DeZurik APCO CDD-9000T Podręcznik użytkownika - Strona 5
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Maintenance
It is suggested that these valves, which do not require routine scheduled maintenance, be included as
part of the normal facility equipment inspections for any malfunction while under normal usage
conditions. A malfunction of the valve will be apparent by the leakage of the media. In some
installations where there is a high head, a moderate "slam" of the Double Doors will be normal.
.
These valves may open or close without warning due to flow changes from pumps starting
and stopping. Servicing these valves while the pipeline is under pressure can cause
personal injury or equipment damage.
Relieve pipeline pressure and lockout the pumps before servicing the valve.
Disassembly Procedure
See Figure 1 for part identification.
Instructions for valves using pin retainers
1. Relieve the pressure in the pipeline.
2. Remove valve from line.
3. Remove pin retainers (7).
4. Remove stop pin (6) from body (1).
5. Depress spring or springs (4) to free hinge pin (5) and push hinge pin out of the body (1) while
holding the spring firmly, since it is preloaded and may snap out.
6. Remove spring or springs (4), doors (2).
Instructions for valves using caps
1. Relieve the pressure in the pipeline.
2. Remove valve from line.
3. Loosen cap (9) set screws.
4. Pinch caps (9) inward and withdraw caps, hinge pin (5) and stop pin (6), spring (4), and doors
(2).
September 2015
APCO CDD-9000T Double Door Check Valves
Page 5
DeZURIK
D12041