The 522 LL90 Mechanical Valve with 5/2 bistable, G 1/4, is a pneumatic valve produced by PNEUMAT SYSTEM. It features two output ports, allowing for the switching of pressure ports in response to a signal. It is a bistable valve, meaning it can be in two separate positions depending on the signal it receives from an external unit. The valve is also compatible with pressures ranging from -0.9÷10bar. This valve can be used to control the flow of pneumatic liquids or gases within an automation system.