Keystone Slurry Control Valves Owner's manual

Brand: Keystone

Model: Slurry Control Valves

Type: Owner's manual

www.valves.emerson.com

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.

VCIOM-02912-EN 15/09

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.

IMPORTANT NOTES FOR VALVE

DISASSEMBLY

a) Use soft dolly’s for removing components.

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.

TYPICAL ASSEMBLY - UPPER O-RING DETAIL

DISC PINNING DETAIL (DN 200)DISC PINNING DETAIL (DN 80 - 150)

(5) Disc pin insert

(4) Disc pin (4) Disc pin

(3) Disc(3) Disc

(6) Shaft

(14) Gland collar

(15) Gland packing

(7,8) Insert

(9) Bearing

(16) O-ring

(22) O-ring

(23) O-ring

(12) Disc springs

(11) DES loader

(10) DES ring

(6) Shaft

KEYSTONE SLURRY CONTROL VALVES

FIGURE 638 SERIES E/SERIES 2

Keystone Slurry Control Valves Owner's manual

Keystone Slurry Control Valves Owner's manual

Keystone Slurry Control Valves Owner's manual

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