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P a r r I n s t r u m e n t C o m p a n y
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O p t i o n a l F i t t i n g s
Valves and Fittings
P
arr stocks and can install
a wide variety of valves
and fittings for use with reac-
tors and pressure vessels.
These include:
• Needle Valves with NPT or
tube connection.
• Regulating Valves with NPT
or tube connection.
• Ball Valves with NPT or
tube connection.
• High Pressure Valves
• Severe Service Valves
• Remote Operating Valves
• Tube Connectors
• Pipe Connectors
• Plugs
• Union Coupling Adapters
Please contact our customer
service department for details.
Manual Control Valves for
Compressed Gas Tanks
T
ank valves with couplings
to fit standard compressed
gas cylinders are available in
stainless steel for corrosive
gases and in nickel plated
brass for non-corrosive gases.
The brass valves have a 2-1/2"
diameter pressure gage which
shows the tank pressure. Both
styles have a 1/4" NPT female
outlet which will accept any
pressure hose or gas tube
assembly. These valves do not
regulate the delivery pressure
of the gas. Pressure regulators
are available on special order.
Safety Check Valves
W
henever gases or liquids
are introduced into a ves-
sel under pressure, the supply
pressure must be greater than
the pressure in the vessel to
prevent reverse flow back into
the supply system. Protection
against reverse flow can be
obtained by installing a check
valve in the supply line. With
a check valve in the line, the
valve will snap shut if the
supply pressure is too low, or
if the pressure in the vessel
should rise above the supply
pressure. This protection
is particularly important on
stirred reactors where gas
enters through a dip tube.
With liquids in the vessel, any
back pressure will force liquid
back into the gas tank or into
the gas supply system.
Parr stocks the poppet
check valves listed above for
incorporation into the user’s
supply lines. These valves
have a 10 psi normal cracking
pressure and are rated for
3000 psi maximum working
pressures. Check valves with
other specifications can be
furnished on special order.
T303 Stainless Steel Valves-No Gage
Fits CGA Tank
Valve No.
Outlet No.
Typical Usage
A120VBPN
510
Propane, butane, ethylene oxide
A120VBPP
660
Chlorine, sulfur dioxide, nitric oxide
Nickel-Plated Brass Valves with Cylinder Pressure Gage
Fits CGA Tank
Valve No.
Outlet No.
Typical Usage
A120VBPQ
320
Carbon dioxide, methyl bromide
A120VBPR
350
Hydrogen, carbon monoxide, ethylene
A120VBPS
540
Oxygen
A120VBPT
580
Nitrogen, argon, helium
A120VBPU
590
Air
Note: Can be furnished with DIN/BSP connections on special order
Poppet Check Valves
Part No.
Material
Connections
363VBAD
Stainless
1/4" NPT (F)
364VBAD
Stainless
1/4" Tube
363VB Check Valve
364VB Check Valve
