The Burkert proportional solenoid valve is capable of continuously adjusting and smoothly controlling the flow rate of the passing liquid. Unlike conventional solenoid valves and process valves that only provide on/off control, the Burkert 2875 series process valves can adjust the flow rate up to 0~ 100% using PWM (pulse width modulation). The design features such as a friction-free valve plunger for very precise adjustment and a highly sealed elastomer seat make this valve ideal for demanding, high-precision control.