
DeZURIK
D10322
Page 32
November 2020
Troubleshooting
Condition
Possible Cause
Corrective Action
Packing Leaks
Packing is loose.
Adjust packing.
Packing is worn.
Replace packing.
Valve leaks when closed.
Closed position stop is set
incorrectly.
Adjust closed stop.
Seat is worn or damaged.
Replace seat.
Sealing edge of disc is worn or
damaged.
Replace disc.
Valve body leaks from seat
retainer area.
Pipeline flange bolting is loose.
Tighten pipeline flange bolts.
Pipeline flanges are misaligned.
Align pipeline flanges.
Pipeline flange gasket or seat
retainer gasket is worn.
Replace gasket(s).
Valve does not fully close.
Object is wedged between disc
and seat.
Open valve and allow flushing
action to remove object.
Closed position stop is not
adjusted correctly.
Adjust closed stop.
Disc-to-shaft connection has
failed.
Replace disc pins and/or shaft.
Valve does not fully open.
Open position stop is not
adjusted correctly.
Adjust open stop.
Disc-to-shaft connection has
failed.
Replace disc pins and/or shaft.
Opening or closing torque is
excessive.
Bearings, shaft, disc and/or seat
are dirty or worn.
Clean or replace dirty or worn
components.
Shaft is bent.
Replace shaft.
Seat leakage and/or damage to
seat has occurred.
Media is abrasive.
Replace existing seat with a seat
that is suitable for abrasive
media.
Valve components are eroding.
Replace valve with materials
suitable for abrasive media.
Valve leakage and/or damage
to valve has occurred.
Valve encountered higher than
rated pressure.
Reduce media pressure.
Seat leakage and/or damage to
seat has occurred.
Valve encountered higher than
rated temperature.
Reduce media temperature.
Replace existing seat with a seat
suitable for the required
temperature.
Valve components are
corroding.
Media is corrosive and
incompatible with valve material.
Replace existing valve with a
valve constructed of material
compatible with the media.