Pfeiffer Chemie-Armaturenbau GmbH
Pfeiffer Chemie-Armaturenbau GmbH • Telefon: 02152 2005-0 • Telefax: 02152 1580 • E-Mail: [email protected] • Internet: www.pfeiffer-armaturen.com
8 of 8
Therefore observe the direction of rotation when installing the actua-
tor!
A label on the butterfl y control valve indicates the direction of rotation.
Fig. 8 – Indicating label stating the direction of rotation
The assembly of the valve is now completed.
5. Malfunctions and their elimination
Assistance in the case of malfunctions is provided in the
operating
instructions
<
BA 14b-01_EN
> for automatic Butterfl y valves, resp.
<
BA 14b-02_EN
> for manually-operated butterfl y valves under
section 7.
6. Repair of the butterfl y valve
6.1 Exchange of the packing
If a leak is detected at the stuffi ng box, the PTFE rings of the packing
( 9 ) may be defect.
It is recommendable to check the condition of the packing.
To remove the packing, the valve is disassembled in the reverse
order to that described in chapter 3.
The PTFE rings of the packing are, together with all plastic parts,
checked for damage and, in case of doubt, exchanged.
Values subject to change
Issue May 2017
Maintenance EB 14b_EN
PDF=143
6.2 Exchange of the sealing ring
If the butterfl y valve is untight in the bore, the sealing ring ( 4 ) may
be defect.
It is recommendable to check the condition of these components.
To remove the sealing ring, the valve is disassembled in the reverse
order to that described in chapter 3.
The sealing ring are, together with all plastic parts, checked for dam-
age and, in case of doubt, exchanged.
6.3 Further repair work
In case of further more serious damage, we recommend the repair
work to be carried out by Pfeiffer.
7. Queries to the manufacturer
(in case of queries please provide following information)
1. Order number (embossed on the type plate)
2. Type, product number, nominal diameter and design of
butterfl y valve
3. Pressure and temperature of the fl ow medium
4. Flow rate in m³/h
5. Drawing of installation, if possible
