Replacing The Actuator's Operating Diaphragm - Samson 42-36 E Mounting And Operating Instructions

Servicing
9.3.3 Replacing the actuator's
operating diaphragm
NOTICE
!
Do not exchange the operating diaphragm
in an FDA-compliant regulator version.
SAMSON's After-sales Service can support
you to perform such service work.
Tip
The associated order number is written on
the actual operating diaphragm.
Î See Fig. 9-1 and Fig. 9-2
Removing the operating diaphragm
1. Put the regulator out of operation (see
the 'Decommissioning' section).
2. Unscrew the control line (18) at the con-
trol line connection (19).
3. Unscrew the coupling nut (11) of the dia-
phragm actuator from the valve. Remove
the actuator.
4. Clamp the coupling nut (11) into a suit-
able fixture.
5. Unscrew nuts and bolts (15) from the ac-
tuator. Remove the actuator case.
6. Unscrew the diaphragm plate nut (17)
and remove the operating diaphragm
(12) from the diaphragm plate (16).
9-8
Mounting the operating diaphragm
1. Place a new operating diaphragm (12)
onto the diaphragm plate (16) (ensuring
the pressurized side is facing in the cor-
rect direction) and tighten the diaphragm
plate nut (17). Observe the specified
tightening torques (see 'Tightening
torques' in Annex).
2. Place on the actuator case.
3. Insert nuts and bolts (15) and tighten
gradually in a crisscross pattern. Ob-
serve the specified tightening torques
(see 'Tightening torques' in Annex).
4. Place the diaphragm actuator on the
valve and fasten tight the coupling nut
(11). Observe the specified tightening
torques (see 'Tightening torques' in An-
nex).
5. Screw the control line (18) to the control
line connection (19) on the valve and ac-
tuator. Observe the specified tightening
torques (see 'Tightening torques' in An-
nex).
6. Put the regulator back into operation (see
the 'Start-up' section).
EB 3018 EN