Anti-contaminant diaphragm valve

Details Anti-contaminant diaphragm valve Anti-contaminant diaphragm valve

1976-10-26

1978-12-19

Rosenthal, Arnold

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

251 30, 251 45, F16K 31385

Patent

active

RE0298638

ABSTRACT:
The solenoid plunger normally closes the center vent hole in the diaphragm so inlet pressure is applied through the bleed hole to the space above the diaphragm resulting in enough pressure to close the diaphragm on the valve seat. When the solenoid is actuated, the plunger is lifted, allowing water to flow through the vent faster than it can flow through the bleed hole. This lowers the pressure above the diaphragm so inlet pressure can move the diaphragm from the seat and full flow can take place. The bleed hole is quite small. To prevent entrained particles from reaching and plugging the bleed hole, an arcuate groove having a width less than the bleed hole diameter is molded into the diaphragm to trap particles in the groove and prevent the particles from reaching and closing the bleed hole.

REFERENCES:
patent: 3459403 (1969-08-01), Royer
patent: 3593957 (1971-07-01), Dolter

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