The Mark 5800HP is a high pressure, back pressure regulator designed to maintain upstream pressure of gases and liquids. As a compact, lightweight product, it is well suited for applications where space and weight are at a premium.

With robust, piston design, the MK5800HP can handle setpoints up to 2500 psig (172 bar) at 450°F (232°C) with ease and the large flow capacity for a vale of this style is among the highest in the industry. The T-bar adjusting handle allows for a lighter spring and more sensitive regulator than those models with a fixed knobs. This added sensitivity contributes greatly to the accuracy of the valve.