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コントロールユニット Cameron Demco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。Cameron Demco 11 ページ。 Resilient-seated butterfly valve

INSTALLATION AND OPERTAION INSTRUCTIONS

DEMCO Resilient Seated Butterfly Valves are bi-directional and will operate in any position. Normally the valve is

installed with the upper stem pointing upward (Figure 5). Elevated valves with gear operators and chain wheels

should be installed with the upper stem pointing down (Figure 6) so the open-closed indicator is visible from the

ground and the chain does not drag on the pipe.

The following procedure applies to new installation between standard ASME pipe flanges.

1. When replacing a valve from an existing installation, clean the flange faces and check for excessive

corrosion or other damage to the sealing face of the flange.

2. Remove the valve from any packaging material. Close the valve disc so that it is contained within the

flange faces. It is not necessary to fully close the valve; the disc must be contained within the confines of

the valve body so it will slip between the mating flanges without contact with the flanges.

3. When installing wafer body valves, install the lower flange studs without tightening. Position the valve

between the flanges, within the pocket formed by the flange studs. (The OD of the wafer body is equal to

the inside of the bolt circle of the flanges, so the valves are self-centering). Install the remaining flange

studs.

4. Lug bodies have tapped holes coinciding with those in the flanges. They should be positioned between the

flanges and the capscrews inserted through the flange holes into the threaded lug holes.

5. Tighten all nuts/capscrews in a crossover or star pattern to assure even sealing. Tighten sufficiently to

assure metal-to-metal contact between the flange face and the metal butterfly valve body. No further

tightening is required.

6. Carefully check disc clearance by placing the valve in the full open position. Any binding or scraping should

be investigated and corrections made.

TC-003001-01 / Rev 2

Figure 5

Figure 6