Valve seal mechanism

Details Valve seal mechanism Valve seal mechanism

1998-05-27

2000-03-21

Hepperle, Stephen

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137505, 13759617, 251333, G05D 1602

Patent

active

060390719

ABSTRACT:
When a valve body of a pressure-reducing valve is displaced in the direction indicated by the arrow B, a seal pad of a valve seal mechanism on the valve body abuts against a ridge on a seat, which enters the seal pad to provide a seal therebetween. When the ridge enters the seal pad by a distance, abutment surfaces of holders on the seat are held against the seal pad, preventing the ridge from entering the seal pad beyond the distance. The distance by which the ridge enters the seal pad is thus made constant. The ridge is spaced from the abutment surfaces by a groove, which communicates with a primary port through grooves between the holders, keeping a constant valve sealing area. The pressure-reducing valve which incorporates the valve seal mechanism has a constant quality level.

REFERENCES:
patent: 2621011 (1952-12-01), Smith
patent: 2695032 (1954-11-01), Kmieck
patent: 2904072 (1959-09-01), Palen
patent: 4249717 (1981-02-01), Thompson
patent: 5452741 (1995-09-01), Tomita et al.

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