The MR98H Series are used in a variety of steam back pressure / relief applications, such as power generation, heating and cooling systems, and process systems.
The Type 98HD uses additional loading pressure to maintain relief differential pressure settings. This back pressure / relief valve is used for differential control in steam applications, such as steam atomization of fuel gas for a boiler.
The 98L Series are direct-operated back pressure/relief valves that are used in a variety of liquid or gas applications, such as pump recirculation, general back pressure, and relief applications. The Type 98LD uses additional pressure loading to maintain relief differential pressures or back pressure.