Page 287 - Praxair - Specialty Gases and Equipment Reference Guide

5028 Gas Delivery System

High Purity Automatic Changeover for Non-Corrosive and Corrosive Service

High Purity Automatic Changeover System
The 5028B (Brass) and 5028S (316 Stainless Steel)
Series high purity automatic changeover 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
comes standard. Typically the 5028B/5028S Series
are used with one cylinder per side. To connect more
than one cylinder per side, please order manifold head-
ers separately (see page E •296). The standard models
come with flexible, all stainless steel (Monel lined for
®
oxygen service) 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 High Purity Diffusion n User Friendly Priority Valve n Check Valves in Inlet Gland n Modular Construction
Resistant Regulators One knob switches cylinder Designed to prevent Allows for easy installation,
Minimize the diffusion priority contamination and back flow modular design for a smaller
of air, no possibility of gas foot print
contamination n Flexible Pigtails
3' – 316 stainless steel with
armor casing Monel for
®
oxygen service
Specifications Materials
n Maximum Inlet Pressure n Cv n Bodies n Filter
3000 psig (210 bar) 0.06 5028B Series: Chrome-plated 10 micron
Gauge: 0-4000 brass barstock
Ports: 1/4" FNPT n Helium Leak Integrity 5028S Series: 316 stainless n Friction Sleeve
1 x 10 scc/sec
Outer – Teflon
-7
®
n Temperature Range n Weight steel barstock Inner – Teflon ®
-40 °F to 165 °F 7.75 lb (3.71 kg) n Diaphragms/Spring
(-40 °C to 74 °C) 316 stainless steel
n Line Regulator
n Gauges Brass: PRS3004 n Valve Seat
2" diameter brass or (see page E •252) Teflon ®
Section E – Gas Handling Equipment
stainless steel Stainless steel: PRS3024
(see page E •255)
Ordering Information — Series PRS5028-ABC-CGA (Brass or 316L Stainless Steel)
A B C CGA
Material of Construction Line Regulator Outlet Outlet Gauge Assembly Pigtail
B: Brass 0: 0-25 psig 30"-0-60 psig 0: Standard Assembly Please specify
S: Stainless Steel 1: 0-50 psig 30"-0-100 psig 1: With Alarm CGA
2: 0-100 psig 30"-0-200 psig
3: 0-150 psig 30"-0-200 psig

Option Page Number
Tube Fittings E •380 - E •381
Header Manifolds E •296

E•286 1-877-PRAXAIR www.praxairdirect.com