PZM is the most common diaphragm actuator for our globe type control valves, and it can be assembly Siemens smart positioner, ABB digital positioner, South Korea positioner etc.
The multi-spring membrane pneumatic actuators of P/R type are applied for control operation
of control valves, and other positioning elements in industrial automatic systems. There are
three following design options of the actuator:
APPLICATION AREA
- Direct action (air – advances the steam)
- Reverse action (air – retracts the steam)
- Direct action, handwheel
- Reverse action, handwhee
FEATURES
- Completely reversible action, option to change spring range w/o extra parts.
- Rigid structure of cast yoke.
- Wide range of the available forces.
- Linear relationship between rod displacement and control pressure as a result of using membranes with constant active area.
- Various ranges of spring pressures due to changeability of spring number and /or dislocation of distance fencers.
- Capability of the actuator to incorporate side-mounted handwheel, pneumatic or electro-pneumatic positioners, limit switches, air sets, three-way pneumatic solenoid valves, lockup valves, position transducers.
- High strength of diaphragms, springs and packings.
- Small size and weight.
Direct-acting（ PZMA）
- Up diaphragm castings
- Diaphragm
- Diaphragm plate
- Spring
- Down diaphragm castings
- Actuator stem
- Yoke
- Adjust nut
- Travel indicator
Reverse-acting （ PZMB）
- Up diaphragm castings
- Diaphragm
- Diaphragm plate
- Spring
- Down diaphragm castings
- Actuator stem
- Yoke
- Adjust nut
- Travel indicator
TECHNICAL PARAMETERS
Dimension
pneumatic globe type control valves 2 1 
diaphragm actuator 
diaphragm actuator 1 
diaphragm actuator2 
pzmb2 
double diaphragm actuator
If you need PZM diaphragm actuators, Please just feel free to contact us. Our sales representative will contact you within 1 hour.
