DeZurik APCO CVS-EDV Gebruiksaanwijzing - Pagina 10

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DeZURIK

APCO CVS-EDV Swing Check Valves

Operation

(Continued)

Adjustment (Valves with Air Cushion with Lever & Weight)

Condition

Unlock Flow Control Valve by turning valve lock nut counter-clockwise. Turn

adjustment screw of Flow Control Valve one-half (1/2) turn clockwise. Repeat

Check valve slams

start and stop. If slam persists, continue turning adjustment screw in ½ turn

increments. Be careful not to fully close Flow Control Valve. Lock Flow Control

Valve when finished.

Slam persists

Move weight towards end of lever a couple of inches. Repeat start and stop.

Continue repeating above steps until satisfactory closing is achieved. Then

increase opening discharge isolation valve to ½ open. Repeat start and stop

Slam still persists

pump sequence and above steps until isolation valve is full open. Lock Flow

Control Valve when finished.

Adjustment (Valves with Lever & Weight)

Condition

Check valve slams

Move weight towards end of lever a couple of inches. Repeat start and stop.

Slam persist

Repeat above step.

Notes:

1. Testing must be conducted carefully and adjustments made in small increments to arrive at the

optimum setting where the swing check valve shuts off just prior to or at zero reverse flow.

2. The APCO CVS-EDV Swing Check Valve is not a silent closing check valve.

D12042

Figure 2 – Adjustable Flow Control Valve

Page 10

Adjustment

February 2016