Diaphragm valve air vent device for water systems

Details Diaphragm valve air vent device for water systems Diaphragm valve air vent device for water systems

1979-03-13

1981-11-10

Cohan, Alan

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137414, F16K 3134

Patent

active

042992486

ABSTRACT:
An air vent device for automatically venting entrapped air from hot water heating and chilled water cooling systems. The device can vent a large volume of air in a relatively short time by using a large vent opening, controlled by a pilot valve operated diaphragm venting valve. The pilot valve, actuated by a spring and connected to a float, permits air pressure within the device to pass to the rear of the diaphragm valve to maintain it in a closed position during normal operation of the system. When the float drops to a predetermined position the float weight overcomes the spring force and the pilot valve vents the rear side of the diaphragm valve to atmosphere, allowing it to open, thereby venting the air collected in the device to atmosphere.

REFERENCES:
patent: 2849016 (1958-08-01), Nations
patent: 3319913 (1967-05-01), Schoepe
patent: 3428966 (1969-02-01), Schoepe
patent: 3429333 (1969-02-01), Schoepe
patent: 3495803 (1970-04-01), Schoepe
patent: 3576199 (1971-04-01), Schoepe
patent: 3624893 (1971-12-01), Schoepe
patent: 3626574 (1971-12-01), Schoepe

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