Emerson Keystone Figure 969 Hopper Installation And Operating Manual

KEYSTONE FIGURE 969 HOPPER KNIFE GATE VALVES

InstallatIon and operatIng manual

Gland packing replacement instructions for F969 hopper valves

Gate (2)

Packing (6)

Packing join

PACKING REPLACEMENT

For optimum performance, the packing
material should be replaced whenever the
valve has been disassembled for routine
maintenance. This is a very simple procedure,
which can be done leaving the valve in the
pipeline. Correct packing is essential for
leak-free operation.
Use Emerson’s preformed and pre-cut
Packing Replacement Kits for best results.
Ensurepacking material selected is suitable
forthe service.

Strip-down procedure:

1. Ensure pipeline is not pressurized and
anyhazardous medium is drained away.

2. Close valve, remove clevis pins/bolts.

3. Use actuator or handwheel to raise spindle

clear of gate.

4. Remove all upstand bolts.

5. Remove actuator sub-assembly
(handwheel,upstand, gearbox and spindle
or cylinder actuator).

NOTE

Heavy valves will require a chain block or crane.

REPACKING PROCEDURE

NOTE

Care should be taken to stagger the mitred joints in
each layer of packing to the opposite side of the gland
follower, e.g:

• 1st packing layer joint to the front of the valve.

• 2nd packing layer joint to the rear of the valve.

• 3rd packing layer joint to the front of the valve.

1. Press first layer of gland packing (6) into
gland cavity by hand, then repeat the
process with the gland packing ensuring
the joints of the two layers are on opposing
sides of the cavity.

2. Firmly press the packing (6) around gate
and into gland cavity.

6. Remove gland follower nuts (8) and

washers(7), then remove gland follower (3)

from gate(2).

7. Remove packing (6) from gland cavity.

8. Clean gland cavity.

9. Fit the gland follower over the gate (2).

10. If the gate has excessive irregularities or
abrasion and requires replacement, then
this will necessitate removal of the valve
from the pipeline, to prevent damage to
thevalve seats.

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12, 13

KEYSTONE FIGURE 969 HOPPER KNIFE GATE VALVES

InstallatIon and operatIng manual

REASSEMBLY

1. Replace gland follower (3) onto the gate (2)

and push down until firmly on valve.

2. Coat stud (9) threads with anti-seize
compound. Replace the gland follower
washers (7) and gland follower nuts (8) onto
each stud (9), screw them down equally,
donot over tighten.

3. Refit the upstand (10) and handwheel.

Replace both upstand bolts (12) and upstand
washers.

4. Use actuator (handwheel or pneumatic
actuator) to lower spindle to align clevis
andgate.

5. Fit clevis bolts (14).

6. Assembly is complete, actuate the valve to
check that the gate is seating properly in
theclosed position.

7. When commissioning, gland follower nuts
(8) may require tightening for final gland
packing adjustment.

7, 8

9

6

10

14
2

3

12, 13

NOTE

To minimize risk to personnel, Emerson recommend
the use of purpose built guards and shrouds.
Refer to the Emerson data sheet or consult factory
for details.

CAUTION

Do NOT over tighten gland packing as it will cause
excessive resistance to gate movement.

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Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Keystone is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson
and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication arepresented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available uponrequest. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.

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