Patent ID: 8646478
Filing Date: 2014-02-11
Classification: F16K,Y10T

Abstract:
1. A fluid flow control system for controlling the flow of a fluid through an opening in a tank having inner and outer sides delineated by an exterior surface, the system comprising: an angle valve coupled to the tank on the outer side and adjacent the opening, the angle valve including a valve seat, a valve seal adapted to engage the valve seat, and a spindle extending from the valve seal opposite the valve seat, wherein the valve seal is disposed below the outer side of the exterior surface of the tank; and a check valve coupled to the tank substantially on the inner side adjacent the opening independent of the angle valve, the check valve including a housing, a check valve seat disposed in the housing, a check valve seal disposed in the housing and adapted to engage the check valve seat, and a biasing structure disposed in the housing and adapted to bias the check valve seal into engagement with the check valve seat, the check valve adapted to engage the spindle and be moved between closed and open states by the spindle, wherein the angle valve is adapted to be independently removable from the tank allowing the check valve to maintain the fluid in the tank when the angle valve is removed, and wherein the biasing structure, the check valve seat and the check valve seal of the check valve are adapted to be removable from the housing through the opening.