21
KEYSTONE SLURRY CONTROL VALVES
FIGURE 638 SERIES E/SERIES 2
Complete disassembly instructions for DN 40-200 Class 150, 300 and 600 slurry control valves.
IMPORTANT NOTES FOR VALVE
DISASSEMBLY
a) Use soft dolly’s for removing components.
DISASSEMBLY PROCEDURE
1. Remove the valve from the pipeline. The
disc should be in the closed position.
2. Disconnect any electric or pneumatic lines
and remove the actuator.
3. Clean off all external deposits of slurry by
steam cleaning or grit blasting.
4. Remove gland nuts (18) from gland follower
studs (17).
5. Remove insert retaining screws (19, 20) at
both the top and bottom of the valve.
6. For valve sizes DN 80 - 150, using a chisel
remove the disc pin insert heads (5)
from the disc pins (4) (see pinning detail
overleaf).
For valve size DN 200, with the disc in the
closed position drill out (from one side
only), both disc pin inserts (see pinning
detail overleaf).
7. Using a suitable sized pin punch drive out
the disc pins (4).
8. Using a brass or aluminium dolly, drive the
shaft (6) from the top end down until the
shaft collar rests against the gland follower
plate (13). This pushes the lower insert (8)
out of the valve body (1).
9. Remove lower insert (8).
10. The shaft (6) can now be driven out,
together with the gland assembly (13, 14)
using a soft dolly, from the bottom end of
the valve.
11. Remove the disc (3) from its position
between the disc end spacers (10, 11).
12. Drive the upper insert (7) out from the
inside.
NOTE: Care should be taken as this component
may be reusable.
13. Remove disc end spacers (10, 11) and disc
springs (12). If disc end spacers are tight,
light tapping from outside the body should
enable them to be removed.
NOTE: Care should be taken as this component
may be reusable.
14. Withdraw the liner (2), which can be taken
out from either side. If tight, push the liner
out with a hydraulic press.
15. Remove bearings (9), packing (15) and
O-rings and discard.
16. Thoroughly clean all components and
examine them for excessive wear or
damage, replacing/repairing where
necessary.
17. The valve is now ready for reassembly.
2
3
4
5
6
18
17
13
14
19
20
15
7
9
16
12
22
23
11
10
1
10
11
23
22
12
16
9
8
20
19
www.valves.emerson.com
© 2012 Pentair plc. All Rights Reserved.
VCIOM-02912-EN 15/09
KEYSTONE SLURRY CONTROL VALVES
FIGURE 638 SERIES E/SERIES 2
(22) O-ring
(23) O-ring
(10) DES ring
(14) Gland collar
(15) Gland packing
(7,8) Insert
(9) Bearing
(16) O-ring
(12) Disc springs
(11) DES loader
TYPICAL ASSEMBLY - UPPER O-RING DETAIL
(6) Shaft
(4) Disc pin (4) Disc pin
(5) Disc pin insert
(3) Disc(3) Disc
(6) Shaft
(5) Disc pin insert
DISC PINNING DETAIL (DN 200)DISC PINNING DETAIL (DN 80 - 150)
© 2017 Emerson. All rights reserved.
2
Loading...