Excellent Valves for Isolation & Control


CV5700 Relief Valve for Low Pressure

CV5700 Relief Valve for Low Pressure

Valve Type:                                                 Self operated relief valve for low pressure


Valve Nominal Size:                                  DN15 through DN200; 0.5 inch through 8 inch


Pressure Rating:                                         PN16, 40, 63, 100; ANSI Class 150, 300, 600


Regulating Type:                                        Flanged relief valve


Pressure Registration:                              Internal


Flow Characteristic:                                  Linear


Rangeability:                                              20:1


Temperature Range:                                Soft sealing and diaphragm actuator: NBR from -29 to 82 °C;

                  FKM from -8 to 120 °C; SR from -48 to 85 °C; EPDM from -38 to 115 °C


Seat Leakage:                                             Soft sealing ANSI VI


Actuator:                                                     Diaphragm actuator


Accessories:                                                Pressure collection connector, pressure gauge, Pressure collection ball valve

Description & Features


CV5700 self-operated regulator is a direct operated relief valve. Widely applied for low pressure relief system and especially for tank blanketing and reactor service. Pressure proportional control range: from 0.5KPa to 15KPa, the operating temperature down to -48°C and up to 120°C.


Soft sealing: tight shut-off.


No packing: no friction for expected high sensitivity especially under micro pressure regulating, and eliminating potential leak points.


Overload safety: regulators are protected completely while overload pressure is (several to several dozens of times) far higher than the upper limit value of pressure regulating range.


Easy pressure regulating: regulating pressure is easy, quick and convenient by screw style.


Stainless steel actuator: ensure high pressure strength and long service life.


Easy maintenance: top-entry and bonnet centering alignment design reduces maintenance time and manpower requirements; trim parts can be inspected, cleaned and replaced without removing the main valve body from the pipeline.


Universal parts: the parts of whole series self-acting regulators are in common, less need of spare parts.


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