Switch-over valve, preferably for an air drier

Details Switch-over valve, preferably for an air drier Switch-over valve, preferably for an air drier

1987-12-22

1988-12-27

Cohan, Alan

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

13759618, 1375962, F16K 1110

Patent

active

047933801

ABSTRACT:
A switch-over valve for directing a compressed air flow to either one of two drying towers of an air drier, the other one being vented to the atmosphere through the valve. A positively operated valve body is movable between two valve seats in a central chamber. A valve sleeve arranged at either side of the valve body is axially movable in a dividing wall between the central chamber and a respective outer chamber connected to the drying tower, is spring biased in a direction towards the valve body to a position where a radial valve sleeve flange in the outer chamber is in sealing contract with the wall, and is biased in the opposite direction by the valve body for lifting the flange from the wall and venting out the air from the outer chamber to the atmosphere through a channel in the wall.

REFERENCES:
patent: 3270774 (1966-09-01), Stuart
patent: 3643402 (1972-02-01), Wireman
patent: 3692367 (1972-09-01), Kuromitsu
patent: 4117865 (1978-10-01), Beck

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