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Primary Pressure Regulating Valve / Drain Valve, GD-20RC Series

Primary Pressure Regulating Valve / Drain Valve, GD-20RC Series

Used as a pump relief valve, relieving pressure changes caused by load fluctuations and maintaining a constant pressure inside piping during pump operation.

· Used to prevent fluids in the tube from draining when a pump stops in an open circuit system used in a medium or high-rise building.
· A large pressure detection unit is provided, ensuring a reliable response and cut-off to pressure changes.
· GD-20RC provides excellent corrosion resistance due to Nylon 11 coating treatment performed on the inside and outside of the main body.


Japanese Only

Part Number

Configured Part Number is shown.

Part Number
Part NumberVolume DiscountDays to ShipSupply Side, Nominal Designation of Pipe Flange Denomination B(Denomination A) Control Side Nominal The Pipe Flange B name(A name) Maximum Applicable Pressure Data Primary Pressure
Quote 1/2B(15A)1/2B(15A)0.70.26~0.7
Quote 3/4B(20A)3/4B(20A)0.70.26~0.7
Quote 1B(25A)1B(25A)0.70.26~0.7
Quote 1 1/4B(32A)1 1/4B(32A)0.70.26~0.7
Quote 1 1/2B(40A)1 1/2B(40A)0.70.26~0.7
Quote 2B(50A)2B(50A)0.70.26~0.7
Quote 2 1/2B(65A)2 1/2B(65A)0.70.26~0.7
Quote 3B(80A)3B(80A)0.70.26~0.7
Quote 4B(100A)4B(100A)0.50.26~0.5
Quote 5B(125A)5B(125A)0.50.26~0.5
Quote 6B(150A)6B(150A)0.50.26~0.5


  1. 1

Basic Information

Regulating Valve / Safety Valve Type Water falling prevention valve Applicable Fluid Water / Air / Oil Max. Applicable Pressure(MPa) 0.11~1
Max. Fluid Temperature(℃) 60 Connection Type Equal Dia. Connection Supply Side, Flange Connection Types JIS 10K Flange
Control Side, Flange Connection Type JIS 10K Flange

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