Emerson FL, Инструкция по эксплуатации

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FL Series
9
If the downstream control line taps into the pipe-
line below the downstream isolating valve, close
hand valve B. Then open vent valve C and vent valve D,
permitting all pressure to bleed out of the regulator.
5. Open vent valve E to release any inlet pressure
that may be trapped in the regulator.
Working Monitor Regulators
1. Close the upstream isolating valve.
2. Close hand valve in pilot supply line.
3. Close the downstream isolating valve.
4. Open a bleed valve between the second-stage
working regulator and the downstream isolating valve.
Permit all pressure to bleed out of the working monitor
regulator and the second-stage working regulator.
5. Open vent valve to vent any intermediate pressure
trapped in the system.
6. Open vent valve to release any inlet pressure
trapped in the regulator.
Maintenance
The regulator parts are subject to normal wear and must
be inspected periodically and replaced as necessary.
The frequency of inspection and replacement depends
on the severity of service conditions and on applicable
federal, state and local codes and regulations.
To avoid personal injury or property
damage from sudden release of pres-
sure, isolate the regulator from the
pressure system, and release all pressure
from the pilot and main valve before
performing maintenance operations.
Main Valve
Main Valve Pad Replacement
1. Remove outlet flange (key 22) by removing socket
head cap screws (key 5).
2. Remove pad holder assembly and O-ring (key 18).
3. Remove pad (key 20) from pad holder (key 19) by
removing cap screw (key 25) and pad retainer (key 21),
replace pad if necessary.
4. Reinstall the pad.
Main Valve Diaphragm Maintenance
1. Place main valve with inlet side up.
2. Remove the travel indicator assembly by removing
the indicator cover (key 40) and indicator bushing
(key 38). Check O-ring (key 37), replace if necessary.
Remove the indicator support (key 36). Check O-ring
(key 35), replace if necessary. Lift out indicator stem
assembly (keys 33 and 34).
3. Remove inlet flange (key 1) by removing socket
head cap screws (key 5). Due to force created by the
spring (key 6), take care when removing inlet flange.
Check O-rings (keys 3 and 4) and anti-friction rings
(key 2), replace if necessary.
4. Lift out spring (key 6). Remove hex head cap
screws, washers, and nuts (keys 9, 14, and 15). Lift
off the inlet cover (key 11). Check O-ring (key 3) and
anti-friction rings (key 2), replace if necessary.
5. Remove diaphargm assembly by removing screws
(key 27) to separate the outlet and the inlet plates
(keys 12 and 8). Check diaphragm (key 10) and O-rings
(keys 26 and 28) for damage and replace if necessary.
Check sleeve (key 16) seating surface for damage.
6. Reassemble in reverse order.
PRX Pilot Maintenance
Always remove spring (key 7) tension
before performing maintenance on this
unit. To remove spring tension, loosen
locknut (key 2) and back out adjusting
screw (key 1) until compression is
removed from the spring.
Lower Case Maintenance
1. Disconnect pilot and remove it from the line.
2. Remove screws (key 10) from lower cover (key 21)
and the separate lower cover from the body (key 16).
3. Use a wrench to hold the stem (key 23) and break
loose the stem nut (key 20). Remove the stem nut and
washer (key 11).
4. Remove the diaphragm plate (key 13), diaphragm
(key 14), pad holder (key 22), and O-ring (key 18).