Diaphragm valve with means for adjustably setting the maxium val

Details Diaphragm valve with means for adjustably setting the maxium val Diaphragm valve with means for adjustably setting the maxium val

1997-07-11

1998-10-20

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Diaphragm

251285, F16K 3100

Patent

active

058235094

ABSTRACT:
A diaphragm valve has an adjustment device for precisely setting maximum valve lift. A bushing threaded into the bonnet clamping the diaphragm within the valve body forms at its inward end an axially facing engagement surface which is engaged by an outwardly, axially facing engagement surface formed by a shoulder on the valve stem. The bushing can be threaded in or out without disassembling the entire valve to adjust the maximum lift to the precise setting desired. The bushing is then locked in place such as by a thread adhesive. Alternatively, the bushing can be threaded on the valve stem and be provided with a radial flange forming the axially facing engagement surface which engages a shoulder on the bonnet.

REFERENCES:
patent: 2977981 (1961-04-01), Jarrett
patent: 4776562 (1988-10-01), Kalaskie et al.
patent: 5048554 (1991-09-01), Kremer
patent: 5516078 (1996-05-01), Wellener, III et al.

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