Page 285 - Praxair - Specialty Gases and Equipment Reference Guide

Gas Delivery Systems

Critical Purity Automatic Switchovers for Non-Corrosive and Corrosive Service

5022 and 5023 Critical Purity Switchover
The 5022 (Brass) and 5023 (316 Stainless Steel) Series high purity
automatic switchover systems are designed to provide continuous
supply of high purity gases to the laboratory, process or instrument.
The system automatically changes cylinder or bank priority from
primary to reserve with no fluctuation in line pressure to provide a
continuous, uninterrupted supply of gas to the process, laboratory
or instrument. Each system may be ordered with internal pressure
switches and a power supply/remote alarm to provide both local
and remote indication of bank status. For use with flammable gases
or in hazardous locations (class 1, division 1, groups A, B, C, or D)
optional intrinsic safety barriers are available. A second option is a
telephone dialer which will signal when a bank is empty. For handling
toxic or poisonous gases, the 5023 Series is available with optional
captured venting.

Features and Benefits

n Integral Line Regulator n Metal-to-Metal Diaphragm n User Friendly Priority Valve n Intrinsic Safety
Stable line pressure during Seal One lever switches Safe use with flammable gases
cylinder changeout No possibility of gas cylinder priority
contamination
n Check Valves in Inlet Gland
Designed to prevent
contamination and back flow
Specifications Materials
n Maximum Inlet Pressure n Inlet Connection n Line Regulator n Check Valves
3000 psig (210 bar) 1/4" FPT 5022 Series: brass barstock 5022 Series – Brass with
5023 Series: 316 SS barstock Viton seals
®
n Temperature Range n Outlet Connection
-40 °F to 165 °F 3/8" NPTF n Diaphragms 5023 Series – 316 stainless
®
316L stainless steel steel with Viton seals
n Gauges n Helium Leak Integrity
Brass, bronze and 2 x 10 scc/sec n Seats n Internal Seals
-8
stainless steel n Weight PTFE and CTFE PTFE
n Maximum Flow (Nitrogen) 40 lb (18 kg) n Tubing n Pressure Switch
1200 scfh n Dimensions 316 stainless steel 5022 Series – Brass
n Relief Valve 12"W x 15.75"H x 9"D n Pigtails 5023 Series – 316 stainless steel
3/8" pipe away (30.5 x 40 x 23 cm) 316L stainless steel, n Enclosure
Section E – Gas Handling Equipment
armor jacketed Acrylic powder-coated steel
Nema 4x
Ordering Information – Series PRS5022ABCD-CGA (Brass) and Series PRS5023ABCD-CGA (316 Stainless Steel)
A B C D CGA
Outlet Pressure Inlet Connections Cylinder/Side Assembly Pigtail
2: 0-50 psig 0: 1/4" FNPT for Non-Toxic Gases 0: No Inlet Connection 1: Without Pressure Switches Please Specify
3: 0-100 psig 1: Manifolds for Non-Toxic Gases 1: One Cylinder 2: With Remote Alarm (110 VAC) inlet CGA
5: 0-350 psig (36" flexible pigtails at each station) 2: Two Cylinders 3: With Remote Alarm (220 VAC) connection
7: 0-150 psig 3: Diaphragm Valves for Non-Toxic 3: Three Cylinders 4: Without Remote Alarm* (if applicable)
Gases* (Two 36" flexible pigtails) 4: Four Cylinders 5: With Remote Alarm (110 VAC)
4: Manifolds for Non-Toxic Gases 5: Five Cylinders and Intrinsic Safety Barriers
(24" flexible pigtails at each station) 6: Six Cylinders 6: With Remote Alarm (220 VAC)
5: SS Manifolds for Toxic Gases** 7: Seven Cylinders and Intrinsic Safety Barriers
(36" flexible pigtails at each station) 8: Eight Cylinders 7: Without Remote Alarm With
7: SS Manifolds for Toxic Gases** 9: Nine Cylinders Intrinsic Safety Barriers*
(24" flexible pigtails at each station)
8: Diaphragm Valves for Toxic Gases** * Requires system with alarm
(Two 36" flexible pigtails) Note: All assemblies (except
9: Diaphragm Valves for Non-Toxic Gases* number 1) include pressure
(Two 72" flexible pigtails) switches
* One cylinder/side only
** Includes captured vent

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