Date of Issue: 19 August 2021
Page 22 of 24
QF 80: Issue 2
Parker Hannifin
– Instrumentation Products Division Europe
President Park, President Way, Sheffield,
South Yorkshire, S4 7UR, United Kingdom
Tel: +44 (0) 114 224 0000 Web: www.parker.com/ipd
Globe / Needle Valve (DN10 (⅜”) – DN50 (2”)
Reference Number:
IOM 002
Date:
20 May 2014
Issue:
B
Troubleshooting
SYMPTOM:
FAULT:
SOLUTION:
LEAKING BONNET
MISSING GASKET
FIT NEW GASKET
DAMAGED GASKET
FIT NEW GASKET
INCORRECT TORQUE SETTINGS TO HEADWORK
FASTENERS OR UNION NUT
RESET TORQUE VALUES
DIRT ON SEAL FACE
CLEAN SEAL FACES AND
REPLACE GASKET
LEAKING THREADED END
CONNECTION
LOOSE END CONNECTION
TIGHTEN CONNECTION
PTFE TAPE NOT USED
APPLY PTFE TAPE
DIRT ON THREADS
CLEAN THREADS AND
USE NEW PTFE TAPE
CROSSED THREADS
CHECK THREADS FOR
DAMAGE, RENEW ANY
DAMAGED THREADED
PARTS
LEAKING FLANGED END
CONNECTION
LOOSE END FLANGE FASTENERS
TIGHTEN TO CORRECT
TORQUE
MISALIGNED FLANGES
ALIGN FLANGES (DO NOT
STRESS
MISALIGNED PIPE WORK
WITH VALVE)
MISSING OR DAMAGED FLANGE GASKET
RENEW FLANGE GASKET
DIRT ON SEAL FACES
CLEAN FACE AND
REPLACE GASKET
EXCESSIVELY TIGHT VALVE
OPERATION
HEADWORK STEM AND/OR STEM TUBE BENT OR
DAMAGED
REPLACE COMPLETE
HEADWORK ASSEMBLY
LEAKING GLAND
WORN GLAND PACKING
TIGHTEN GLAND NUT TO
SPECIFIED TORQUE
GLAND CONTINUES TO
LEAK AFTER TIGHTENING
GLAND PACKING EXCESSIVELY WORN
RENEW GLAND PACKING
AND RE-TIGHTEN GLAND
NUT TO SPECIFIED
TORQUE
TIGHT OPERATION
GLAND PACKING NUT TOO TIGHT
CHECK TORQUE
