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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3. ROUTINE MAINTENANCE
Inspection of the functionality of installed valves in one position by controlling lubrication, stem packing and stem
threads, bonnet joint, seat and the end connections, surface corrosion of moving parts, leakage (especially on check
valves), stem seals for high pressure and temperature operated valves. To avoid any possible malfunctioning of
the installed valves, it is highly recommended to do the inspection every 2 days, or maximum every 2 months.
4. LUBRICATION
The valves are supplied with the stem threads engaging the yoke nut greased with BLASOLUBE 301 (see the SMDS
on OMB web site (www.ombvalves.com) or equivalent grade. These components should be kept constantly
lubricated, maximum every 2 months by applying the grease directly on the stem when the valve is in the open
position or through the grease injector in the yoke nut when provided.
5. DIRECTION
Check and Globe valves are supplied with an arrow stamped on the body, which indicates flow direction. While
ensured the inlet end is fitted against line pressure; the direction arrow may be embossed or stamped on the valve
body. Cryogenic Gate Valves are unidirectional due to the hole drilled on upstream side of gate. These valves are
supplied with HP marking on SS tag plate attached to the body, which indicates flow direction. When fitting ensure
inlet end is fitted against line pressure.
6. ACTUATOR SETTING INSTRUCTIONS
The torque and end- run micro switches and the various cabling setting must be in accordance with actuator
manufacturer instructions.
Horizontal Flow Direction
Vertical Flow Direction
