Rotatable refrigerated valve

Details Rotatable refrigerated valve Rotatable refrigerated valve

1977-02-09

1978-10-03

Capossela, Ronald C.

Refrigeration

Low pressure cold trap process and apparatus

55DIG15, 137340, 251315, B01D 500

Patent

active

041176944

ABSTRACT:
A ball valve for use in a vacuum pumping system has the passage through the valve element provided with a series of metal plates disposed for contact by gas passing through the valve when open. A refrigerant conduit entering the passage through the neck of the valve element by which it is turned between open and closed positions includes a U-shaped portion within the passage with which the plates are in thermal contact and the conduit then exits through the neck. The valve casing has sealed clean-out ports through which the passage is accessible when the valve is closed thus permitting the thus established cold trap to be serviced without losing vacuum in the chamber being exhausted, the valve monitored, and the passage rough-pumped.

REFERENCES:
patent: 2890017 (1959-06-01), Shafer
patent: 3014491 (1961-12-01), Reynaud
patent: 3019809 (1962-02-01), Ipsen et al.
patent: 3636972 (1972-01-01), Scaramucci
patent: 3647344 (1972-03-01), Skibo et al.

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