Model 3631

Model 3631 constant flow regulator comes with a choice of an AISI 316 stainless steel or aluminum body. It is a sturdy, industrial constant flow regulator.

It is designed to provide a constant flow of liquids in applications where supply or backpressure varies and to provide a constant flow of gases in applications where backpressure varies. It is a membrane type differential pressure controller with alarm function. It is supplied with Model L variable area flow meter for flow rate indication and setting.

Typical applications are water purging for instruments, gas purging in Δp measurements, and hydrostatic density measurements.

Technical Data
Body AISI 316 or aluminum
Spring AISI 316
Membrane EPDM
Plate Nylon (PA 6) (*PVDF)
Seals Nitrile (*Viton, EPDM)
Connections NPT 1/4” (G 1/4”)
Maximum flow, H2O 1.5 LPM
Maximum flow, air 60 NLPM / 6 barg
Maximum differential pressure 10 bar
Maximum static pressure 20 bar
Minimum required pressure drop 2 bar
Maximum temperature 75°C (*80°C)
Installation position Vertically
Weight 1.2 kg AISI 316 body / 0.6 kg aluminium body
*Special construction on request

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