DeZurik KGC-MC 사용 설명서 - 페이지 12

{카테고리_이름} DeZurik KGC-MC에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DeZurik KGC-MC 17 페이지. Metal cutting knife gate valves

DeZURIK

KGC-MC METAL CUTTING KNIFE GATE VALVES

Seat Replacement

Reassembling the Valve

1. 1.Reassemble the pipeline flange and

flange bolts, or reassemble the valve in the

pipeline if the valve was removed. Refer to

the requirements in the "Installation"

section.

2. If the actuator is a powered actuator,

reconnect power to the actuator.

3. Pressurize the pipeline and inspect the

valve for leaks.

Note: If the gate is for a KGC-MC metal cutting

valve with a pneumatic cylinder actuator, the

clip and gate are match drilled to handle high

frequency cycling. In this case, refer to the

Replacing the Clip section and drill out the

gate holes that align with the clip.

See Figure 6 for component identification.

WARNING!

Pipeline pressure can cause personal injury or equipment damage. Relieve

pipeline pressure before removing gate stem and packing gland nuts.

1. Relieve the pressure in the pipeline and close the valve.

WARNING!

Accidental operation of power actuator can cause personal injury or equipment

damage. Disconnect and lock out power to actuator before servicing.

2. Disconnect and lock out power to prevent accidental operation of the actuator.

3. Remove the pipeline flange bolts, and remove the valve from the pipeline.

4. Remove the actuator, actuator yoke, packing gland (A4), scraper rings (A2) and packing (A8) from

the valve.

5. Remove and inspect the gate (A3). If the gate appears to be scratched or galled due to too-long

flange bolts in the chest area of the body, check for body damage in the tapped flange holes within

the chest cavity. Carefully check the seat and guides for damage. Repair or replace the body, as

appropriate.

D11060

continued

Page 12

Figure 6

November 2020