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
21
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 wedge
(17) is not damaged.
•
Remove the wedge (17) from the Stem (12). While
holding the stem (12) turn the handwheel (3) in a
clockwise direction to draw out the stem (12).
•
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.
•
Remove the yoke nuts (4) and handwheel (3).
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 wedge (17) onto stem (12).
•
Install bonnet (13) and wedge (17) assembly into the
body.
•
Reinstall and studs (36) stud nuts (37).
•
First take up bolts with hand force, and then use the
recommended torque by OMB to be tightened completely
36
STUDS
37
STUD NUT
17
WEDGE
18
BODY
35
RING JOINT/GASKET
12
STEM
13
BONNET
15
SEAT
7
GLAND STUD
8
GLAND
9
PACKING
4
YOKE NUT
5
GLAND NUT
6
GLAND FLANGE
1
WHEELNUT/LEVERNUT
G002
NAMEPLATE
3
HANDWHEEL
