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High Purity Low Delivery Pressure Regulators
Series 3700HP

Description

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

HIGH PURITY LOW DELIVERY PRESSURE REGULATORS Series 3700HP

Single Stage Line Regulators for Non-Corrosive Gases

Materials of Construction

Body & Bonnet: Zinc
Seat: Nitrile
Diaphgragm: Aluminum-faced natural rubber
Internal parts: Steel, brass, and zinc

Features

  • Extremely low delivery pressures.
  • Aluminum faced diaphragm for high purity applications.
  • Maximum inlet pressure 250 psig.
  • Diaphragm packless valve on outlet is standard.
  • Cv = 0.114.

The Series 3700HP 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. Inlet and outlet connections are 1/4" NPT female. The Series 3700HP has an aluminum faced natural rubber diaphragm to provide a diffusion resistant metal barrier for high purity gas applications. If you do not desire the outlet valve ad suffix "NV" to the part number.

How To Order

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

Two-stage High Purity Regulators for
Low Pressure Delivery

When source gas pressures exceed 250 psig, this hybrid regulator created by coupling a Series 3700HP regulator with a Series 3101 single stage regulator is an ideal choice for such higher pressure applications.

Materials of Construction

First Stage See model 3101 on page 4
2nd Stage See above
Two-stage High Purity Regulators for Low Pressure Delivery
Model
Number		Del. Press. Range
psig		Del. Press. Gauge
psig		Inlet Press. Gauge
psig
3101HY3701-CGA* 2-25" water 0-30" water 0-4000 psig
3101HY3702-CGA* 2.7-5 psig 0-10 psig 0-4000 psig
3101HY3703-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.