Diaphragm valve

Details Diaphragm valve Diaphragm valve

1982-05-27

1985-03-19

Rosenthal, Arnold

Valves and valve actuation

Limit stop

Adjustable

251331, F16K 716

Patent

active

045054517

ABSTRACT:
A rising-handwheel diaphragm valve is provided with means serving to protect the diaphragm (3) against damage by excess closing pressure. For this purpose the valve spindle (4) is provided with external screw thread (43) along its entire top portion, and the handwheel (6) is translationally movable along the spindle on a central screw-threaded bore (65). The spindle (4) is perforated near its top by a transverse bore (44), and the handwheel (6) has a raised hub (63) crossed by two transverse grooves (64), permitting the handwheel (6) to be fixed to the spindle (4) at the desired level by means of a horizontal pin (7) engaging both with the bore (44) and one of the grooves (64). The handwheel (6) is also provided with a downwardly extending collar (62) which contacts--at the desired lowermost position of the spindle--an annular planar surface (13) on the bonnet (1) of the valve casing, thus preventing undue pressure on the diaphragm (3 ).

REFERENCES:
patent: 2540371 (1951-02-01), Jacobsen
patent: 3175473 (1965-03-01), Boteler et al.
patent: 3633874 (1972-01-01), Veugelers
patent: 4014514 (1977-03-01), Priese et al.

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