Dual flow rate valve
Dual isolation valve with rectangular flow passageways
Dual lift system
Dual occlusion valve ensuring absolute sealing off
Dual pilot manifold assembly for a safety relief valve
Dual pilot manifold assembly for a safety relief valve
Dual plate check valve
Dual safety valve
Dual seal brake control valve
Dual seal valve
Dual sealing element valve for oil well pumps and method of...
Dual segment ball valve
Dual snap action for valves
Dual stage hydraulic actuator for expanding gate valve
Dual threaded gas valve adapted for its connection to a...
Dual valve pressure relief device
Dual-inlet selective flow regulating valve
Duckbill conservation vent valve
Duckbill valve
Duckbill valve with crescent shaped lips