All pressure information in the data sheets for Bürkert equipment is gauge pressure information above the relevant atmospheric pressure prevailing (relative pressure). The pressure information is specified in bar. In English-speaking countries, 1 bar = 14.2 psi (pounds per square inch). If using direct-acting solenoid valves in vacuum applications, it must be ensured that the partial vacuum is on the service port side. The higher pressure or the atmospheric pressure must be applied to the pressure inlet.
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