Dual Seat Valve

Abstract

A dual seat valve assembly includes a first valve and a concentric second valve which together form a tight seal valve assembly. The valves open and close sequentially. A quick disconnect rupture disc assembly may be used in conjunction with the valve assembly to provide a required safety feature for testing high pressure fluid ruptures that include a dump valve.

What is claimed is: 
     
         1 - 9 . (canceled) 
     
     
         10 . A dual seat valve assembly comprising:
 a first and second front housing member comprising an interior, wherein the interior of the first housing member comprises a bore comprising a first valve seat surrounded by an annular ring member, wherein the annular ring member comprises a second valve seat;   a central housing member;   a hydraulic actuating assembly, wherein the hydraulic actuating assembly comprises fluid inlets and outlets to allow for an in-take and removal of pressurized water within the hydraulic actuating assembly;   a piston wherein the in-take and removal of pressurized water within the hydraulic actuating system axially moves the piston; and   a rupture disc assembly.   
     
     
         11 . The dual seat valve assembly of claim  1 , wherein the annular ring is secured to the interior of the first housing by a retainer ring, wherein the retainer ring comprises a beveled section. 
     
     
         12 . The dual seat valve assembly of claim  1 , wherein the hydraulic actuating assembly and a space plate are secured to the central housing. 
     
     
         13 . The dual seat valve assembly of claim  1 , further comprising a hollow sleeve member, wherein the hollow sleeve member comprises an aperture and is threadably attached to the piston. 
     
     
         14 . The dual seat valve assembly of  claim 13 , wherein a front surface of the hollow sleeve member is configured to engage the second valve seat. 
     
     
         15 . The dual seat valve assembly of  claim 13 , further comprising a plunger that extends through the aperture and is configured with a frusto-conical valve surface to engage the first valve seat. 
     
     
         16 . The dual seat valve assembly of  claim 15 , wherein a plurality of springs is disposed between the plunger and the piston to normally bias a flange of the plunger to an inner surface of the hollow sleeve member. 
     
     
         17 . The dual seat valve assembly of  claim 16 , wherein the hollow sleeve member, the piston, the plurality of springs, and the plunger move axially with respect to each other. 
     
     
         18 . The dual valve assembly of  claim 17 , wherein the axial movement is capable of engaging or disengaging the plunger to or from the first valve seat. 
     
     
         19 . The dual valve assembly of  claim 17 , wherein the axial movement is capable of engaging or disengaging the hollow sleeve member to or from the second valve seat. 
     
     
         20 . The dual seat valve assembly of  claim 10 , wherein the interior of the second front housing member comprises a chamber. 
     
     
         21 . The dual seat valve assembly of  claim 20 , wherein the interior of the second front housing member further comprises an outlet passageway to allow fluid to exit the chamber. 
     
     
         22 . The dual seat valve assembly of  claim 20 , wherein the bore of the first front housing member is connected to the chamber to allow fluid to enter the chamber. 
     
     
         23 . The dual seat valve assembly of  claim 10 , wherein the second front housing member comprises an inlet leading to a passageway disposed within the interiors of the first and second front housing members. 
     
     
         24 . The dual seat valve assembly of  claim 23 , wherein the passageway connects the inlet of the second front housing member to the bore of the first front housing member. 
     
     
         25 . The dual seat valve assembly of  claim 10 , wherein the rupture disc assembly is disposed on a top portion the second front housing member. 
     
     
         26 . The dual seat valve assembly of  claim 10 , wherein the rupture disc assembly comprises a fluid inlet and a fluid outlet to allow for fluid to move through the second front housing member to the rupture disc assembly.