Causes and Treatment of Valve Body Leakage of Blank Plate Valve
Causes
of valve body leakage of vacuum flapper valve and its treatment
1.
The valve body has sand holes or cracks;
2.
Crack during repair welding of valve body
Handle:
1.
Polish the suspected crack and etch it with 4% nitric acid solution, if there
is crack, it can be shown;
2.
Repair the cracks.
Reasons
for damage of valve rod and its matching screw thread, broken stem head and
bent stem:
1.
Improper operation, excessive switch force, failure of limit device and failure
of over torque protection. ;
2.
The thread fit is too loose or too tight;
3.
Too many operations and too long service life
Handle:
1.
Improve the operation, do not use too much force; check the limit device, check
the over torque protection device;
2.
Select appropriate materials, and the assembly tolerance meets the
requirements;
3.
Replacement of spare parts
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