FLOW
OUTLET
(See Table)
2 9/32"
3/4" NPT
5 1/4"
* SEAT
1 3/4"
HANDLE -
998601
3/4" NPT (Female)
(either
FLOW
direction)
SPRING *
BALL *
both ends
2 5/8"
(See Table)
CHECK VALVE
*Supplied with CV Repair Kit - 18360
Part No. 639674
Check Part
Valve No. Outlet Connection
CV-1 639677 CGA-024 7/8—14 RH male)
CV-2 639710 CGA-025 (7/8—14 LH male)
CV-3 639706 CGA-022 (9/16—18 RH male)
CV-4 639711 CGA-023 (9/16—18 LH male)
CV-5 639717 1/2-in. NPT (male)
CV-6 639719 CGA-034 (7/8—14 RH female)
CV-7 639720 CGA-032 (5/8—18 RH female)
V-53 SHUTOFF VALVE
V-53 Shutoff Valve Only
V-53/Check Valve Combination
CAPACITY DATA: V-53/CHECK VAL VE
Pressure Nitrogen *Flow Rate (cfh) at Inlet Pressure of:
Drop
(psi) 5 psig 10 psig 15 psig 50 psig 100 psig 200 psig
1 1450 1650 1800 2700 3550 4800
2 2000 2250 2500 3800 5100 7000
3 — 2700 3000 4600 6100 8300
5 — — — 5800 7500 10000
1 150 160 175 260 350 470
2 370 410 425 690 920 1250
3 — 610 670 1000 1350 1800
Acetylene 1.03 Hydrogen 3.68
Air 0.97 Methane or Natural Gas 1.31
Argon 0.83 Oxygen 0.92
Carbon dioxide 0.79 Propane 0.79
Helium 2.61
5 — — — 1550 2100 2850
* For other gases, multiply the given nitrogen flow rate by the following correction factors:
NOTE: Piped or distributed acetylene pressure should never exceed 15 psig.
F-12-542-E 7/95 1M
July , 1995
V-53 SHUTOFF VALVE & CHECK VALVES
INSTRUCTIONS for F-12-542-E
Cap & Chain
V-53/Check Valve Gas Check Valve Assembly
Combination Part No. Service Outlet Connection (Accessory)
V-53/CV-1 639767†† Oxygen CGA-024 (“C”-size RH male) 951506
V-53/CV-2 639768 Fuel Gas CGA-025 (“C”-size LH male) 951507
V-53/CV-3 998314†† Oxygen CGA-022 (“B”-size RH male) 86W40
V-53/CV-4 998316 Fuel Gas CGA-023 (“B”-size LH male) 86W41
V-53/CV-5 639769 * 1/2-in. NPT (male) —
ment. If they are used for oxygen service, do NOT use oil or grease since
they ignite easily and burn violently under pressure in the presence of
oxygen. If pipe adaptors are necessary, be sure they are thoroughly degreased.
gas station outlets, will comply with the latest NFPA-51 and OSHA requirements.
Note that check valves are not designed for stopping flashbacks. Check valves
only prevent backflow of one gas from mixing in the pipeline with the other. Only
hydraulic back-pressure valves should be used for flashback protection.
before making pipe connection. Tighten all connections firmly with a wrench.
valve can be installed to the pipe. After installing V-53/check valve, make sure
the V-53 valve is closed (handle pointing out or perpendicular to the valve) be-
fore turning on the main gas supply.
for an instant to blow away any dust or dirt that may have collected on the outlet.
Never crack a fuel gas valve near sparks, flames, or any possible source
of ignition. Be sure to follow all instructions packed with your station regulator.
other solution suitable for oxygen service. If leakage is detected, release pres-
sure and correct.
Replace check valve or parts shown, on the reverse side of this sheet if there is
V-53/CV-6 998442 Inert Gas CGA-034 (“C”-size RH female) —
non-assembled.
V-53/CV-7 998227 Inlet Gas CGA-032 (“B”-size RH female) —
* Any common non-corrosive, non-toxic industrial gas. (See note 2 below.)
†† Supplied with check valve assembled and sealed to shutoff valve. All others are supplied
1. Operating pressure must NOT exceed 200 psig.
2. All V-53 valves and check valves are cleaned for oxygen service before ship-
3. The V-53 valve/check valve combination, when installed on oxygen and fuel
4. Apply a single turn of 3/8-in. or 1/2-in. wide Teflon tape on all male pipe threads
5. The V-53 valve can accept flow from either direction, therefore, either end of the
6. Before attaching station regulator to check valve outlet, crack the valve slightly
7. Check the installation for leakage using Leak Test Solution (998771 ) or any
leakage.
Be sure this information reaches the operator.
8. Periodically test the check valve for leakage using the reverse flow procedure.
You can get extra copies through your supplier .
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