Data Sheet

Bulletin 71.1:67C
4
MATERIALS
TYPE
67C and 67CR 67CF and 67CFR 67CS and 67CSR 67CFS and 67CFSR
BODY AND
SPRING CASE
Aluminum (ASTM B85/Alloy 380) CF8M/CF3M Stainless steel
BOTTOM PLATE 316 Stainless steel - - - - 316 Stainless steel - - - -
PUSHER POST AND
VALVE CARTRIDGE
Polyester resin
UPPER SPRING SEAT Zinc-plated steel 316 Stainless steel
LOWER SPRING SEAT,
DIAPHRAGM PLATE
Chromate conversion coated Aluminum 316 Stainless steel
CONTROL SPRING Plated Steel or Inconel
®
(NACE) Inconel
®
VALVE PLUG
Brass stem with Nitrile (NBR) plug,
AluminumstemwithNitrile(NBR)orFluorocarbon(FKM)plug,
or Stainless steel stem with Nitrile (NBR) plug
316 Stainless steel stem with
Nitrile(NBR)orFluorocarbon(FKM)plug
VALVE SPRING Stainless steel or Inconel
®
(NACE) Inconel
®
DIAPHRAGM
AND O-RINGS
Nitrile(NBR),Fluorocarbon(FKM),orSilicone(VMQ)
(1)
SOFT SEAT AND GASKETS Nitrile(NBR)orFluorocarbon(FKM)
BOLTING, ADJUSTING
SCREW, LOCKNUT
Zinc-plated steel or Stainless steel Stainless steel
HANDWHEEL Zinc-plated steel screw with resin handwheel
FILTER RETAINER - - - - Plated Steel - - - - 316 Stainless steel
FILTER ELEMENT - - - -
Polyethylene,Glassber,
Stainless steel, or
PVDF (Plastic)
- - - -
Polyethylene,Glassber,
316 Stainless steel, or
PVDF (Plastic)
DRAIN VALVE - - - -
Brass or
Stainless steel
- - - -
316 Stainless steel or
18-8 Stainless steel
DRIPWELL - - - -
Aluminum
(ASTM B85/Alloy 380)
- - - - CF8M/CF3M Stainless steel
1. Silicone (VMQ) diaphragm is only available with internal relief (Types 67CR, 67CSR, 67CFR, and 67CFSR).
Inconel
®
is a marked own by Special Metals Corporation.
Table 3. Construction Materials
Internal Relief (Types 67CR, 67CSR,
67CFR,
and 67CFSR)
If for some reason, outside of normal operating conditions,
the downstream pressure exceeds the setpoint of the
regulator, the force created by the downstream pressure
will lift the diaphragm until the diaphragm is lifted off the
reliefseat.Thisallowsowthroughthetokenrelief.The
relief valve on the Type 67CR, 67CSR, 67CFR, or 67CFSR
is an elastomer plug that prevents leakage of air from the
downstream to atmosphere during normal operation, thereby
conserving plant air.
TYPE
CONSTRUCTION FEATURES OPTIONAL FEATURES BODY MATERIAL
With Internal Relief With Filter
Smart Bleed™ Internal
Check Valve Airset
Drain Valve Fixed Bleed Aluminum Stainless Steel
67C X
67CR X X X
67CS X
67CSR X X X
67CF X X X
67CFR X X X X X X
67CFS X X X
67CFSR X X X X X X
Table 2. Available Constructions
Smart Bleed Airset
In some cases, it is desired to exhaust downstream pressure
if inlet pressure is lost or drops below the setpoint of the
regulator. For example, if the regulator is installed on
equipmentthatattimeshasnoowdemandbutisexpected
tobackowonlossofinletpressure.TheType67CFRor
67CFSR can be ordered with the Smart Bleed option which
includes an internal check valve for this application. During
operation, if inlet pressure is lost, or decreases below the
setpoint of the regulator, the downstream pressure will back
owupstreamthroughtheregulatorandcheckvalve.This
optioneliminatestheneedforaxedbleeddownstreamof
the regulator, thereby conserving plant air.