Neles Easyflow J7 DN15, Инструкция по установке, обслуживанию и эксплуатации

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5 IMO-240 EN - Issue 7/2020
WARNING:
ALWAYS DISCONNECT THE ACTUATOR FROM ITS POWER
SOURCE, PNEUMATIC, HYDRAULIC OR ELECTRICAL,
BEFORE ATTEMPTING TO REMOVE IT FROM THE VALVE!
WARNING:
DO NOT REMOVE A SPRING-RETURN ACTUATOR UNLESS
A STOP-SCREW IS CARRYING THE SPRING FORCE!
1. Detach the air supply, electrical supply, hydraulic supply and
control signal cables or pipes from their connectors.
2. Remove the actuator mounting bracket screws.
3. Lift the actuator straight up in line with the valve stem until
the connection between actuator drive and valve stem is
completely disengaged.
4. Place actuator in a safe location to avoid damage or
personal injury.
4.3 VALVE DISASSEMBLY
NOTE:
It is good practice to replace all seats and seals any time a
valve is disassembled.
NOTE: Always use original OEM parts to make sure that the valve
functions properly.
Numbers in ( ) refer to items shown in the exploded view
1. Follow the steps in all the
WARNING sections above before
performing any work on the valve.
2. Open the valve.
3. Place the valve on a bench or other suitable working space.
4. Secure tank side flange to working surface to prevent
movement during disassembly.
5. Remove body nuts (20).
6.
Lift end piece (2), body seal (17), body gasket (18), and seat
(4) from valve.
7. Close ball (3) by rotating stem (5) and lift ball (3) from body.
8. Remove lower seat (4) from valve body, being careful not to
scratch the body sealing surface behind the seat.
9. Remove gland nuts (16), gland flange (14), disc spring (13),
stem retainer 2 (10), v-ring stem seal (9), stem retainer 1
(8), and stem seal (6). Use caution to prevent denting or
scratching the sealing surface inside the packing bore.
10. Push stem (5) into valve body and carefully remove. Avoid
denting or scratching the sealing surface on the stem.
11. Remove bottom stem washer (7) from the body.
4.4 CHECKING PARTS
1. Clean all disassembled parts.
2. Check the stem (5) and ball (3) for damage. Pay particular
attention to the sealing areas.
3. Check all sealing and gasket surfaces on the body (1) and
end piece (2).
4. Replace any damaged parts.
5. Replace any fastener where the threads are damaged or have
been heated, stretched or corroded.
6. Replace any parts that have cracks, gouges or pits that will
affect sealing.
NOTE: When ordering spare parts, always include the following
information:
a. Valve type code as per technical bulletin and model
number from name plate,
b. If the valve is serialized - the serial number (stamped
on the valve body or name plate) or applicable
manufacturing order number,
c. Spare part set number as per Table 3 .
4.5 VALVE ASSEMBLY
Numbers in ( ) refer to items shown in the exploded view.
It is advisable to replace seats and seals if complete disassembly
and reassembly become necessary.
1. Clean all valve components, if not previously done.
2.
Inspect all components for damage before assembling the
valve. Look for damage to the sealing areas on the ball, stem,
and body.
3. With a brush, clean body studs (19) and gland stud (15)
of foreign material such as paint, thread locker, grime and
commodity. Inspect the threads for damage or defect with
appropriate ring or plug gage. Repair any out-of-tolerance
threads or replace in-kind.
4. Re-inspect all components for damage to the sealing areas, stem
(5), body (1), and end piece (2). Replace any damaged parts.
5. Carefully clean and polish the ball (3) sealing surface: It should
be free of all scratches and grooves.
6. If the ball is slightly damaged, it may be possible to smooth the
sealing surface with crocus cloth or equivalent. If deep scratches
are present, replace the ball.
7. With the body cavity facing up, insert one valve seat (4) into
the body (1) to below the stem bore. Tilt the seat into place and
position so the proper surface will be in contact with the ball.
8. Place stem washer (7) over stem (5) and gently press into
place against shoulder on stem (5).
9. Insert the stem (5) into the body (1), being careful not to
scratch the stem sealing surface; and press it gently up into
the stem bore until resistance is felt from the stem washer (7).
10. Holding stem (5) in place from the bottom, insert stem seal (6),
stem retainer 1 (8), v-ring stem seal (9), and stem retainer 2
(12) with both inner and outer o-rings (11) and (12).
11. Install disc springs (13) (see figure for proper orientation), gland
flange (14), and gland flange nuts (16).
Figure 3. Proper Disc Spring Arrangement (uncompressed)
12. Tighten gland nuts (16) evenly until stem seal (9) is
compressed and then tighten an additional ¼ turn. Visually
inspect to ensure gland flange (14) is parallel with top of
actuator mounting flange.
13. Rotate the stem (5) so the ball drive is in the closed position.
Place the ball (3) into the body cavity by partially rotating and
sliding the ball onto the stem (5) and against the seat (4).
Make certain the stem is roughly in the middle of the ball slot.
14. Place the second seat (4) into the end piece (2) in the correct
orientation so the proper surface contacts the ball.