Gate valve

Details Gate valve Gate valve

1987-07-07

1988-05-10

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251329, 138 943, F16K 3316

Patent

active

047429909

ABSTRACT:
A sliding plate of a gate valve is guided in guide grooves formed in the region of a flow passage of the two-part gate valve housing. Each guide groove is bounded on both sides [upstream and downstream] by guide strips which extend into the flow channel. The guide strips have axially outwardly directed chamfers, and each such strip has a circular arcuate shaped recess. The recess, which starts at the upper entry point of the guide groove into the flow channel, extends to the lower third of the guide strip. The maximum depth of the recess is 3-5 mm less than the depth (t) of the guide groove 4b. The guide grooves 8a, 8b provide problem-free guiding of the sliding plate when said plate is moved to its closed position, particularly when said plate is moving through the lower third of the flow channel; nonetheless, the guide grooves 8a and 8b present only minimal flow resistance. When the sliding plate is being closed, material which may have deposited in the relatively short parts of the grooves which parts are not affected by the recess, can be expelled without problems via the closing-edge of the sliding plate.

REFERENCES:
patent: 3662778 (1972-05-01), Leopold et al.
patent: 3945606 (1976-03-01), McDonald

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