Advertisement
WARNING
Explosion Hazard And Electrical Shock Hazard.
Can cause explosion, serious injury or death.
1. Turn off gas supply before starting installation.
2. Disconnect power supply for valve actuator before
beginning installation.
3. Install the valve so the arrow on the valve body
points in the gas flow direction.
Location
1. Install the valve in the gas supply line downstream from
the pressure regulator.
2. Mount the valve and actuator in any position that allows
sufficient clearance for installation and for repair and
replacement.
3. Be sure the valve position indicators are easily visible
with the valve and actuator in the final position.
4. Ensure the final position of the valve and actuator allows
for damper linkage, if used.
IMPORTANT
Allow space for turning the valve body and pipe
adapter (actuator not attached) onto the gas piping.
Swing dimensions measured from the center of the
pipe for 3/4 in. through 2 in. (small) valves are 3-1/4
in. (83 mm) and for 2 in. through 3 in. (large) valves
are 5 in. (127 mm).
WARNING
Explosion Hazard.
Can cause serious injury or death.
1. Make sure gas flow is in the direction of the arrow on
the valve body so the valve shuts off.
2. Do not use valve in a corrosive environment or the
valve may not shut completely.
IMPORTANT
Use only the three Grade 5 (minimum) bolts or metric
equivalent with split washers (supplied with valve)
secured and fastened to ensure gas-tight seal. Use all
six bolts.
Installation
Installation instructions are found in form 66-1099, Integrated
Valve Train Assembly Instructions.
OPERATION AND CHECKOUT
Operation
A V5097 Industrial Gas Valve is operated by a V4055, V4062
or V9055 Fluid Power Gas Valve Actuator. The valve opens
when the actuator is energized, and closes when power is
removed. When closed, the valve seals off against the rated
close-off pressure with no power applied. For further
information, refer to the actuator instructions.
Checkout
WARNING
Explosion Hazard And Electrical Shock Hazard.
Can cause explosion, serious injury or death.
Do not allow fuel to accumulate in the combustion
chamber for longer than a few seconds without igniting
to prevent an explosive mixture from accumulating.
WARNING
Explosion Hazard.
Can cause serious injury or death.
1. Do not put the system into service until you have
satisfactorily completed the following Valve Leak
Test, all applicable tests described in the Checkout
section of the instructions for the flame safeguard
control, and any other tests required by the burner
manufacturer.
2. All tests must be performed by a trained,
experienced flame safeguard control technician.
3. Close all manual fuel shutoff valves as soon as
trouble occurs.
After the installation is completed, cycle the valve several times
with the manual fuel shutoff cock closed. Make sure the valve
and actuator function properly. Also perform the Valve Leak
Test before putting the valve into service.
Valve Leak Test (Fig. 5)
This is a test for checking the closure tightness of the gas
safety shutoff valve. It should be performed only by trained
experienced flame safeguard control technicians during the
initial startup of the burner system, or whenever the valve or
valve bonnet is replaced (see Service Information section). It is
recommended that this test also be included in the scheduled
inspection and maintenance procedures. For a periodic
inspection test, follow steps 1, 3, 4, 5, 8, 9, 10, 12, 13, 16, and
17.
1. De-energize the control system to assure no power goes
to the valve actuator (C, Fig. 5).
2. Close the upstream manual gas cock (A).
3. Make sure the manual test petcock (F) is closed in the
leak test tap assembly (D).
4. Remove the leak test tap plug and connect the test
apparatus to the leak tap (D).
5. Close the downstream manual gas cock (E).
6. Open the upstream manual gas cock (A).
7. Run the V5097 Valve to its fully open position (through
the safety system); then immediately de-energize the
system to close the V5097 Valve.
8. Immerse a 1/4 in. (6 mm) tube vertically 1/2 in. (13 mm)
into a jar of water.
9. Slowly open the test petcock (F).
10. When the rate of bubbles coming through the water
stabilizes, count the number of bubbles appearing during
a ten-second period or note the time required for ten
bubbles. Each bubble appearing represents a flow rate
of 0.001 cfh.
To meet US requirements, be sure leakage does not exceed
the rates in Table 6.
9
V5097A-E INDUSTRIAL GAS VALVES
65-0230—07
Advertisement
