8trouble shooting guide for tipv valves – Flowserve Serck Audco Twin Isolation Plug Valve User Manual
Page 17
8
TROUBLE SHOOTING GUIDE FOR TIPV VALVES
PROBABLE CAUSES LISTED IN ORDER OF DECSENDING LIKELIHOOD.
NOTE: ‘SAV’ is an abbreviation for Serck Audco Valves
8.9
ACTUATED VALVES
Resolving operation problems on TIPV valves fitted with pneumatic, electric, hydraulic or
gas/hydraulic actuators should be undertaken using the above recommendations in conjunction
with the operator manufacturer instructions.
*NOTE: Injecting sealant into a valve that is leaking through the sealant fitting is normally a
temporary fix, not a cure.
Trouble
Probable Cause
Remedy
8.1
Hard to Operate
A. Lack of sealant
B. Low temperature
C. Dried out sealant
D. Damaged gear operator
E. Plug overloaded into seat
A. Inject sealant
B. Inject low-temperature sealant
and/or insulate the valve
C. Flush the valve with valve flush
Follow manufacturers instructions
Consult SAV for recomended sealant
D. Consult SAV
E. Reset plug (7.3.2.3)
8.2
Will not fully
open or close
A. Improper setting of gear
operator stops
A. Reset stops for proper operation
8.3
Leaks across
seats
A. Lack of sealant
B. Incorrect sealant
C. Plug set incorrectly
D. Damaged seats
A. Inject sealant (7.1)
B. Consult Sav with service details
C. Adjust plug loading screw (7.3.2.2)
D. Rotate plug through 180 degrees (7.4) or
consult SAV
8.4
Leaks at stem
A. Lack of stem packing compound
A. Inject stem packing compound (7.2)
8.5
Leaks at stem
gear unit
A. Lack of stem packing compound
A. Inject stem packing compound (7.2)
8.6
Leaks at cover
A. Cover bolting loose
- if this does not reseal cover then
suspect:
B. Damaged cover seal
A. Tighten cover bolts
B. Remove from service and consult SAV
8.7
Leaks through
sealant fitting*
A. Ball check not sealed
B. Loose sealant check valve
C. Damaged check valve
A. Inject sealant to clean and reseal check
valve
B. Remove pressure and tighten check valve
C. Remove from pressure and replace check
valve
8.8
Leaks through
valve body
A. Casting defect, internal corrosion
or erosion
A. Remove from line and consult SAV
17
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Serck Audco TIPV Twin Isolation Plug Valve FCD - SRENIM0005-04 (A4) – 02/14