Pneumatic Proportional Control Valve
A pneumatic proportional control valve is an automatic valve that continuously adjusts its opening in response to a signal from a control system (PLC, temperature or pressure controller) to maintain flow at the desired value. The diaphragm or piston actuator powered by compressed air provides high force and rapid response; the electropneumatic positioner converts the 4–20 mA signal to precise valve position.
Available in 2 and 3-way linear globe type for steam and hot oil, and AISI 304 segment (V-port) type for muddy and viscous fluids. Supplied in grey cast iron, ductile iron, carbon steel and stainless steel body options, ranging from DN15 to DN150, in PN16 and PN40 pressure classes.
Advantages
- Precise and continuous flow control
- High force and rapid response with compressed air
- Safe position on air loss (spring-loaded actuator)
- 2 / 3-way and segment type options
Applications
- Steam heating and heat exchanger control
- Hot oil systems
- Process temperature and pressure control
- Chemical and food facilities
Technical Specifications
| Nominal diameter | DN15 – DN150 |
|---|---|
| Pressure class | PN16 / PN40 |
| Valve type | 2 / 3-way globe or segment (V-port) |
| Actuator | Pneumatic diaphragm or piston |
| Control signal | 4–20 mA (electropneumatic positioner) |
Materials
| Body | Grey cast iron, ductile iron, carbon steel or stainless steel |
|---|---|
| Internal components | Stainless steel |
| Actuator | Steel / aluminium, elastomer diaphragm |
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