Cast pressure seal gate valve, wedge or flat gate, OS&Y, bolted
Material of pressure seal gate valve:
Size of pressure seal gate valve: 2inch(DN50) - 20 inch (DN500)
Pressure of pressure seal gate valve: 900LB(PN150)-2500LB(PN420)
Connection type: Flange(RF,RTJ) BW,SW.
Kind of drive : Wrench,Gear,Electric actuators and pneumatic
Operating temperature : -100℃ - 400℃
Working medium : water, gas,oil,Sulfuric acid and hydrochloric acid
The open-close part name is gate,that this cast steel gate valve
only can fully open or fully closed, they can not adjust the
flow,the gate have two sealing face and the sealing face are wedge
type,the gate also have two type according to interior
structure,one is solid gate ,anther is flexible gate, the advantage
of flexible gate is that it will not be stuck when being fastened
between gate and seat. te maket of the flexible gate valve is
bigger than other gate valves.
The difference between pressure seal gate valve and others cast
steel gate valve depending on pressure from medium to finished the
sealing of the valve stem .thus eliminate the medium leakage out
.so they usually used on important place.
We can divided into two types according to structure of the gate,
one type is wedge gate valve, anther type is flat gate valve,wedge
gate valve is mean the sealing face of the gate is wedge type(it
have angle between them),flat gate valve is mean the sealing face
of the gate is parallel type,wedge gate valve must rely on exogenic
action to mechanical seal,but flat gate valve can rely on pressure
of the medium to seal. so teh wedge gate valve have the bigger
market than flat gate valve.
Advantage for the pressure seal gate valve
All of the gate valve are full bore,so they have the very small
fluid resistance and the sealing face is very resistant to shock
The flow of medium is not restricted when valves are installed in
the pipeline.they have simple structure and have the short face to
face.so the price is lower than ball valve.
The pressure seal gate valve usually used for the highest piping
line,their characteristic are higher pressure can be
make a better sealing effect,so no any medium can leakage out from
pressure seal gate valve on any time.
Matters needing attention during installation
The workers must clean up the impurities in the piping and valves
before the gate valve installed on the piping line.