Page 250 - Praxair - Specialty Gases and Equipment Reference Guide

4025 Regulators

Critical Purity Regulators for Corrosive Service

Line Regulator, Single Stage 316 Stainless Steel
Barstock Body, 316 Stainless Steel Diaphragm
The 4025 Series regulators are intended for secondary
pressure control of critical purity and corrosive gases. It is
recommended as a point of use pressure control in critical
purity gas delivery systems.

Typical Applications
■ Bulk gas delivery systems ■ High purity chamber
■ Gas and liquid chromatography pressurization
■ Ultra high purity carrier gases ■ Liquefied hydrocarbon
gas control
■ Zero, span, and calibration
gases ■ Control of cryogenic gases

Features and Benefits
■ 316 Stainless Steel ■ Outlet Pressure Ranges ■ Metal-to-Metal Diaphragm ■ Low Wetted Volume
Barstock Body 0-15 to 0-500 psig Seal Minimal purge requirements
Enhanced corrosion resistance Broad range of applications Reduces possibility of gas ■ Pipe Away Relief Valve –
contamination
■ Front and Rear Panel ■ 3000 psig Inlet Pressure 1/4" FNPT
Mountable Rating ■ 316 Stainless Steel Safely vent exhausted gases
Versatile system configuration Safe use with high Diaphragm ■ Delivery Pressure Range
Rear mount 10-32 UNF (2) pressure cylinders No inboard diffusion Easily Changed
Maximum flexibility

Specifications Materials
■ Maximum Inlet Pressure ■ Helium Leak Integrity ■ Body ■ Filter
3000 psig (210 bar) 1 x 10 scc/sec 316 stainless steel barstock 10 micron 316 stainless steel Section E – Gas Handling Equipment
-9
■ Temperature Range ■ Cv ■ Bonnet ■ Diaphragm
-40 °F to 165 °F 0.1 (maximum outlet 316 stainless steel barstock 316 stainless steel
(-40 °C to 74 °C) 50 psig or below) ■ Internal Seals
0.2 (maximum outlet ■ Seat ® ®
■ Gauges PFA Teflon Teflon
2" diameter stainless steel above 50 psig)
■ Weight
■ Ports
1/4" FNPT 2.25 lb (1.0 kg)
Ordering Information — Series PRS4025ABCD-CGA Highlighted selection indicates most popular model

A B C D CGA
Outlet Pressure Outlet Gauge Inlet Gauge Outlet Assemblies Assembly/Gauges Inlet Connections
1: 0-15 psig 30"-0-30 psig 0: None 0: 1/4" FNPT Port 0: Bare Body 000: 1/4" FNPT
2: 0-50 psig 30"-0-100 psig 1: 1/4" MNPT 1: Standard Assembly TF2: 1/8" Tube
3: 0-100 psig 30"-0-200 psig 2: 1/4" Tube Fitting (psi/kPa Gauges) TF4: 1/4" Tube
4: 0-250 psig 0-400 psig 3: Diaphragm Valve 1/4" Tube Fitting 2: Standard Assembly TF6: 3/8" Tube
5: 0-500 psig 0-1000 psig 4: Diaphragm Valve 1/4" MNPT (bar/psi Gauges) TF8: 1/2" Tube
7: 0-150 psig 30"-0-200 psig 5: Needle Valve 1/4" MNPT 4: Cleanroom Assembly
6: 1/8" Tube Fitting (psi/kPa Gauges)
7: 3/8" Tube Fitting 5: Cleanroom Assembly
8: Diaphragm Valve 1/8" Tube Fitting (bar/psi Gauges)
9: Diaphragm Valve 1/4" FNPT

Option Part Number Description
Panel Mount Kit PRS5500002T To mount the regulator using threads on the bonnet.
Wall Mount Kit PRSSMLR-1 To mount regulator to wall
Captured Vent – Standard Equipment PRSSG6705 For easy piping of vented gases to a safe location in the event
3000 and 4000 1/16" FNPT of diaphragm failure.
Helium Leak Certification PRS4760002 Inboard helium leak certification to less than 1 x 10-8 scc/sec
Reversed Inlet/Outlet Configuration Contact your Praxair representative Inlet and outlet ports supplied in a reversed (“mirror image”) configuration

1-877-PRAXAIR www.praxairdirect.com E•249