Emerson Process Management Regulator Technologies, Inc.

Fisher Controls International LLC

Stanley D Hall

Tung Kim Nguyen

James Chester Hawkins

David Edward Woollums

Roman Alexandru-Vlad

Michel Bouvry

Cristian-Tiberiu Moldovan

Donald D Rice

David E Woollums

Tung K Nguyen

A slam-shut safety device includes a valve body, a valve disc, a reset pin, a and a guide collar. The valve disc is shiftable between an open position spaced away from a valve seat, and a closed position seated against the valve seat. The reset pin operatively is coupled to the valve disc and shiftable between an untripped position placing the valve disc in the open position and a tripped position placing the valve disc in the closed position. The guide collar includes a hollow cylindrical portion slidably supported in a guide bore and extending at least partly over the reset pin at a location adjacent to the valve disc. The guide collar is shiftable between a retracted position and an extended position relative to the guide bore for providing added structural integrity and protecting the reset pin from bending forces.

Slam shut safety device with guided plug support

A slam-shut safety device includes a valve body, a valve disc, a reset pin, and a guide collar. The valve disc is disposed within the valve body and shiftable along a slam-shut axis between an open position and a closed second position. The reset pin is operatively coupled to the valve disc and shiftable along the slam-shut axis relative to the valve body between an untripped position placing the valve disc in the open position and a tripped position placing the valve disc in the closed position. The guide collar includes a hollow cylindrical portion extending away from the valve disc at least partly over the reset pin and being slidably disposed in a guide bore of a slam shut body that is connected to the valve body and supporting the reset pin, thereby providing added structural integrity to the rest pin and valve disc.

Slam shut safety device with guided valve disc

An example internal relief valve disclosed herein includes a relief valve seat coupled to a first end of the relief valve stem and to engage a first side of a sensing apparatus to prevent fluid flow between the first side of the sensing apparatus and a second side of the sensing apparatus when the internal relief valve is in a closed position. A bleed hole within a surface of the sensing apparatus and separate from the opening of the sensing apparatus is dimensioned to provide a controlled flow rate between the first side and the second side of the sensing apparatus when the internal relief valve is in an open position. A seal is disposed along a body of the relief valve stem upstream from the bleed hole and the valve seat to prevent fluid flow between the first side of the sensing apparatus and the second side of the sensing apparatus via the opening of the sensing apparatus when the relief valve is in the open position.

Internal relief valve apparatus for use with fluid regulators

A regulator valve includes a spring casing and a lower casing sandwiching a diaphragm. A cylindrical orifice tube defines an inlet and terminates short of an in-line outlet port. A one piece cam stem and relief seat is mounted for movement with the diaphragm and includes cam surfaces for directly engaging a movable disk holder. The disk holder moves in a straight line in the orifice tube and the cam surfaces move the holder at a non linear rate with respect to the diaphragm. The distal portion of the orifice tube houses a boost mechanism. A movable piston in the inlet side of the orifice tube has two pairs of spirally converging grooves on its inner surface for supporting a pair of flat gates that are rotated relative to each other to vary flow area when the piston moves responsive to differences between the inlet pressure and the pressure on the underside of the diaphragm. The distal end of the orifice tube includes an end cap and a movable deflector ring that has diametrically opposed ears projecting into cutout portions of the boost tube. The deflector ring is spring biased away from the end cap and includes flow apertures in its surface. Responsive to increased flow, the deflector is moved back against the pressure of the spring to open the cutout portions and enable flow to be diverted to the underside of the diaphragm.

Pressure/flow compensated direct acting pressure regulator

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Frisco, TX, United States of America

Stanley D Hall