Tilting Disc Type Check Valves
Date:
prepared:
approved:
Page:
22.03.2005
C.Wied
H.Six
7 of 14
Operating instruction No.:
BUW-510/1-E
All check valves:
Danger
to life
Protective grating for lever and weight and if necessary for the oil brake has to
be mounted.
⇒
With operating temperatures above 200°C, the valve casing must be insulated such that the
temperature difference between the housing and the valve disc is not more than 100°C.
⇒
Adjusting of oil brake according to enclosed information sheet.
⇒
The weight(s) is/are to be mounted at the end of the lever.
⇒
If further actuator parts should be ordered: To complete the installation, a functional inspection
must be carried out with the signals of the control system: the armature must close and open
correctly in accordance with the control commands. The signals of the position sensor (when
present) must correctly display the position of the valve.
⇒
It is essential to correct recognisable malfunctions before bringing into service. See also
Section 9 “Troubleshooting guide”.
Danger
Control commands that are incorrectly carried out could
cause danger to the
operations personnel and damage to the pipeline system.
7. Pressure testing and commissioning
The pressure testing of armatures has already been carried out by the manufacturer. For the
pressure testing of a pipeline section with installed armatures, care should be taken:
⇒
if the pipeline has not already been flushed before installation of the butterfly valve, this must be
carefully carried out before bringing into service. the valve disc should be open for this purpose.
⇒
armature open:
the test pressure may not exceed
the value 1.5 x PS
(according to the type
plate).
(PS = maximum permissible design pressure at 20°C)
⇒
armature closed:
the test pressure may not exceed
the value 1.1 x PS
(according to the type
plate).
If an armature leakage occurs, Section 9 "Troubleshooting guide" should be observed.
8. Normal operation and maintenance
Regular maintenance work on armatures is not necessary, but there should be no external leakage
on an armature when the pipeline section is inspected. In such cases, Section 9 “Troubleshooting
guide” should be observed.
For the oil brake: Please refer to the enclosed maintenance instruction.
It is recommended that armatures which remain in a single position for long periods are activated at
least twice a year.