172-65143M-04 (BB1N·BBF1N) 7 Oct 2021
14
Troubleshooting
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
When the product fails to operate properly, use the following table to locate the cause and
remedy.
Problem
Cause
Remedy
Fluid leaks from the
outlet
The sealing area of the valve has build-
up or is scratched, or if the o-ring is
scratched or damaged
Clean or replace parts
Fluid leaks from the
gland section
There is build-up, scratches or wear on
the seal, stem packing or gasket
Apply additional tightening, clean or
replace parts
The valve does not
move or remains
half-open
The valve seat or ball have build-up, if
the valve seat is deformed, or if the ball
turns smoothly.
Clean or replace parts
The handle is worn or deformed
Replace with new handle
Fluid leaks from
Gasket deterioration or wear
Replace with a new gasket
inlet union or flange
connections
The inlet union or flange bolt is loose
Tighten it to the proper torque
The valve seat
becomes damaged
Check for the occurrence of water
hammer
Examine the piping for problems
that can cause water hammer
The valve is being used in the half-open
position
Use fully open or fully closed
