Heat exchangers of the HS range areused to cool process/barrier fluids inseal supply circuits. HS heatexchangers are available in twostandard sizes and are API 682conform. The process/barrier mediumis directed through the tube and thecooling medium through the shell.For simple draining or venting of thecooling water side, the heat exchangercan also be supplied withventilation/drainage ball valves. Inaddition, the heat exchangers can alsobe combined with a temperatureinstrument in the supply line to themechanical seal (optional inaccordance with API 682).Circulation in accordance with API 682/ ISO 21 049: Plan 21, Plan 22, Plan23, Plan 41