Mark 708 – a complete line of pneumatic and electric control valves developed specifically for the unique properties and conditions encountered in fractional flow services.
The 1/4" JRPH Series are piston operated, balanced trim pressure regulators with high pressure capability and PEEK or KEL-F soft seat for ANSI Class VI shutoff.
The Mark 708 with bellows stem seals that eliminate fugitive emissions by surrounding the valve stem with a pressure-tight barrier, isolating the stem from the process fluid and preventing leakage to the atmosphere.
The Mark 708 for cryogenic service features a 9” bonnet extension that provides protection for the packing and actuator by preventing ice build-up, which can interfere with movement of the valve stem and affect valve performance.
The Mark 708 with double packing is an alternative to a bellows stem seal and is used when standard packing will not adequately contain the controlled media.
THe Mark 708HT Series has a cooling fin bonnet option for protection of the stem packing from elevated temperatures associated with steam, hot water and high temperature oil, gas and liquid services.
A Mark 708 valve with a high resolution, low hysteresis digitally controlled motor that offers extreme accuracy, high turndown ratios and repeatability.
A Mark 708 valve with a high resolution, low hysteresis digitally controlled motor that offers extreme accuracy, high turndown ratios and repeatability.
