Qualitrol 141/146/148 series and AKM 35600/47500 Pressure Control Switch Series Provide operational control, amplitude limiting or alarm functions for transformers and load tap changers. The contacts can be factory set or adjusted as needed. When the pressure returns to the pre-set state, the quick action switch automatically resets. Pressure and/or vacuum switches can be combined on a universal manifold and protected by optional enclosures. The optional pressure indicator (dial gauge) can be used for the selected model. ☆ Characteristics ·Reliable warning for changes in rise or fall ·Compact design for easy installation ·Multiple configurations available for many applications ·On site test switch shut-off valve ·Reliable testing and certification ·Reliable quick switch automatic reset - no manual reset required ·Single Pole Single Throw (SPST) and Single Pole Double Throw (SPDT) switches UL and CSA certified · Switches can be suitable for systems using steam, air, and other non combustible gases ·For optional models, the pressure setting can be factory set and/or debugged by the equipment manufacturer. High electrical ratings for quick acting switches often save expensive relay needs Yi Option ·Operating pressure or vacuum, operating when pressure/vacuum rises or falls ·Up to 3 switches, switching test ports ·Installation method ·AKM 35600 can perform isolation testing on 3-way lockable test valve pressure switches during operation ·As an integral part, the compact 146 series switch can be installed in any direction within the control panel