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DeZURIK

APCO CRF Rubber Flapper Swing Check Valves

Oil Filling Procedure

Recommended Oils: Motor oil SAE 20, Mobil DTE 24, Castrol Hyspin AW 32.

Step 1: Hydro-pneumatic accumulator tank

1. Shut down pump.

2. Release pressure of hydro-pneumatic tank and remove pipe plug located on the side of the

tank and also either the Pressure Gauge (32B) or Air Valve (32A).

3. Fully open Flow Control Valve (41B) and slowly fill cylinder with oil until it spills out of the

side port. This is the oil fill level.

4. Replace both fittings and pressurize tank according to the formula;

5. Set flow control valve three turns counterclockwise from fully closed position.

6. Start pump and observe if buffer rod extends. If not, while valve is still open add more

pressure in increments of 5 psi until rod fully extends.

Step 2: Oil Reservoir

1. Start pump.

2. Remove side plug and Breather Cap (26) and slowly fill with oil until it spills out of the side

port. This is the oil fill level.

3. Replace both fittings.

4. Shut down pump.

Maintenance (Bottom Mounted Buffer)

The Rubber Flapper Check Valve is shipped from the factory fully lubricated and oil tanks filled with oil

to their proper levels ready for installation. It requires a very minimal amount of preventive

maintenance.

Special care should be taken to the exposed area of the buffer rod when painting the valve. It should

be fully masked to prevent even a small amount of paint to from getting on the buffer rod which could

damage the cylinder rod seal and cause the cylinder to leak.

A periodic (approximately 6 months) lubrication of the exposed area of the buffer rod is required to keep

the Rubber Flapper Check Valve in good operating condition. Recommended Grease: White water

proof, FDA approved LUBRIPLATE or equal.

Adjustment of Flow Control Valve

The Flow Control Valve has a micrometer type adjustment, which incorporates a color coded reference

scale to simplify setting, resetting and adjusting.

A lock nut is provided for locking the valve setting. Turning the knob clockwise closes the valve and

turning counterclockwise opens the valve and increases rate of closure of the Rubber Flapper Check

Valve. See Figure 3.

D12007

Tank pressure = Line pressure + 5 psi

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December 2012