High Pressure reducing regulators rated up to 6000 psi or in some cases 7000 psi. Spring/hand loaded and dome loaded versions available in different outlet pressure ranges, flow capabilities and materials.
High pressure components to relieve compressor's inter-stages or toggle a switch at a preset pressure. Unloaders allow a compressor's interstages to drain when the compressor is shut down so it can be restarted. Pressure switches are ususlly used to turn on or off a compressor at a predetermined pressure.
High pressure gas or fluid flow components used to limit flow. Check valves are one-way valves. Flow fuses are used to choke flow in the event a fill hose breaks. Flow orifices limit flow to a predetermined amount determined by the orifice size.