BWM TFB
page [14]
state: 05.2018
Failure
Reason
Elimination
Flange connections
are leaky
Inner diameters of
flanges or flares are too
big
•
Switch off system (refer to 6.4.1)
•
Remove Hazardous material valve
•
Check for damage on sealing and
flange faces
•
Check out inner diameters of
flanges or flares
•
If necessary, install flanges or
flares provided of a sufficient
bearing surface
•
Install Hazardous material valve
(according to assembly
instructions)
•
Carry out function test
Hazardous material
valve can’t be closed
Solid object between seal
insert and valve disk
•
Switch off system (refer to 6.4.1)
•
Remove Hazardous material valve
•
Remove solid object
•
Check for damage on sealing and
valve disk and repair them if
necessary
•
Install Hazardous material valve
(according to assembly
instructions)
•
Carry out function test
Hazardous material
valve can’t be closed
Seal insert is porous
•
Check out if operating
temperature is according to
specification
•
Switch off system (refer to 6.4.1)
•
Remove Hazardous material valve
•
Check for damage on sealing
•
Repair with corresponding sealing
•
Install Hazardous material valve
(according to assembly
instructions)
Carry out function test
Hazardous material
valve can’t be closed
Additional pipeline forces
are too big! Hazardous
material valve is distorted
•
Refer to chapter 4.2.
Hazardous material
valve can’t be closed
Pressure of medium in
pipeline is too high
•
Check out if system pressure of
control line is according to
specification
•
Driver power is insufficient
Hazardous material
valve can’t be closed
Cross section of
pneumatic feed lines is
too small
•
Checkout lines and replace them if
necessary
