Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1994-02-16
1996-02-20
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137510, G05D 1608
Patent
active
054921465
ABSTRACT:
A sanitary pressure regulator comprises a pressure sensing chamber, downstream of an orifice, has its upper portion defined by a diaphragm. A valve stem, mounted on the diaphragm, extends downwardly through the orifice and has a plug disposed on the upstream side of the orifice. A valve spring, is disposed in a spring housing and acts through a lower spring retainer to yieldingly resist movement of the valve plug to a position which would restrict fluid flow. The spring housing, compression spring and lower retainer form a unit which can be mounted on and detached from a passage housing. The valve stem is mounted on the diaphragm by a nut which is threaded onto a portion of the stem which projects above the diaphragm. Provision is made to lock the valve stem in an open position to facilitate the use of high pressure fluid in cleaning the regulator. In an alternate embodiment, the valve stem is axially fixed relative to the lower spring retainer and a disc engages the lower surface of the diaphragm. In another embodiment, the valve plug is yieldingly maintained in engagement with the outlet from the orifice to regulate. This embodiment also employs a compression spring and lower spring retainer mounted in a spring housing and further has means for permitting the compression spring to assume its free length so that a second spring, acting on the spring retainer, can dispose the valve stem in an open position and the regulator drained.
REFERENCES:
patent: 1349443 (1920-08-01), Stokes
patent: 2301031 (1942-11-01), Ferguson
patent: 4516595 (1985-05-01), Acomb
patent: 4621658 (1986-11-01), Buezis et al.
patent: 5070901 (1991-12-01), Black
Garrison Timothy M.
George John A.
Ostand Paul R.
Hepperle Stephen M.
Richards Industries, Inc.
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