Fluid handling – Destructible or deformable element controlled
Patent
1992-07-30
1994-06-07
Schwadron, Martin P.
Fluid handling
Destructible or deformable element controlled
251282, F16K 1700
Patent
active
053180607
ABSTRACT:
An emergency shutoff valve for monitoring fluid flow rate and closing a fluid conductor in the event of fluid flow increase above a predetermined value. The valve body contains a valve seat and a normally open valve head for seating on the seat and includes opposing valve stems each slidably supported, at one end portion, by the body. The valve head is fluid pressure balanced by equal upstream and downstream stem cross sectional areas. A plate is secured to the body by posts in axial spaced relation with respect to the downstream outwardly projecting end portion of one valve stem for supporting a pressure collapsible rod-like pin axially interposed between the plate and the valve stem. A valve stem bushing permits positioning the valve head relative to the seat for the purpose of changing the critical rate of flow required to impinge on the valve head resulting in an axial force on the valve stem that collapses the pin.
REFERENCES:
patent: 2921603 (1960-01-01), Lofink
patent: 3025881 (1962-03-01), Freeman
patent: 3716069 (1973-02-01), Reynolds
patent: 4688601 (1987-08-01), Astill
patent: 4724857 (1988-02-01), Taylor
patent: 5012834 (1991-05-01), Taylor
patent: 5062452 (1991-11-01), Johnson
patent: 5067511 (1991-11-01), Taylor
Lee Kevin L.
Rhea Robert K.
Schwadron Martin P.
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