Instruction and Operation Manual
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case of such situation, valve shall be repaired or replaced. It is suggested that inspection and
maintenance of valve shall be perform every three months provided the fluid is water or oil
,every
month or to local law provided the fluid is strong corrosive
.
10.5
When performing Repair/maintenance operations, user shall use valve packing, gasket, bolt
and nut of the same size and material as the original one. Valve packing and gasket may be
ordered as spare parts for maintenance and replacement
. It is forbidden to open the bonnet or
replace the bolt
, nut or packing when the valve contains pressure. After
replacement of packing
, gasket, bolt and nut, valve shall be closure test prior to reuse.
10.7
User may repair the valve-sealing surface providing a successful closure test is performed
and the sealing is ok
.
10.8
Generally valve trim prefers replacement to reparation. It is better to use provided part as
replacement. If part produced by valve manufacturer is not available due to emergency,user
shall produce the part to SPECS's technical documentation
. SPECS takes no responsibility
for loss caused out of part produced other than SPECS
.
10.9
It is not recommended for reparation of valve pressure-containing part by user. If the
pressure-containing part is used for a long time and consequently defection occurs and affect
safety use
, user shall replace the valve with a new one.
10.10
Welding repair on valve online is forbidden.
10.11
The online valve shall not be knocked, walked on or used as weight support.
11.
Potential Failure and Troubleshooting
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