Emerson Tartarini BM6X Series Instruction Manual page 11

b. Through the pressure control connection, use a small
pump or other appropriate means, to raise the pressure
to normal operating level. Reset slam-shut controller after
cut-off in step a.
c. Simulate pressure increase until maximum pressure cutoff
value is reached.
d. Connect the pressure control slam-shut controller (A) and
set the circuit back to operating conditions by following
the instructions described in the Startup section.
Valve-seal Check
a. Slowly close the valve located downstream.
b. Press the "EMERGENCY" button. This will cause the
immediate closing of slam-shut controller.
c. Loosen a connector in the downstream line of the
slam-shut valve or of the regulator. Check the connector
with soap and water, making sure there are no leaks;
make any necessary repairs otherwise.
Maintenance
Routine slam-shut controller maintenance entails simply
periodic checking of the diaphragm on the Type OS/80X-R
(the piston lip seal on the Type OS/84X-R) and the
movement of the levers, i.e. they should move freely with
a minimum of friction. If necessary, lubricate pins with
Molykote 55 M or equivalent.
!
For a successful job it is indispensable to
use qualified personnel, possibly calling on
our Technical Support Representatives.
Before starting maintenance, disconnect
impulse connection (A) to make sure there
is no gas under pressure in the slam-shut
controller. When maintenance operations are
finished check the tightness with suds.
Replacing Diaphragm (Type OS/80X-R only)
a. Remove screws (key 27) and cover (key 61).
b. Replace diaphragm (key 62).
c. To remount diaphragm, coat it with grease, set it in place
around the edge of cover (key 61) and evenly tighten
screws (key 27) to ensure proper sealing.
Replacing O-ring (Types OS/84X-R and OS/88X-R only)
a. Remove plug (key 61) and extract piston (key 68) from
body (key 60).
WARNING
b. Replace O-ring (key 67) and lip seal (key 66).
c. Reassemble by reversing the above procedures.
General Maintenance
a. Remove screws (key 40) and casing (key 47).
b. Remove dowels (key 12) and bushing (key 13).
c. Slide off stem (key 6), lever assembly (keys 17 and 2),
rollers (key 10) and shim ring (key 15). Wash parts,
replace any if worn.
d. Remove nuts (key 18), levers (keys 20 and 36) and
springs (keys 37 and 21).
e. Remove nut (key 30), screw (key 29) and lever (key 33).
f. Remove minimum adjusting screw (key 49), maximum
adjusting nut (key 50) and springs (keys 53 and 54).
g. Remove cover (key 61) on Type OS/80X-R, or plug on
Types OS/84X-R and OS/88X-R, and proceed as directed
in replacing diaphragm/O-ring section.
h. Remove nut (key 70) and locknut (key 69), then slide off
stem unit (key 57).
i. Loosen screw (key 3), unscrew nut (key 9), remove rollers
holder (key 5) and check seals (keys 4 and 8) for wear.
J. Clean all parts with petrol, replace any if worn.
Reassembly
Reassemble all parts by reversing the steps in the general
maintenance section.
As you proceed, make sure all parts move freely without
friction. If necessary, lubricate them with Molykote 55 M
or equivalent.
Make sure to:
a. Narrow the gap between nuts (keys 30 and 18) so that
levers (keys 33, 36, and 20) have minimum play yet move
freely without friction.
b. Before mounting minimum spring (key 54), register
position of lever (key 33) by means of nut (key 70),
locking it into place with locknut (key 69).
The lever (key 33) is in proper position when
it is exactly horizontal and in the center of
the groove of lever (key 36).
BM6X Series
CAUTION
11