Europe,
Middle
East,
and
Africa
Only
Type FL
18
a. Supply fitting A with normal operating pressure.
b. Make sure there is no gas outflow from fitting B.
maintenance
Identical to Type PRX/120, PRX/125 series (see page 16).
Calibration
Identical to Type PRX/120, PRX/125 series (see page 16).
TyPE PS/79, RE/79, PS/80 AND RE/80
(SEE FIGuRE 23)
Installation
a. Make sure that data on the pilot’s plate are compatible
with actual working conditions.
b. Install as directed for regulator.
Startup
Refer to the startup instructions applying to the regulator.
Periodical Checks
Slowly close the outlet slam-shut and check line pressure
between it and regulator.
A slight increase in pressure should be detected: this results
from overload due to closing, and is followed by pressure
stabilization. If, however, outlet pressure continues to rise,
then seal is defective. Check if leak is coming from regulator
or pilot, and service.
maintenance
CauTION
Servicing should be carried out by qualified,
skilled personnel only. For further information,
please contact our Technical Support
Representatives or our authorized dealers.
Let gas under pressure flow out of the
relevant part of the system before servicing.
Replacing Filter
a. Remove the screws (key 41), cover (key 59) and replace
felt (key 61).
Reassemble by reversing the above sequence.
Replacing Stabilizer Diaphragm and Seal Pad
a. Remove screws (key 41), cover (key 64), spring (key 47)
and diaphragm assembly (keys 48, 49, 50, 51, 52, and
53). Replace diaphragm if necessary.
b. Unscrew seat (key 54) and replace pad holder (key 56).
c. Reassemble by reversing the above sequence, make
sure not to “pinch” O-rings (key 55).
Replacing valve Seal Pads
a. Remove plug (key 27) and seat (key 30). Slide out spring
(key 32), pad holder unit (key 34) and forked stem
(key 35).
b. Replace pad holder (key 34) and O-ring (key 37).
Reassemble by reversing above sequence.
General Maintenance
a. Completely release spring (key 5) by turning the adjusting
screw (key 1) counter clockwise.
b. Remove screws (key 7) and cover (key 4).
c. Keep plate (key 9 or 75 for the AP version) blocked with
a box wrench, unscrew nut (key 6). This must be done
exactly as described to prevent damage to or breaking of
safety valve (key 20).
d. Unscrew plate (key 9 or 75 for the AP version) from stem
(key 13) remove parts (keys 10, 11, and 12 or 76, 78, 10,
77 and 12 for the AP version).
For PS/80 and PS/80-AP version:
Unscrew plate (key 9 or 75 for the AP version) from stem
(key 13) remove parts (keys 10, 68, 69, 11, and 12 or 76,
78, 68, 69, 10, 77 and 12 for the AP version).
e. Slide off split pin (key 40). Remove locknut (key 16) with
appropriate wrench and slide out parts (key 17, 18, 19
and 20).
f. Make sure that the surface of seat (key 26) which is
sealed by pad (key 21) is in proper condition.
g. Replace diaphragms (key 10) and all seals.
h. Proceed as directed in the replacement of filter, stabilizer
diaphragm and seal pad, and valve seal pads (see
instructions above).
Reassembly
Lubricate the static O-rings with a thin layer of Molykote
55 M, be very careful not to damage the O-rings when
reassembling. No other pilot parts are to be lubricated.
Reassemble parts by reversing the above steps. As you
proceed, make sure that parts move freely and without friction.
In addition:
a. Once lever (key 39) and stem (key 13) have been mounted
with stem (key 13) against body (key 25), check that a
clearance between forked stem (key 35) and registered (A)
of lever (key 39) is 0.2 to 0.3 mm. If this is not the case,
use register to correct.
