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Type of fault
Action to be taken
Tighten flange bolts.
Leak at the connection to
If the medium leaks out at the flanges even after tightening the flange bolts:
the pipeline or at the
Unscrew the flange bolts and remove the valve (on doing so, observe the instructions
cover
in section 2.3 <Particular hazards>).
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.
For Butterfly valves with adjustable Stuffing box:
Alternately tighten both bolts at the stuffing box gland by turning them clockwise (in
steps of 1/4 turns) until the leakage stops.
Leak at the shaft packing
If the valve still leaks:
The valve must be repaired. Contact Pfeiffer for spare parts and necessary
instructions.
On loosening or unscrewing the nuts at the stuffing box gland (counterclockwise):
Check whether the valve is 100% closed.
Important note for control valves BR14e:
This valve has a sweeping disc and does not have a tight seal in the closed position.
No tight shut-off when the
If the valve leaks in closed position:
valve is closed
Open/close the valve several times under differential pressure.
If the valve still leaks:
The valve must be repaired: replace the seat ring (observing the instructions in section
2.3 <Particular hazards>). Contact Pfeiffer for spare parts and necessary instructions.
If the valve is damaged:
Malfunction
The valve must be repaired. Contact Pfeiffer for spare parts and necessary
instructions.
8.
Further information
Contact the address below for the listed <Data sheets> and <Repair instructions> as well as further information.
E-mail: vertrieb@pfeiffer-armaturen.com • Internet: www.pfeiffer-armaturen.com
9 of 9
Specifications subject without notice
Edition: August 2017
Danger: To protect the operator, relieve pressure entirely in the pipeline
upstream and downstream of the valve prior to loosening the nuts. Observe
instructions in section 2.3 <Particular hazards>.
Pfeiffer Chemie-Armaturenbau GmbH
Hooghe Weg 41 • 47906 Kempen • Germany
Phone: +49 21 52 20 05 - 0 • Fax: +49 21 52 15 80
Comment
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 internal
parts are not sufficiently
resistant to the process
medium, select parts
made of a suitable
material.
Operating instructions BA 14b-02_EN
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