Page 286 - Praxair - Specialty Gases and Equipment Reference Guide

5026 and 5027 Systems

Critical Purity Automatic Switchovers for Non-Corrosive and Corrosive Service

Critical Purity Switchover
The 5026 (Brass) and 5027 (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. Due to pressure differential considerations, a line
regulator is recommended downstream of the system. The
5026/5027 Series may be ordered with the line regulator
installed at the outlet or the line regulator may be ordered
separately for downstream point of use installation. Typically
the 5026/5027 Series are used with one cylinder per side. To
connect more than one cylinder per side, please order manifold
headers separately (see page E •296). The standard models come
with flexible, all stainless steel (Monel lined for Oxygen service) 5026 Series standard assembly (PRS50264131-580)
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pigtails with armor casing. The CGA connection on each pigtail
has a check valve in the gland to prevent contamination and
minimize purging requirements.
Features and Benefits
n Metal-to-Metal Diaphragm n Check Valves in Inlet Gland
Seal Designed to prevent
Reduces possibility of gas contamination and back flow
contamination n Flexible Pigtails
n User Friendly Priority Valve 3' – 316 stainless steel with
One knob switches cylinder armor casing Monel for
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priority oxygen service
Specifications Materials Section E – Gas Handling Equipment
n Maximum Inlet Pressure n Bodies
3000 psig (210 bar) 5026 Series – brass barstock
4500 psig (300 bar) optional 5027 Series – 316 stainless
steel barstock
n Temperature Range
-40 °F to 140 °F n Diaphragms
(-28 °C to 60 °C) 316 stainless steel
n Gauges n Seat
2" diameter PTFE
n Helium Leak Integrity n Filter 5026 Series shown with (Z) isolation and purge valves
1 x 10 scc/sec 10 micron (PRS502631Z71-580)
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n Cv n Internal Seals
.06 PTFE
n Weight
8.25 lb (3.71 kg)
Ordering Information –
Series PRS5026ABCD-CGA (Chrome-Plated Brass Body) and Series PRS5027ABCD-CGA (316L Stainless Steel Body)

A B C D CGA
Switching Pressure Inlet Connections Line Regulator Assembly/Gauges Pigtail
(Priority Right/Left) 0: 1/4" FNPT Ports 0: None 1: Standard Assembly Please specify
2: 70 psig/50 psig 1: Flexible SS Pigtails (36")* 1: 0-15 psig (psi/kPa Gauges) inlet CGA
3: 100 psig/75 psig 2: Manifold Connectors* 2: 0-50 psig 2: Standard Assembly connection
4: 200 psig/170 psig 3: Flexible SS Pigtails (24")* 3: 1-100 psig (psi/Bar Gauges) (if applicable)
5: 470 psig/430 psig 4: Diaphragm Valves with 1/4" FNPT Port 4: 0-250 psig 3: Pressure Switches
7: 150 psig/130 psig 5: Diaphragm Valves with Pigtails (36")* 7: 0-150 psig and Remote Alarm
8. 300 psig/270 psig 6: Diaphragm Valves with Manifold Connectors 4: 600 psi Pressure
(See page E •296 for headers) Switches and
7: Diaphragm valves with Pigtails (24")* Remote Alarm
8: Flexible Teflon-lined Pigtails (36")**
(4500 psig maximum inlet pressure)
9: 1/4" FNPT Ports (4500 psig maximum inlet pressure)
Z: Purge and Isolation Valves
* Pigtails for oxygen service have Monel inner core.
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** 4500 psig maximum inlet pressure.
1-877-PRAXAIR www.praxairdirect.com E•285