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コントロールユニット DeZurik APCO 100SAのPDF インストレーション、オペレーション、メンテナンスマニュアルをオンラインで閲覧またはダウンロードできます。DeZurik APCO 100SA 14 ページ。 Rubber flapper swing check valves

Operation

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5. Start pump. While valve is opening, visually ascertain that buffer rod fully extends into the valve

body. If not, pressurize hydro-pneumatic tank until it does. The chart below shows the

maximum stroke length of the buffer rod for the following sizes:

Valve size

Buffer Rod Stroke

6. Shut-off pump and observe rate of closing. Based on this initial run, make necessary

adjustments to the flow control valve and/or the internal cushion needle valve until satisfactory

closing is achieved.

A split collar is mounted on the buffer rod to lock it in place when it is necessary to disconnect the

cylinder for repairs while the pump is running. In very rare cases however, it can be used to shorten

the buffer rod stroke when the system demands higher percentage of free fall closing of the flapper.

The Rubber Flapper Check Valve with bottom mounted buffer has two controlling stages in the closing

cycle. The flow control valve controls the first stage of flapper closure and the secondary control is the

internal cushion needle valve which controls the remaining 20% of the buffer stroke.

December 2012

APCO CRF Rubber Flapper Swing Check Valves

4" 6" 8" 10" 12" 14" 16" 18" 20" 24" 30" 36" 42" 48"

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Figure 2 – Bottom Mounted Buffer Assembly

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