Replacing The Set Point Springs - Samson 44-7 Mounting And Operating Instructions

Servicing
7.3 Replacing the set point
springs
DANGER
!
Risk of personal injury due to preloaded
springs.
Regulators in combination with preloaded
set point springs are under tension. These
regulators can be identified by the red warn-
ing label on the actuator's set point springs.
− Before starting any work on the springs,
relieve the compression from the preloaded
springs.
− Only use the SAMSON disassembly tool
(1280-4052).
NOTICE
!
Risk of regulator damage due to excessively
high or low tightening torques.
Observe the specified torques on tightening
regulator components. Excessively tightened
torques lead to parts wearing out quicker.
Parts that are too loose may cause leakage.
Observe the specified tightening torques.
NOTICE
!
Risk of TÜV approval (based on AGFW
worksheet FW 506) for Types 44-4 and
44-8 becoming void.
Consult SAMSON's After-sales Service de-
partment before you change parts or per-
form service or repair work on TÜV-tested
Type 44-4 and Type 44-8 Regulators.
28
Note
SAMSON's After-sales Service department
can support you concerning lubricant, tight-
ening torques and tools approved by SAM-
SON.
Refer to Fig. 3
Disassembly of Type 44-7
1. Put the regulator out of operation (see
section 9.1).
2. Completely relieve the tension from the
set point spring (8) by turning the set
point adjuster (10) counterclockwise ().
3. Remove the device from the pipeline
4. Unscrew the control line (11).
5. Use the SAMSON disassembly tool to
unscrew the set point adjuster (10) from
the diaphragm stem (7).
6. Lift off the spring plate (9) and the set
point spring (8).
7. Examine the diaphragm stem (7) for
score marks. Replace, if necessary. Pro-
ceed as described in section 7.2.
Assembly of Type 44-7
1. Use the SAMSON disassembly tool to
screw the valve body (1) together with
spring plate (9) and the set point springs
(8).
2. Screw the set point adjuster (10) onto the
diaphragm stem (7).
3. Screw on the control line (11). Observe
tightening torque specified in section 7.4.
4. Put the regulator into operation (see sec-
tion 5.3).
EB 2723 EN