OMB Valves S.p.A
. Forged steel GATE, GLOBE & CHECK Valves Installation, Operation and Maintenance Manual Rev.5- 2016
Via Europa,7 Cenate Sotto 24069 (BG) Italy
Tel: +39 035 4256711
Fax: +39 035 942638
www.ombvalves.com
24
DISASSEMBLY
•
Valves must be in half-open position.
•
Loosen and remove gland nuts (5) and stud nuts
(37).
•
Remove bonnet (13) using strap or appropriate
device, lift up and away from Body (18) with care;
ensure disc/piston (19) is not damaged.
•
Remove the wheelnut (1) from Handwheel (3)
•
Remove the stem (12) by turning and extract it from
yoke nut (4).
•
Remove gland (8) and gland flange (6).
•
Remove the old gasket (35) and clean the gasket
contact surface to be free from any residual material
and damaged or scratched.
•
Remove the packing (9) using an appropriate tools
with care to ensure no damage to the stuffing box
surface.
REASSEMBLY
•
Clean all parts thoroughly. Seating surfaces shall be
lubricated (type of lubricant must be advised by
OMB).
•
Correct new gasket (35) must be chosen and Install.
•
Ensure that the body (18) seats correctly on the
gasket (35) all the time.
•
Install new packing (9). (If applicable).
•
Install gland (8) and gland flange (6).
•
Install stem (12) into bonnet (13) assembly.
•
Reinstall gland nuts (5).
•
Replace disc (19) on to stem (12).
•
Install bonnet (13) and disc (19) assembly into the
body.
•
Reinstall studs (36) stud nuts (37).
•
First take up bolts with hand force, and then use the
recommended torque by OMB to be tightened
completely.
3
HANDWHEEL
35
RING JOINT/GASKET
36
STUDS
37
STUD NUT
15
SEAT
18
BODY
19
DISC \ PISTON
9
PACKING
12
STEM
13
BONNET
6
GLAND FLANGE
7
GLAND STUD
8
GLAND
G002 NAMEPLATE
4
YOKE NUT
5
GLAND NUT
1
WHEELNUT/LEVERNUT
