Maintenance - Emerson Tartarini FL Series Instruction Manual

FL Series
fully clockwise then 1 turn counterclockwise) and the
damper screw fully counterclockwise.
2. Turn damper screw clockwise until desired
performance is achieved. This reduces the flow path
of the damper. If the damper becomes fully seated
(no longer able to turn clockwise) and the desired
performance has not been achieved, return the
damper screw to the fully counterclockwise position.
3. Turn the restrictor screw an additional turn
counterclockwise from fully seated. This increases
the flow path of the restrictor. If additional tuning is
required, repeat step 2. Follow this method until
desired performance is achieved.
Shutdown
CauTiOn
if the pilot bleed control line pressure is
shut down first, the downstream system
may be subjected to full inlet pressure.
1. If the pilot setting must be disturbed, be sure to keep
some tension on the spring. This will prevent
trapping inlet pressure during blow down.
2. Slowly close the valves in the following order:
a. Inlet block valve
b. Outlet block valve
c. Control line valve(s), if used.
3. Open the vent valves to depressurize the system.

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.
WaRning
!
To avoid personal injury or property
damage from sudden release of pressure,
isolate the regulator from the pressure
system, and release all pressure from the
pilot and main valve before performing
maintenance operations.
8
Main Valve (Refer to Figure 4)
Main Valve Pad/Disk Replacement
1. Remove outlet flange (key 22) by removing socket
head cap screws (key 5).
2. Remove pad/disk holder assembly and O-ring
(key 18).
3. Remove pad/disk (key 20) from pad/disk holder
(key 19) by removing cap screw (key 25) and
pad/disk retainer (key 21), replace pad/disk
if necessary.
4. Reinstall the pad.
5. Reassemble in reverse order. Refer to Table 2
for torque values. Tighten all bolts using a star
pattern and repeat 2 to 3 times to ensure
proper torque.
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.
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).
5. Remove diaphragm 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. Check O-rings (keys 3
and 4) and anti-friction rings (key 2), replace
if necessary.
6. Reassemble in reverse order. Refer to Table 2
for torque values. Tighten all bolts using a star
pattern and repeat 2 to 3 times to ensure
proper torque.