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General Purpose Low Delivery
Pressure Regulators
Series 3700

Description

These regulators were designed to meet the needs of applications requiring reliable lowpressure control of non-high purity gases. They are available in single and two stage versions to meet most non-corrosive gas applications. The low pressure stage has a large sensitive neoprene diaphragm to provide delivery pressures as low as 2" of water.

GENERAL PURPOSE LOW DELIVERY PRESSURE REGULATORS Series 3700

Single Stage Line Regulators for Non-Corrosive Gases

Materials of Construction

Body & Bonnet: Zinc
Seat: Nitrile
Diaphgragm: Natural rubber
Internal parts: Steel, brass, and zinc

Features

  • Extremely low delivery pressures.
  • Large sensitive diaphragm for reliable pressure control.
  • Maximum inlet pressure 250 psig.
  • Needle valve on outlet is standard.
  • Cv = 0.114.

The Series 3700 regulators are available in three delivery pressure ranges; 2-35" of water, and 0.8-2.7 psig and 2.7-5 psig. As a line regulator they have a maximum inlet pressure rating of 250 psig. The inlet and outlet connections of the regulator are 1/4" NPT female, but with the standard needle valve installed the outlet connection is 1/4" NPT male. If you do not desire the outlet valve add suffix "NV" to the part number.

How To Order

Model
Number*		Del. Press. Range
psig		Del. Press. Gauge
psig		Inlet Press. Gauge
psig
3701 2-25" water 0-30" water none
3702 2.7-5 psig 0-10 psig none
3703 0.8-2.7 psig 0-3 psig none

Two-stage General Purpose Regulators
for Low Pressure Delivery

When source gas pressures exceed 250 psig, this hybrid regulator created by coupling a Series 3700 regulator with a Series 2401 single stage regulator is an ideal choice for such higher pressure applications.

Materials of Construction

First Stage See model 2401 on page 20.
2nd Stage See above
Two-stage General Purpose Regulators for Low Pressure Delivery
Model
Number		Del. Press. Range
psig		Del. Press. Gauge
psig		Inlet Press. Gauge
psig
2401HY3701-CGA* 2-25" water 0-30" water 0-4000 psig
2401HY3702-CGA* 2.7-5 psig 0-10 psig 0-4000 psig
2401HY3703-CGA* 0.8-2.7 psig 0.3 psig 0-4000 psig

*Specify CGA connection when ordering. If you do not desire the standard outlet valve add the suffix "NV" to the part number.