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

An on-off valve and pressure regulator for high-pressure fluid comprising:

• a valve body defining a cavity with an upstream cavity end and a downstream cavity end, said valve body further defining a fluid inlet in communication with said cavity, a valve seat defining a discharge port, said discharge port in communication with said valve cavity at said downstream cavity end, a stem seal defining a stem seal through hole, a seal cage defining a seal cage through hole, said seal cage sealably mounted within said upstream cavity end of said valve body, said stem seal sealably secured within said seal cage, a seal support having a seal support through hole, said seal support secured within said valve body and retaining said stem seal and said seal cage within said valve body, said seal cage through hole, said seal support through hole and said stem seal through hole in communication with said valve cavity, a stem collar having a stem collar cavity, a valve poppet mounted with respect to said stem collar for engaging said valve poppet into and out of a seated position with respect to said valve seat, a valve stem having a stem shoulder at a downstream stem end of said valve stem, engagement means for engaging said stem shoulder with said stem collar to move said valve poppet in a linear direction, bias means for constantly forcing said valve poppet toward said valve seat, said valve stem mounted within said seal cage through hole, said seal support through hole and said stem seal through hole;
• and
• an actuator secured to said valve body, a valve stem anchor slidably mounted within said actuator, an upstream stem end of said valve stem secured to said valve stem anchor, said actuator comprising an actuator body defining a chamber and an actuator body through hole, a piston rod slidably and sealably mounted within said actuator body through hole, an upstream rod portion of said piston rod secured to a piston and a downstream end of said piston rod secured to said valve stem anchor, said piston sealably and slidably mounted within said chamber, and movement means for moving said piston and said valve stem.