Replacing The Spring - Leser 4401 Instrucciones De Servicio

Operating Instructions
Procedure
EN
1. Break the seal.
2. Remove the lever cover.
3. Secure the spindle against twisting.
4. Tighten the spring and adjust the
pressure screw to the desired set
pressure. Observe the permissible
adjustment range of the spring when
doing so.
– The set pressure becomes
higher when the pressure screw is
turned to the right. The spring
is put under more tension.
– The set pressure becomes lower
when the pressure screw is turned to
the left. The tension on the spring is
relieved.
5. Check the set pressure.
6. Install the lever cover.
7. Have the safety valve
resealed by an authorised centre.
» The set pressure has now been set.

9.3 Replacing the Spring

Different steps are required for the disas-
sembly, depending on the system and type
of safety valve. Only the essential steps are
summarised and given in the following han-
dling instructions.
The handling instructions are only intended
to provide a rough orientation and only ap-
ply to spring-loaded safety valves without
options (A). The details must be taken from
the type-specific guides.
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WARNING
Leaking medium
Danger to persons and the environment.
• Take safety measures in accordance
with the medium.
• Capture the medium
from the pipelines.
• Do not allow unauthorised
persons in the danger zone.
• Wear suitable protective equipment.
WARNING
Spring is under tension
Risk of injury from parts flying around.
• Observe the installation instructions
for the safety valve.
• Wear protective equipment.
WARNING
Inverted springs
Blocked springs. Loss of operation.
• Do not invert springs when taking
the safety valve apart.
CAUTION
Spindle is not protected against
twisting
• Damage to the sealing.
• Secure the spindle against twisting.