Model & Name:P1(P2)-81211N Series Internal Feedback Direct-operated Piston Regulators

Characteristics:Single seat piston balanced fully enclosedstructure to avoid the coking, concretion and blocking 

of the outside feedbackpressure line, safe and environmental protective with a light and ingeniousstructure;

Wide pressurecontrolled range, convenient adjustment for setting point, reliable for usewith long service life 

and easy maintenance;Especially suitablefor the pressure relief (pressure open), decompression (pressure 

closed)pressure stability control in petroleum industry (i.e., by-pass protection foroil pumps), steam, and high-

rise building (water supply system and firefighting water system).

NominalDiameter (DN): 20~200mm

NominalPressure (PN):1.6、4.0MPa

Pressure Adjusting Range: 300~700 kpa, 600~1500 kpa

MediumTemperature (℃): Soft Seal: -10~+70; for special requirements: -40~+200.

Material:WCB, CF8, CF8M hardseal: Bead welding with STL for plugs and seats.

Flange Standards:JB/T79-94