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| RUBBER FLAPPER CHECK (ANGLE SEATING) | ||
| The Rubber Flapper Check is another style of Swing Check Valve and further attempt to improve the shut off characteristics of the conventional Swing Check Valve. The seating arrangement in this valve is the key to its success. The seat is on a 45 degree angle and therefore the flapper travels only 35 degrees to reach full open position. With this short stroke, the valve is capable of very fast shut off, before reverse flow can develop, and hence does not slam. |  | |
| The flapper is one piece Buna-N compression molded to specific Durometers to satisfy tight shut off at low pressures. The flapper is steel reinforced, but no metal is exposed to the media. Don't be mislead by the cross-sectional drawing Fig. 3., the flow thru area is not restricted; in fact, the area thru this style valve is equal to or greater than the equivalent pipe size. This is accomplished by enlargement of the flow area immediately downstream of the flapper. | ||
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