Pfeiffer Chemie-Armaturenbau GmbH
Hooghe Weg 41 • 47906 Kempen
Phone 02152 2005-0 • Fax 02152 1580
Page 7 of 8
Operating instructions
BA 28y-01_EN
Edition June 2004
7 Troubleshooting
Observe the safety instructions listed in section 2 on troubleshooting.
Warning
To remove a valve from a pipeline containing dangerous media and to take it out of the plant:
Decontaminate the valves properly first.
Type of fault
Action to be taken
Comment
Leak at the
connection to the
pipeline
Tighten flange bolts.
If the medium leaks out at the flanges even after tightening the flange bolts:
Remove the valve (observing the instructions in section 2.3 <Particular hazards>) and
replace the gaskets.
Leak at the
connection
between valve
body parts
Tighten bolts/screws with a torque wrench, see Pfeiffer repair instructions
<EB28a_EN or EB28a/x_EN
If the valve still leaks:
Remove the valve (observing the instructions in section 2.3 <Particular hazards>) and
replace the gaskets. Contact Pfeiffer for spare parts and necessary instructions.
Leak at the shaft
packing
Remove the valve (observing the instructions in section 2.3 <Particular hazards>),
dismantle the valve and replace the shaft packing. Contact Pfeiffer for spare parts
and necessary instructions.
No tight shut-off
when the valve is
closed
Remove the valve (observing the instructions in section 2. 3 <Particular hazards >)
and check it.
If the valve is damaged:
If it must be repaired, remove the valve, observing section 2.3 <Particular hazards>.
Contact Pfeiffer for spare parts and necessary instructions.
Malfunction
Check actuator unit and control signals
If actuator and control equipment are in order:
Remove the valve (observing the instructions in section 2.3 <Particular hazards>) and
check it.
If the valve is damaged:
If it must be repaired, remove the valve, observing section 2.3 <Particular hazards>.
Contact Pfeiffer for spare parts and necessary instructions.
If a pneumatic
actuator with
springs must be
removed from the
valve
Caution: Risk of injury
Before removing the actuator from the valve, disconnect the signal pressure.
Note 1:
When ordering spare
parts, include all the
specifications listed in the
valve designation. Only
use original parts from
Pfeiffer.
Note 2:
If, after removing the
valve from the pipeline, it
is found that the body
and/or internal parts are
not sufficiently resistant to
the process medium,
select parts made of a
suitable material.
For malfunctioning actuator units, refer to the actuator instructions.
8 Further
information
Contact the address below for the listed <Data sheets> and <Repair instructions> as well as further information.
Pfeiffer Chemie-Armaturenbau GmbH
Hooghe Weg 41
•
47906 Kempen
Phone: +49 21 52 20 05 - 0
•
Fax +49 21 52 15 80
E-Mail: [email protected]
•
Internet: www.pfeiffer-armaturen.com
