Page 273 - Praxair - Specialty Gases and Equipment Reference Guide

4008 Regulators

Special Purpose Regulators for Corrosive Service

Single Stage Anodized Aluminum Barstock Body,
316L Stainless Steel Diaphragm
The 4008 Series regulators are intended for primary pressure
control of mildly corrosive high purity gases such as ammonia,
hydrogen sulfide, and sulfur dioxide or for applications requiring
the light weight of an aluminum body regulator.

Typical Applications
n Semi-corrosive gases and mixtures
n Gas and liquid chromatography
n High purity carrier gases
n Zero, span, and calibration gases
n High purity chamber pressurization

Features and Benefits
n Anodized Aluminum Body n High Purity Diaphragm Seal n Field Adjustable Pressure Limit
Cost-effective corrosion resistance 1.0 x 10 cc/sec helium leak rate Safeguard downstream equipment
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n Front and Rear Panel Mountable n 316L Stainless Steel Diaphragm n Pipe Away Relief Valve
Versatile system configuration No inboard diffusion Safely vent exhausted gases
n Pressure Ranges n Low Wetted Volume
Up to 500 psig Minimal purge requirements

Specifications Materials More Common Gases
n Maximum Inlet Pressure n Body Gas Service Inlet Pressure
3000 psig (210 bar) Anodized aluminum barstock Ammonia 114 psig
n Temperature Range n Bonnet Carbonyl Sulfide 160 psig
-40 °F to 140 °F (-40 °C to 60 °C) Chrome-plated brass barstock Dimethylamine 11.3 psig
n Ports n Seat Hydrogen Sulfide 252 psig
1/4" FNPT PTFE Teflon ® Methyl Mercaptan 15 psig
n Gauge n Internal Seals Monomethylamine 29 psig
2" 316L stainless steel PTFE Teflon ® Sulfur Dioxide 34 psig
n Helium Leak Integrity n Diaphragm Trimethylamine 13.3 psig
1 x 10 cc/sec 316L stainless steel Vinyl Chloride 30 psig
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n Cv n Filter Vinyl Fluoride 355 psig
0.08 10 micron Vinyl Methyl Ether 28 psig
n Weight Mixture <3000 psig
3.5 lb
Section E – Gas Handling Equipment
Ordering Information – Series PRS4008ABCD-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 CGA
2: 0-50 psig 30"-0-100 psig 3: 0-4000 psig 1: 1/4" MNPT 1: Standard Assembly
3: 0-100 psig 30"-0-200 psig 5: 0-1000 psig 2: 1/4" Tube Fitting (psi/kPa Gauges)
4: 0-250 psig 0-400 psig 6: 0-300 psig 3: Diaphragm Valve 1/4" Tube Fitting 2: Standard Assembly
5: 0-500 psig 0-1000 psig 7: 0-400 psig 4: Diaphragm Valve 1/4" MNPT (bar/psi Gauges)
7: 0-150 psig 30"-0-200 psig 5: Needle Valve 1/4" MNPT
6: 1/8" Tube Fitting
7: 3/8" Tube Fitting
8: Diaphragm Valve 1/8" Tube Fitting
9: Diaphragm Valve 1/4" FNPT

Option Part Number Description
Panel Mount Kit PRS5500002T To mount the regulator using threads on the bonnet.
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.
Protocol Station Add Letter “M” after CGA See page E •281 for details
Protocol Switchover Station Add Letter “C” after CGA See page E •282 for details
Protocol Switchover Station with Alarm Add Letter “G” after CGA See page E •283 for details
Protocol Alarm Station Add Letter “A” after CGA See page E •283 for details
Deep Purge Add Letter “D” after CGA See page E •279 for details

E•272 1-877-PRAXAIR www.praxairdirect.com