Two-way servo assisted
A two-way servo-assisted solenoid valve uses medium pressure together with a solenoid pilot to move the main closure. Dependence on pressure conditions distinguishes it from direct acting, but no universal minimum differential or operating range can be inferred from the title. Flow direction, working pressures, pilot orifice, medium, and behaviour during pressure loss require the actual datasheet.
Application and duty
Two-port switching where the product's required differential and flow direction are available