How do pilot operated pressure regulators work?
A small pilot regulator spring-loaded or air-loaded senses upstream or downstream pressure and controls a larger main valve via a dome chamber. When the pilot opens at set pressure, it vents the dome pressure and allows the main valve to modulate flow to maintain accurate control under large pressure drops or variable flow conditions.
Advantages of pilot operated pressure regulators...
• Handles high pressure drops & large flows
• Excellent pressure stability & accuracy
• Compact design for high capacity
• Works for upstream or downstream control
• Remote‑mountable pilot for flexibility
• Tight shut‑off for safety
• Excellent pressure stability & accuracy
• Compact design for high capacity
• Works for upstream or downstream control
• Remote‑mountable pilot for flexibility
• Tight shut‑off for safety
Technical Parameters:
Pressure Ratings
PN16, PN25, PN40, PN64, PN100, CL150, CL300, CL600, CL900, CL1500, CL2500 Covers up to ANSI Class 2500 / 600 lb and DIN PN100 systems normally used in high-capacity steam or gas control
Temperature Range
Typical operation up to 425 °C; some models using high-temperature diaphragms and materials allow service up to 550 °C especially for steam applications
Size Range
DN20–DN100 (½"–4"); pilot + main designs support flows equivalent to much larger Cv values. Larger custom units available for high-capacity steam systems.
Materials
Carbon steel (e.g. WCB, ductile iron bodies), stainless trim, phosphor-bronze diaphragm for steam, optional EPDM or graphite seals for higher temperatures. Stellite overlays on seat/plug for wear resistance in steam/gas media
Industry Application:
Oil & Gas
Power
Media Type:
Water
Gas
Steam
Oil
Chemicals
