pneumatic valve disc pressure to the fully closed position; When the diaphragm ( The piston) Of control room above the pressure in the inlet pressure and outlet pressure, the main pneumatic valve pneumatic valve tray is in a state of adjustment, adjust the position depends on the type of needle catheter system pneumatic valve and adjustable guide joint control of pneumatic valve.
adjustable pneumatic valve can through the downstream outlet pressure and along with the change of it up or down its own small pneumatic valve port, thus changing the diaphragm ( The piston) Of control room above the pressure value, the control of the pneumatic valve pneumatic valve position adjustment.
I plant production of hydraulic pneumatic control valve is to use the foreign advanced technology, and the company many times to improve design. Carbon steel as the main material, pneumatic valve using thick-walled seamless tube welding and become, pneumatic valve plate for nodular cast iron, reliable, and more durable than cast iron, external appearance more beautiful, and the price is better, and have the promptness of fete, connected to the tube. Can be widely used in water supply and drainage, fire protection, petroleum, chemical, pharmaceutical, steel, etc on the pipeline as a truncated or adjustment.