Ashcroft GPDN4KKT25 Pressure Switch Three Quarters Inch 400 PSI 125 250 VAC

Ashcroft GPDN4KKT25 pressure switch is a rugged NEMA 4 (and 4X/IP66-capable) control from the Ashcroft GP-series, engineered for harsh industrial environments with a 316L stainless steel housing that resists corrosion and offers durable protection in demanding applications. The GPDN4 designation indicates two independent adjustable setpoints with a fixed deadband, enabling reliable high-low control or alarm functions in a single compact unit. It accommodates a wide range of wetted-diaphragm options (Buna N, Viton, Teflon, Monel) to suit chemical compatibility and process media, while maintaining accuracy and repeatability across process conditions. The GP-series family is specified for pressure ranges from vacuum up to as high as several thousand psi, making it suitable for diverse process-control tasks, safety shutdowns, and monitoring in industries such as refining, chemical processing, power, and water treatment. This model carries standard safety and compliance credentials including UL, CSA, CE, CRN, and 3A approvals, along with RoHS and NSF-61 compliance, underscoring its suitability for regulated environments. In practice, technicians select Ashcroft’s GPDN4 variants when a single instrument must provide dual-setpoint control with a fixed deadband, robust construction, and versatile diaphragm materials to match the specific media and temperature requirements of the application.