Siemens 69JG109923R Pressure Switch With Unloader Valve And Lever

Siemens 69JG109923R is a pressure switch with an integrated unloader valve and a manual lever, designed to control the on/off cycle of a reciprocating air compressor. As part of the 69JG family, it senses tank pressure to energize and de-energize the compressor, while the unloader valve vents residual pressure at cutout to ease startup and reduce wear on start components. The lever provides a manual cut-off for servicing or testing without energizing the unit. Market listings show the 69JG109923R variant is sold with the unloader valve and lever, indicating its suitability for installations requiring automatic cycling plus discharge-pressure relief. Commonly used in compact to mid-size compressor setups, this switch-and-valve combination supports straightforward installation with standard air‑compressor plumbing and routine safety practices during maintenance. When integrating this part, verify compatibility with your compressor’s connections and electrical configuration, and follow manufacturer guidelines for safe handling of pressurized equipment.