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Note
SAMSON's After-sales Service can support
you concerning lubricant, tightening torques
and tools approved by SAMSON.
Note
The stem surface is roller-burnished. Do not
reface the stem.
After replacing the diaphragm stem, the
nipple (guide bushing) in the actuator case
must be replaced as well.
Tip
The associated order number is written on
the actual rolling diaphragm.
Î Refer to Fig. 3
Disassembly of Type 44-2
1. Put the regulator out of operation (see
section 9.1).
2. Completely relieve the tension from the
set point springs (70...78) by turning the
set point adjuster (56) counterclockwise
().
3. Remove the device from the pipeline
4. Unscrew the control line (116).
5. Use the SAMSON disassembly tool to
unscrew the set point adjuster (56) from
the diaphragm stem (83).
6. Lift off the spring plate (95) and the set
point springs (70...78).
7. Unscrew the body screws (130) and take
off the actuator housing (112).
EB 2623-1 EN
8. Unscrew the diaphragm plate nut (57)
from the diaphragm stem (83).
9. Take off the diaphragm plate (90) and
operating diaphragm (125).
10. Examine the diaphragm stem (83) for
score marks. Replace, if necessary.
Assembly of Type 44-2
1. Place the operating diaphragm (125) to-
gether with the diaphragm plate (90) on-
to the diaphragm stem (83) and tighten
the nut (57). Observe the tightening
torques specified in section 7.4.
2. Apply lubricant to the diaphragm stem
(83). See section 7.4.
3. Insert the diaphragm stem (83) together
with the operating diaphragm (125) into
the actuator housing (112).
4. Check the facings of the actuator hous-
ing (112) for dirt and clean them, if nec-
essary.
5. Place the actuator housing (112) on the
valve body (30) and tighten the screws
(130) evenly. Observe tightening torque
specified in section 7.4.
6. Use the SAMSON disassembly tool to
screw the valve body (30) together with
spring plate (95) and the set point
springs (70...78).
7. Screw the set point adjuster (56) onto the
diaphragm stem (83).
8. Screw on the control line (116). Observe
tightening torque specified in section 7.4.
9. Put the regulator into operation (see sec-
tion 5.3).
Servicing
27
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