"Our strength is in providing valves of high quality with timely delivery, at competitive rates"   PNEUMATIC VALVES (WEIR AND STRAIGHT THROUGH)    Reverse acting actuated Diaphragm valve (Air to open, spring to close, DOPO):  This actuator is designed to operate from a normally closed position. Air pressure on  the bottom side of the actuator diaphragm opens the valve. This air pressure will lift  and hold the diaphragm valve in a partially or fully open position until the air is  released and the spring closes the valve. (Air failure valve closes) View Large View Large   View Large View Large  Double acting Diaphragm Valve:  The air chamber in this double acting actuator are usually controlled by a single 4-way  solenoid operated valve which admits air into one chamber while exhaust air from the  other side of chamber, either opening or closing the valve depending on the air  connections.Unlike spring apposed diaphragm actuator where major part of the stem  thrust is absorbed by the spring, full thrust depending on the air supply pressure is  available as net thrust for operating the valve.The fail-safe operation for double acting  actuator can be stay put by using air lock.Double acting actuator can be operated by  conventional 3-way solenoid valve by providing a constant air pressure loading on the  other side of the air chamber.    Double diaphragm actuator:  Particularly with fluid pressure at both ends (0%). The largest size Diaphragm Valves  requires tremendous amount of thrust to close the valve. Actuator as large as 300 sq.  in. effective area might not be adequate. Battery of two or three actuators are  combined  to achieve the desired thrust. View Large   <<Back | More>>     PNEUMATIC VALVES   MANUAL VALVES   LININGS FOR VALVES   PRODUCTS       HOME CONTACT US FEEDBACK Profile | Products | Quality | Clients | Consultants This site best veiwed in Internet Explorer 5.0 or Netscape 4.5 or above in a resolution of 800x600 All contents copyrights reserved,Procon Engineers, All rights reserved.