What is a hydraulic pneumatic control valve

hydraulic pneumatic control valve driven by medium pressure tube, open and close, regulating pneumatic valve. It consists of a main pneumatic valve and pipe, needles, pneumatic ball valve and pressure gauge and so on, different purposes, on different parts of the function, can be a remote-controlled floating ball, pneumatic valve, pneumatic safety valve open, security of pneumatic valve is closed, flow controller, pressure pneumatic valve, hydraulic electric control pneumatic valve, pneumatic valve emergency shutdown. The pilot's medium level and the change of the pressure pneumatic valve [ ] And action, because many different pilot pneumatic valve, can be used alone or with several types, makes primary pneumatic valve for water level and water pressure, personal and complex control functions. However, the main similar by the pneumatic valve, pneumatic valve pneumatic valve fully open, the pressure loss is bigger than other pneumatic valves, loss coefficient of each open and full closed position closer, more increased dramatically, more and more big pneumatic valve diameter is more significant.
with the characteristics of pneumatic valves, the pneumatic valve of water prone to accelerate the move to the impact hammer, close to full close, pneumatic valve moves the slower the better, so that the throttle pneumatic valve can be set on the device. Another pilot pneumatic valve and throttle valve setting action to avoid the special part of small diameter hole, in order to avoid congestion. To add a filter, regular maintenance and the rules of the by-pass pipe. Diaphragm type hydraulic pneumatic control valve and piston type classification, the same principle, is than for the power, the forerunner of pneumatic control valve, diaphragm ( The piston) Hydraulic differential operation, the completely automatic regulating downstream water pressure difference, make the main lobe pneumatic valve fully open or fully closed or in the regulation.
when entering the diaphragm ( The piston) Above control room pressure released into the air or water downstream of the low pressure area, the role of the department and at low pressure, pressure value is bigger than former pneumatic diaphragm valve, which will promote the main pneumatic valve fully open position is: when entering the diaphragm ( The piston) At the top of the pressure, because of the import and export, in regulating pneumatic valve, the main state of the pneumatic valve, the pressure of intermediate control indoor, its regulation depends on the needle and catheter system the location of the pneumatic valve, guide joint control function.
the forerunner pneumatic valve can open to the downstream pressure changes or big or small their own small pneumatic valve port, thus changing the diaphragm ( The piston) Pressure above the control room, control the regulation of pneumatic valve plate. Can be used for domestic water, industrial water and fire control system and water supply system. Main pneumatic valve, such as a small table parts material: material parts name
pneumatic valve, pneumatic valve bonnet cast iron, steel, bronze, stainless steel

stainless steel pneumatic valve is carbon steel, stainless steel + NBR
green steel dry aluminum and chromium stainless steel diaphragm

butadiene-acrylonitrile rubber diaphragm plate of carbon steel, stainless steel
stainless steel spring