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FULL REPORT

JOB NO : SR14-006
DATE :16 Feb 2014

A Joint-Venture between Deleum Berhad and Dresser Inc
...
serviced and overhauled at Penaga Dresser workshop
1
...
611-PV-315B
3
...
611-PV-316B

INSPECTION METHOD ( visual outer, inner, functional test, leak test and body test)
No

Part

1
...


All of the valves fail seat
leak test
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Service and overhaul actuator

Upon dismantle actuator
casing
...

The spare parts that had
been replaced are:
1
...
Stem wiper
3
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For valve tag no :611PV-316A
1
...
Upon
dismantle, found
diaphragm burst
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Replace with new
diaphragm
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Do valve stroking
test, valve stem able to
move as desired
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Service and overhaul valve Body

Upon dismantle valve
body,

1
...
611-PV-315A

As Found:
1
...

2
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As Left
1
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2
...

3
...


...


2
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611-PV-315B

As Found:
1
...

2
...


As Left
1
...
Only valve
plug replaced with old
plug
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Apply lapping on
valve plug and seat
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Do cleaning with sand
paper on the inner cage
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3
...
611-PV-316A

As Found:
1
...

2
...


As Left
1
...

2
...

3
...
611-PV-316B

4
...
Valve plug and cage
had minor scratch
...
Seat ring had minor
scratch
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Re-used existing
valve trims
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Apply lapping on
valve plug and seat
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Do cleaning with sand
paper on the inner cage

Testing Method
1
...
Install SVI2AP
positioner on the
valves
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Do valve calibration
and take 5 point
check
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Seat Leak Test

Testing procedure
depend on the leakage
class:
For valve class 5,
1
...

2
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Test pressure
for all valves is 300 psi
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Close the valve
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Measure oulet
flowrate
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Outlet flowrate must
be less than allowable
leakage rate
Allowable leakage :
0
...

3
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Body test pressure
depends on max inlet
pressure
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5 x Max
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Holding time : 5 mins
3
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Test pressure is
600 psi
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Valve at 50%
opening, and close valve
outlet
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No leakage or
pressure drop during
testing to pass the test
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Diaphragm
2
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stem wiper
4
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Seat Gasket
6
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The reason was because the valve
trim especially valve plug and cage had badly damage and scratch
...
Hence, all valve trims need to be replaced new
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Besides, do cleaning with sand paper on the
inner cage
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To replace new all body hard parts for all valves
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2
...

3
...

4
...


Reported by:

______________________
Mohd Wafiy
Penaga Dresser

Verify by:

_________________________
PGB Gurun



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