Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1990-12-03
1992-04-28
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
251331, F16K 1608
Patent
active
051078872
ABSTRACT:
A fluid pressure regulator provides features which enable an extended regulator life in high pressure service. Dual flexible diaphragms provide chemical resistance in contact with the working fluid and abrasion and fatigue resistance in contact with a backup plate and piston assembly. The backup plate has a bore which is sufficiently long and close fitting with the piston so that axial alignment is assured and there is minimal tendency for the piston to become cocked within the bore. Provision is also made for preventing fretting corrosion between the piston and the backup plate by coating at least one of the surfaces, if necessary, to assure that dissimilar metals only are in contact in that couple. Seals between the regulator housing body and the diaphragm and between the valve stem and diaphragm may be provided by resilient seal rings or by annular protrusions integrally formed on one or both of the diaphragms.
REFERENCES:
patent: 1712697 (1929-05-01), Frankenberg
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patent: 3812877 (1974-05-01), Fleishhacker et al.
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patent: 4246931 (1981-01-01), O'Connor
patent: 4776368 (1988-10-01), Drozd
patent: 4887639 (1989-12-01), Lewis et al.
Altman John P.
Pietrykowski Gabriel J.
White Lawrence W.
Hepperle Stephen M.
Palermo Robert F.
The Aro Corporation
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