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valve - what causes a leak

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godel123

Petroleum
Joined
Jun 10, 2011
Messages
51
Location
DZ
hi
1-corrosion.
2-errosion.
3?
 
1- corrosion
2- erosion
3- worn seats
4- seal or packing failure
5- poor casting of body or bonnet (Cast valves)
6- stress crack in body or bonnet (Forged valves)
7- loose packing gland nut

prognosis: Lead or Lag
 
is greasing affects the leaking?
 
ALL THIS PLUS HIGH SPEED FLOW MAY ALSO AFFECTED
 
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