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
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Improper repairs can cause damage and personal injury or death.
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Disconnect the actuator (if any) from any electrical/pneumatic/hydraulic lines to avoid accidental operation of
the actuator. (For any actuator disassembly, please follow the actuator manufacturer’s instructions and in case
of any doubts ask for technical assistance.)
1. INSPECTION
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Nameplate specifications and all attached documents must be checked to be matched with ordered valve
description in advance of installation. DO NOT install, or attempt to use, any valve that is not properly identified
with material and pressure class.
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Ensure bolts and nuts and hand wheels are not over tightened and are as specified torque value at section E
of this manual, to avoid leakage, damage and personal injury.
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Visual inspection of the valve to ensure it is free from any surface damage or possible damages cause by
transportation.
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Inspect both ports to be completely clean and free from any obstruction, dirt, rust, sandblast or foreign/residual
material, which can cause damage or seat leakage.
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DO NOT change the valve position from
open to close before being sure that it’s bore is completely cleaned,
otherwise, it may damage to the valve seat.
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Remove the end caps only when ready for installation. (Remove caps before placing the valve in line).
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Ensure the valve is installed in accessible location for any further operative action on it.
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For valve with gear, correct gear material must be selected regarding the environmental operation condition.
(offshore/onshore)
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Properly installed valves in constant use for particular service application are expected to have a long service
life if adequate attention given to the specific components and parts in finish surfaces for proper operation and
maintenance of valves throughout their service life. Under normal conditions, maintenance is limited to the
complete replacement of the packing and gasket during the life of the valve whenever the valve has been
disassembled. However sometimes it is necessary to repair or replace valve internals.
2. TOOLS FOR MAINTANANCE
Standard tools and appropriate wrench for removal or replacement of seats are required for valve repair or
maintenance.
