Knappco Corporation

Bryan E VanDeVyvere

A vent for relieving pressure from within a storage tank at a predetermined tank pressure through an opening in the tank including a mounting member for connecting the vent in sealed engagement with the opening and for providing a valve opening and associated valve seat, a poppet member for closing the valve seat at tank pressures less than the predetermined tank pressure and for opening the valve seat at tank pressures equal to and greater than the predetermined tank pressure to enable venting of the tank pressure to atmosphere, and an adjusting member for altering the predetermined tank pressure at which the poppet member opens.

Adjustable emergency relief vent with surge protection

A high flow emergency valve contained within an interior of a storage tank having an opening and a valve seat about the opening including a housing member for sealing and unsealing the valve seat, a push rod member for engagement with and activation of the housing to seal and unseal the valve seat, the push rod including a first portion positioned within the housing and a second portion extending out of a housing aperture to the tank exterior for manipulation from the exterior of the tank to open and close the valve seat, a sleeve member for substantially enclosing the first portion of the push rod within the housing and providing sealed sliding engagement between the push rod and the sleeve, a connecting member for attaching a portion of the sleeve against movement with respect to the valve seat, an engagement member between the housing and the sleeve for sealed sliding movement of the housing with respect to the sleeve, and a biasing member for maintaining the housing in a normally closed position with respect to the valve seat and providing a spring bias to the push rod during manipulation to unseal the valve seat.

High flow internal emergency valve

A tank valve apparatus including a sealed piston assembly for regulating movement of a spring biased poppet, the poppet being in cooperative engagement with the sealed piston assembly and a valve seat of an associated valve opening, the valve opening being in communication with ambient atmosphere and pressure within the tank so that the poppet can be activated by a predetermined pressure developed within the tank to overcome the spring bias and vent the pressure to ambient atmosphere. The piston assembly includes a piston head and a flow path through the piston head for flow of material therethrough within a closed piston chamber which encloses the piston head. A snubber valve assembly is included which is carried by the piston head and contained within the closed piston chamber. The snubber valve assembly includes a shut-off disc for momentarily closing the flow path of the piston head during initial overturn of the tank thereby momentarily preventing movement of the piston head within the chamber which in turn restricts movement of the poppet and prevents venting of any surge pressure built up within the tank during the overturn. The snubber valve assembly also includes a member for moving the shut-off disc to open the flow path after a predetermined time period during which any surge pressure is dissipated within the tank in order to permit movement of the piston assembly and the poppet and venting of the valve.

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Lees Summit, MO, United States of America

Bryan E VanDeVyvere