Page 378 - Praxair - Specialty Gases and Equipment Reference Guide

Accessories

Diaphragm and Miniature Needle Valves

533 Series Diaphragm Valves
The 533 Series diaphragm valves are Specifications
ideal for use as the primary flow control n Maximum Inlet Pressure
in high purity or corrosive gas systems. 3500 psig
Springless design and low wetted sur- n Temperature Range
o
o
o
o
face area combine to minimize particle -40 F to 140 F (-40 C to 60 C)
generation and the completely swept n Helium Leak Integrity
1 x 10 scc/sec
-8
path minimizes entrapment. The unique
design of the 533 Series allows low n Cv
0.17
torque operation with gas flow in either n Weight
direction. Flow control is accomplished 0.66 lb (0.3 kg) 533 Series
with the multi-turn model while the Diaphragm Valve
1/4 turn model is quick acting and
indicates on/off position.
Materials Ordering Information – Series PRS533ABC
n Bodies and Fittings A B C
Brass barstock or
316L stainless steel Flow Control Material Inlet Connections
0: Multi-Turn 2: Brass 0: 1/4" FPT x 1/4" FPT
n Diaphragms
Elgiloy ® 1: 1/4 Turn 4: 316L Stainless Steel 2: 1/4" Tube x 1/4" Tube
9: Chrome-Plated Brass 3: 1/4" MPT (Extended Leg) x 1/4" Tube
n Seats 4: 1/4" MPT x 1/4" MPT
KEL-F ® 8: 1/4" MPT (Extended Leg) x 1/8" Tube
n Seals 9: 1/4" MPT (Extended Leg) x 1/4" FPT
Metal to metal For example, a PRS533140 is a bare body, 316L stainless steel diaphragm valve controlled by a 1/4 turn handle.

500 Series Miniature Section E – Gas Handling Equipment
Needle Valves
The 500 Series miniature needle valves Specifications
are forged from brass, 316L stainless n Maximum Inlet Pressure
steel, or Monel . They are designed 3000 psig (210 bar)
®
for fine flow control in a variety of n Temperature Range
o
o
applications in the chemical process -65 F to 450 F (-54 C to 232 C)
o
o
and petroleum industries, as well as n Weight
0.7 lb (0.3 kg)
laboratories and hospitals. The ground
and polished stem and Teflon packing
®
make them suitable for controlling the Materials
flow of liquids or gases from vacuum n Bodies and Fittings
Brass barstock or 316L stainless steel
to 3000 psig.
n Diaphragms 500 Series
Elgiloy ®
n Seats
KEL-F ®
n Seals
Metal to metal
Ordering Information – Series 500
Part Number End Fittings Body Stem Packing
PRS5500067 1/8" MPT x 1/8" MPT Forged Chrome-Plated Brass 303 Stainless Steel Teflon /Chrome-Plated Brass
®
PRS5339002 1/4" MPT x 1/4" MPT Forged Brass 303 Stainless Steel Teflon /Brass
®
PRS5553225 1/4" MPT x 1/4" MPT Forged Chrome-Plated Brass 303 Stainless Steel Teflon /Chrome-Plated Brass
®
PRS5339304 1/4" MPT x 1/4" MPT Forged 316 Stainless Steel 316 Stainless Steel Teflon /316 Stainless Steel
®
PRS5339408 1/4" MPT x 1/4" MPT Forged Monel Monel Teflon /Monel ®
®
®
®
PRSSG5434 1/4" MPT x 1/4" MPT Brass Angle 303 Stainless Steel Teflon /Brass
®
PRSSG5425 1/4" MPT x 1/4" MPT Stainless Steel 316 SKtainless Steel Teflon /Stainless Steel
®
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