On-off valves and pressure regulators for high-pressure fluids

Abstract

A fast-actuating on-off valve and pressure regulator particularly well-suited for use with high-pressure incompressible fluids. An actuator, manually-operated or powered, provides a linear push-pull force to a valve stem assembly mounted inside a valve cavity having a fluid inlet and one or more fluid outlets which are arranged axially and concentric with respect to the valve stem. The valve stem assembly includes a valve stem that has a shoulder at one end, with or without an extension. One or more stem springs are positioned concentrically with respect to the valve stem and are capable of sliding along the valve stem and the extension of the valve stem. The valve stem assembly includes one or more stem collars each having a capped end with a central hole to engage the valve stem, a cylindrical cavity to house the stem shoulder, and a threaded portion engageable with a valve poppet. Each valve poppet has a threaded end engageable with the stem collar and a sealing end to engage with a fluid outlet centrally positioned within a valve seat or a valve poppet. The end of the valve stem can engage a power piston of an actuator or a valve trigger of a manually-operated actuator to allow sliding motion along the valve stem assembly for opening or closing the fluid outlets and thus controlling fluid flow or for regulating fluid pressure.