AirSep AS-Q, Инструкция по эксплуатации

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136 AS-Q—AS-Z Series Instruction Manual
AirSep Corporation
3. Remove C-shaped retainer ring (47) from the shaft.
4. Remove the compression ring (9).
5. Remove the old shaft seal (8) segments. Do not score
the shaft or body bore!
6. The spacer (7) need not be removed for shaft seal
replacement.
7. Replace the old shaft seal with a new shaft seal. NOTE:
If the seal is of the PTFE V-ring type, keep the seal
rings stacked in the same order as removed from kit.
Note the orientation in (Figure 15).This orientation is
preferred for all applications, including vacuum.
8. Reinstall the compression ring (9), the retainer ring
(47), the compression plate (10), the nuts (15). NOTE:
If the compression ring initially sits too high to install
the retainer ring it may be necessary to precompress
the shaft seals somewhat. In that case, install the
compression plate and tighten the nuts enough
to accomplish the precompression. Remove the
compression plate to install the retainer ring and then
complete the reassembly.
9. Close the valve.
10. With the valve closed, tighten the nuts (15) on
the compression plate evenly until the packing is
adequately compressed to prevent leakage. This
should require tightening the nuts approximately 1-1/2
to 2 full turns after they have both come into contact
with the compression plate.
4.7 Valve Disassembly
Numbers in ( ) refer to items shown in (Figures 15 & 15A).
NOTE: If complete disassembly becomes necessary,
replacement of seats and all seals is recommended.
1. Place the valve on a bench or other suitable working
space.
2. If the seat is to be replaced or removed, follow Steps 2,
3, 4 and 5 in the SEAT REPLACEMENT Section. NOTE:
It is good practice to replace the seat, shaft and body
seals and bearings any time a valve is disassembled.
3. Remove the shaft seal compression hardware
as detailed in Steps 1-4 in the SHAFT SEAL
REPLACEMENT Section. The seal material itself can be
more easily removed after the shaft has been removed
from the valve.
4. Remove the disc pin welds by grinding or machining off
the welds. Drive out the pins opposite the installation
direction shown in (Figure 15).
5. Remove screws (55) and cover plate (53), and remove
gasket (54).
6. Remove the shaft (4). NOTE: When removing the shaft
and freeing the disc, be careful not to scratch the
sealing surface of the disc.
7. Remove the disc (3) and upper and lower thrust
bearings (64).
8. Remove the top bearing (6) either through the top of
the valve or the waterway.
9. Remove the bottom bearing (6).
4.8 Checking Parts
1. Clean all disassembled parts.
2. Check the shaft (4) and disc (3) for damage. Pay
particular attention to the sealing areas.
3. Check all sealing and gasket surfaces of the body (1)
and insert (2).
4. Replace any damaged parts.
NOTE: When ordering spare parts, always include the
following information:
a. Valve catalog code from Identification plate,
b. If the valve is serialized – the serial number
(stamped on the valve body),
c. From Figure 15, the ballooned part number, part
name and quantity required.
4.9 Valve Assembly
Numbers in ( ) refer to items shown in (Figure 15).
1. Clean all valve components.
2. Inspect all components for damage before assembling
the valve. Look for damage to the sealing areas on the
disc, shaft, and body, and for wear in the bearing areas.
3. Carefully clean and polish the disc sealing surface. It
should be free from all grooves and scratches.
4. If the disc is slightly damaged, it may be possible to
smooth the sealing surface with crocus cloth, a fine stone,
or the equivalent. If deep scratches are present, replace
the disc or return the valve to the factory for service.
5. Install the bearings (6) into the body bores.
6. To ease assembly of the shaft into the disc, it may be
necessary to coat the shaft and the disc bore lightly
with a lubricant compatible with the media to be
handled by the valve.
7. Slide the shaft through the top bearing and engage
the top thrust bearing (64). With the two pin holes
IMO 1/18
10 IMO-308 EN