DeZurik APCO 100SR Handbuch für Installation, Betrieb und Wartung - Seite 11
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Maintenance-Spring Return
Disassembly Procedure:
1. Isolate the Rubber Flapper Valve from the system, and then relieve pressure on the discharge
side of the valve by loosening the cover bolts (4) and (5) approximately three full turns.
2. Completely unscrew all cover bolts and lift off Cover (2) including the spring mechanism
assembly. This will disconnect the Spring (63) from the Lower Spring Guide (51).
3. Remove Rubber Flapper (10) and check for cracks and tears and inspect body seat surface for
wear.
Assembly Procedure:
1.
Replace Cover Gasket (3) if necessary.
2.
Replace Rubber Flapper (10) and make certain it rests flat and centered against the body seat
surfaces.
3. Install Spring (63) over Lower Spring Guide (51).
4. Carefully replace Cover (2) over Flapper (10) making sure not to move Flapper from its seating
position.
5. Replace cover bolts (4) and (5) and tighten alternately opposite each other in rotation.
December 2012
APCO CRF Rubber Flapper Swing Check Valves
(Continued)
Page 11
DeZURIK
D12007