DeZurik KGC-BD Instructions Manual - Page 12

Browse online or download pdf Instructions Manual for Plumbing Product DeZurik KGC-BD. DeZurik KGC-BD 13 pages. Bi-directional knife gate valves with guides

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2-36" KGC-BD BI-DIRECTIONAL KNIFE GATE VALVES WITH GUIDES

Replacing the Gate

11. On KGC-BD valves, powered actuators should be set-up to avoid excessive compression of the

perimeter seat when closing the valve. To accomplish this, have the cylinder actuator fully ex-

tended and the clip holes aligning with the gate when it is fully down into the valve. Then, retract

the actuator and thread the clip outward two revolutions. After this, the clip can be attached to the

gate.

12. Adjust the actuator, yoke, and packing gland so that the valve actuates smoothly full stroke in both

directions, and so that there is no evidence of binding or scratching on the gate when the gate is

visible in the fully open position.

13. Reinstall the valve in the pipe line —see "Installation" section.

14. If the actuator is a powered actuator, reconnect power to the actuator.

15. Pressurize the pipeline and inspect the valve for leaks.

16. If the packing leaks, tighten the adjustment nuts (A7) on top of the packing gland.

Note: Tighten the nuts evenly and slowly, just enough to stop the leakage. Over tightening will cause

excessive operating forces, and will decrease the life of the packing.

Troubleshooting

Packing leaks, with no evidence

of galling on gate

Packing leaks and gate is galled

Valve leaks when fully closed,

with no evidence of galling on

Valve leaks when fully closed

D11050

continued

Condition

gate

Possible Causes

Packing is loose

Packing is worn or torn

Seat is worn or torn

Page 12

DeZURIK

Corrective

Action

Adjust packing gland

Replace packing

Replace packing and

gate, check seat for

damage or wear

Contact DeZURIK if

seat replacement is

required

Contact DeZURIK if

seat replacement is

required, check gate

condition

July 2018