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  • Literature


The differential pressure regulator eliminates excessive pump head pressure, when most radiator valves are closed due to reduced demand, by controling flow through a bypass line when the difference between supply/return exceeds the setpoint.


  • Install between supply and return sides of a hydronic system to stabilize pressure differential and reduce the effects of demand changes.
  • Control maintains a constant differential between the two sides by opening a bypass whenever the difference between supply and return reaches the setpoint.
  • Provides silent, trouble-free service.
  • Easy installation; requires no electrical hookup.
  • Easy adjustment of pressure by turning regulating cap.
  • Built-in differential pressure indicator.
  • Brass valve body with thermoplastic and stainless steel parts.
  • Diaphragm of EPDM.

Product Specifications

Dimensions (in.)
8 1/2 in. high x 4 1/4 in. wide
Dimensions (mm)
213 mm high x 109 mm wide
Built-in differential pressure indicator
Operating Temperature Range (F)
230 F Maximum
Operating Temperature Range (C)
110 C Maximum
Connection Type
Angle type, female threaded NPT
395,000 Btu/hr; 50 gpm
Pipe Size (inch)
1 1/4 in.
Pipe Size (DN)
Valve Type
Pressure Regulating Valve
Materials (Body)
Brass (body), Stainless steel and engineered thermoplastics. EPDM diaphragm.
Outlet Pressure Adjustment Range (psi)
0-17 psi
Max. Inlet Pressure Rating (psi)
85 Psi
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