Diaphragm valve

Details Diaphragm valve Diaphragm valve

1997-09-03

1999-05-04

Lee, Kevin

Valves and valve actuation

Reciprocating valve

Diaphragm

251 611, 92 96, F16K 31126

Patent

active

058994408

ABSTRACT:
A diaphragm valve having a diaphragm functioning as a valve body. Unlike the conventional valve of this type, the retainer for pressing the sealing section of the diaphragm against the valve seat is provided with a predetermined number of rectangular apertures or concave portions at specified positions thereon so that when the valve is operated in a low temperature atmosphere or a high temperature atmosphere, the diaphragm is prevented from sticking firmly to the valve sheet due to freezing or heating thereby allowing the valve to perform an accurate valve opening operation without changing its pressure and flow rate characteristics.

REFERENCES:
patent: 4715578 (1987-12-01), Seltzer
patent: 5529280 (1996-06-01), Satoh et al.

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