Samson EB 20a, Mounting And Operating Instructions

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8-1
EB 20a_EN
May 2022 edition
Subject to technical changes
Malfunction
8 Malfunction
When rectifying the faults, chapter “1 Safety instructions and safety measures” must be observed.
8.1 Detecting and rectifying errors
Type of fault Possible cause Measures
Leaks in the pipe connection The fl ange connection of the
lined ball valve is leaky
Tighten the fl ange screws.
An excessive tightening torque when retightening the fl ange screws
can damage the valve and pipe!
The permissible torque for retightening the pipe fl ange screws is
limited.
Retighten the fl ange connection with the respective tightening torque,
see Table 15-2 or Table 15-3 in Chapter “15.1.1 Tightening torques”.
If necessary, increase the tightening torque to max. 20%.
The fl ange connection is still
leaky after retightening
Loosen the fl ange connection and remove the ball valve, see chapter
“1 Safety instructions and safety measures“.
Check the plane parallelism of the fl ange connection and correct if it is
not suf fi cient.
Check the surfaces on all fl anges. If the plastic lining is damaged,
replace the ball valve together with its fl ange seals, if available.
Check the fl ange seals. If the seals are damaged, replace them.
Leaks in the body parts The body section connection
loosened. Retighten the body halves with the respective tightening torque, see
Table 15-1 in Chapter “15.1.1 Tightening torques”.
Body parts untight after
retightening Replace the body sealing and/or valve, see chapter “1 Safety
instructions and safety measures“.
Increased medium fl ow rate
with the ball valve closed
Leakage in the closed position Remove and inspect the ball valve, see chapter “1 Safety instructions
and safety measures”.
The ball valve is damaged Repairs are necessary.
Remove the ball valve, see chapter “1 Safety instructions and safety
measures”.
Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.
Leaks in the control shaft
sealing Medium escapes
Danger of injury due to escaping medium!
To protect operating personnel from danger, depressurise the line on
both sides of the ball valve, see Chapter
“1 Safety instructions and
safety measures” .
Medium escapes from the
stuf
fi ng box
Remove the ball valve, see chapter “1 Safety instructions and safety
measures”.
Disassemble the ball valve and replace the control shaft sealing.
Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.
NOTE
DANGER