Robinet à tournant sphérique de type wafer vanne à action rapide

Pneumatic actuator

1.Double acting   2.single acting

Pneumatic accessories

Limit switch,positioner,solenoid valve,filter relief-pressure valve,hand wheel-operated.

Nominal diameter

DN15-DN150

Nominal pressure

1.6-4.0MPa

Applicable temperature

PTFE:-30~180°C PPL:-30~250°C

Body material

304,316,316L,WCB

Disc material

304,316,316L,WCB

Seat lining

PTFE,PPL

Applicable medium

Gas,steam,water,oil,etc.

Double acting pneumatic actuator working principle:

1. Compressed air access into A holes, then the piston separates;
2. So that the drive shaft anticlockwise, valve open;
3. Air remove from B hole;

 1.    Compressed air access into B holes,  

        then the piston will be closer;

2.     So that the drive shaft clockwise, valve close;

3.     Air remove from A hole;

Single acting pneumatic actuator working principle:

1. Compressed air access into A hole, then the piston will be separates;
2. Spring will be stressed, so that the drive shaft anticlockwise, valve open;
3. Air remove from the B hole;

1.  Air remove from the A hole;

2.  Compression spring moves the pistons closer;

3.  Driven shaft clockwise;

4.  Air into from the B hole;