4
D. Open and close valve to check for possible obstruction to travel.
E. Check tightness of packing gland on the hinge pin.
7. REPAIRS
The following general instructions are offered to make limited repairs to the valve.
For major repairs, contact an authorized
WILLIAM E. WILLIAMS VALVE
CORPORATION
Distributer
for special instructions. Always give the
information shown on the identification plate affixed to the valve.
A. When holding a valve in a vise to work on it, always put the valve ends against the
vise jaws. Never hold the valve with the vise jaws pressing against the valve body
since this will cause distortion.
B. Replacing Bonnet Gasket –
1. Isolate and de-pressurize valve prior to attempting to disassemble valve.
2. Mark the body and bonnet flanges so they may be mated in the same position
when reassembled.
3. Valves having large or heavy top works will require the use of a hoist or crane
to support and lift the top works away from the valve body.
4. Loosen the bonnet joint and lift the bonnet and top works away from the body
in a direct straight line.
5. Reassemble in reverse order of above instructions.
6. Prior to re-pressurizing the valve, recheck the tightness of the body/bonnet
joint.
C. No periodic maintenance is necessary besides routine inspections. If gasket leaks
are detected, correct using the following procedure:
1. Disassemble all cover bolts and nuts.
2. Check that the hinge, nut, and pin are in good condition and firmly connected.
Replace damaged parts as necessary.
3. Lift and remove the disc-hinge assembly. Movement should be free and not
hindered by any malfunction of the hinge pin. Where disc travel is not
sufficiently smooth, remove plugs or blind flanges and then remove hinge pin.
Check surface for seizure marks. If marks are less than 0.8 mm (1/32”); re-
machine hinge pin and re-assemble, if marks are greater than 0.8 mm (1/32”)
a new hinge pin is necessary. When reassembling hinge pin, it is
recommended that the disc be removed by loosening nut.
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
263 Cox Street
Roselle, New Jersey 07203
ESOV(
EMERGENCY SHUTOFF VALVES
)
1 800
899-0553
sales
@
aa-fs.com
www.
assuredautomation
.com
Doc No.IOM 2010
Rev
01
