Pfeiffer Chemie-Armaturenbau GmbH • Phone: +49 2152 2005-0 • Fax: +49 2152 1580 • E-Mail: [email protected] • Internet: www.pfeiffer-armaturen.com
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EB 26a_EN
Specifi cations subject to change without notice
Issue August 2014
PDF=106
5.1.5 Pressure
specifi cations to press the graphite rings
into the seat rings
Nominal size
Pressure
DN 15 to DN 50
=> 40 bar on both sides/water
DN 65 to DN 80
=> 25 bar on both sides/water
DN 100
=> 16 bar on both sides/water
Table 6 - Pressure specifi cations
Assembly of the ball valve is now completed.
6 Troubleshooting
Refer to section 7 of Operating Instructions
<
BA 26a-01
> for automated ball valves or
<
BA 26a-02
> for manually operated ball valves.
7 Repair of the ball valve
7.1 Replacing the packing
If a leak is detected at the packing, the PTFE rings of the V-
ring packing ( 12 ) may be defective. We recommend check-
ing the condition of the packing.
To remove the packing, disassemble the valve in reverse or-
der to that described in the corresponding section. Check the
rings of the packing and all sealing parts for damage. In case
of doubt, replace the parts with new ones.
7.2 Replacing the seat rings and ball
If the ball valve does not shut off tightly, the set of seat rings
and the ball ( 4 ) may be defective. We recommend checking
the condition of these components.
To remove the seat rings and the ball, disassemble the valve
in reverse order to that described in corresponding section.
Check the seat rings and the ball as well as all sealing parts
for damage. In case of doubt, replace the parts with new
ones.
7.3 Further repair work
In case of severe damage, we recommend the repair work to
be carried out by Pfeiffer.
0 Customer
inquiries
Should you have any inquiries, please submit the following
details:
1. Order number (embossed on the ball valve body)
2. Type, product number, nominal size and version of
the
valve
3. Pressure and temperature of the process medium
4. Flow rate in m³/h
5. Installation sketch, if possible
