Page 275 - Praxair - Specialty Gases and Equipment Reference Guide

170 and 3028 Regulators

Special Purpose Regulators

170 Regulator – Low Pressure Line Regulator
The 170 Series regulators are designed to provide sensitive and
accurate pressure control of non-corrosive gases at low pressure.
The large rubber diaphragm delivers a steady flow at pressures
below 10 psig. The 2-1/2 inch delivery pressure gauge makes
outlet pressure setting easy and accurate. The pressure adjusting
screw is protected by a plastic cap to prevent accidental changes
of pressure setting.
Specifications
n Maximum Inlet Pressure n Maximun Flow (air):
250 psig PRS1701 – (360 cfm)
PRS1702 – (550 cfm)
n Temperature Range
-40 °F to 160 °F n Inlet and Outlet Connections
(-40 °C to 71 °C) 1/4" MNPT
Materials
n Body n Nozzle
Die cast zinc Brass
n Diaphragm n Gauge
Buna-N 2-1/2" chrome plated brass
n Seat/Seal n Outlet
Neoprene Brass needle valve
Ordering Information
Part Number Delivery Pressure Delivery Pressure
Ranges Gauge
PRS1701-CGA 0.5-8 psig 0-10 psig
PRS1702-CGA 5-10 psig 0-15 psig

3028 Regulator – Economy Corrosive Regulator
The 3028 Series is a compact regulator for use with most
corrosive gases sold in lecture bottles.

Typical Applications
Section E – Gas Handling Equipment
n For use with delivery pressures requiring 1-6 psig
Specifications
n Maximum Inlet Pressure n Ports
3000 psig 1/4" FNPT
n Temperature Range n Maximum Flow Rate
30 °F to 120 °F @ 2000 psi N 2
(-1 °C to 49 °C) Model 3028-1: 500 sccm
Model 3028-2: 90 scfh
n Gauges
1-1/2" and 1-1/8" diameter
stainless steel
Materials
n Body n Bonnet
Polyvinyl Chloride Polyvinyl Chloride
n Seat/Seals n Diaphragm
Kel F/Teflon ® Teflon ®
Ordering Information
Model Number Delivery Pressure Delivery Pressure
Range Gauge
PRS3028-1 0-18" water column None
PRS3028-2 0-6 psig 0-15 psig

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