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AssigneesAndrene Associates, Martin R. Asbra
InventorsMartin R. Asbra, Andrew F. Asbra, Nicholas J. Bovis
Estimating the term…
An air actuated valve system for shutting off fluid flow in a fluid conduit includes a seismic valve disposed in a seismic air circuit which is coupled to a primary air circuit. The primary air circuit delivers air at a high pressure to an air driven actuator which maintains a shut off valve in a fluid conduit in an open position. The high air pressure flows through an air switch which is operationally open and coupled to the seismic air circuit such that when the seismic valve is closed a pilot air pressure is prevented from flowing to the air switch. In the absence of the pilot air pressure, air pressure is bled from the air switch, causing the air switch to move from an open to a closed position, thus preventing air from flowing to the air actuator.
An air actuated valve system for shutting off fluid flow in a fluid conduit, comprising:
An air actuated valve system according to claim 5, wherein the primary air circuit further includes a low air pressure warning system for indicating a condition of low air pressure in the primary air conduit.
An air actuated valve system according to claim 8, wherein the electrical component further includes a test circuit for checking the operational status of the air actuated valve system.
An air actuated valve system according to claim 11, wherein the seismic valve has two valve assemblies, each including a valve body defining a substantially vertically oriented chamber and a valve element supported in an upper portion of the chamber and having a outer sidewall and being operative to fall into a lower portion of the chamber to block airflow when exposed to sufficient seismic activity, and wherein the at least one venting valve includes first and second venting valves, each including a body having one end threadedly received in a bore provided in a corresponding valve body of the seismic valve, an opposite end coupled to a corresponding vent line, a longitudinal passageway, a valve seat in the passageway, a valve stem movably mounted in the venting valve body and having a valve at one end for seating over the seat and an opposite end which is coupled to a magnetic member, the valve being movable from a seated position on the valve seat by magnetic attraction of the magnetic member to the valve element of the valve assembly of the seismic valve.
Dependencies are inferred from the claim text.