Double disk gate assembly for block and bleed type valves

Details Double disk gate assembly for block and bleed type valves Double disk gate assembly for block and bleed type valves

1996-12-18

1998-03-03

Vox, John

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251203, F16K 314

Patent

active

057226369

ABSTRACT:
A valve gate for sealing the inlet from the outlet of a block and bleed type valve consists of two independent disk-like members which are interconnected by a slide mechanism allowing the disk-like members to be moved simultaneously forwardly in a first configuration, to be moved simultaneously rearwardly in a second configuration and to float and, in a specially preferred embodiment, to pivot with respect to each other between the first and second configurations so as to facilitate release of the disk-like members from the valve seat on withdrawal. An upper disk-like member to seal the inlet and a lower disk-like member to seal the outlet are connected by one or more members engaging mounting frames fixed thereto. One of the mounting frames is connected to the valve stem for horizontal movement of one of the disk-like members into and out of substantial registration with either the inlet or the outlet in response to operation of the valve stem. The frames are engaged for relative horizontal movement of the other disk-like member into and out of approximately substantial registration with either the outlet or the inlet and for relative limited floatation and pivoting of one of disk-like member relative to the other into and out of substantial registration with either the outlet or the inlet.

REFERENCES:
patent: 983960 (1911-02-01), Watson
patent: 2394128 (1946-02-01), Wennerby
patent: 2502689 (1950-04-01), Yant
patent: 2541968 (1951-02-01), Laurent
patent: 3198478 (1965-08-01), Johnston
patent: 4301993 (1981-11-01), Waller

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