Also known as proportional V-ball valves, these have a motor that adjusts and regulates flow in applications with higher flow rates and pressures than solenoid valves. As you increase the intensity of the electrical signal, the motor opens the valve, moving a ball with a V-cut opening that proportionately allows more flow as the valve opens. They're often integrated into PLC systems for automatic control over the valve position based on system conditions. Valves can accept both 4-20 mA current and 0-10 DC voltage. All are fail open unless actuated. They don't require a minimum pressure drop between the inlet and outlet for operation. All are full port, so they do not restrict flow.

The three-piece bolted body comes apart for access to internal components without unthreading pipe connections and removing the valve from your line. It is 316 stainless steel for excellent corrosion resistance. The actuator is secured to the valve body with a bracket for easy disassembly, maintenance, and repair. A visual flow indicator on the top of the actuator shows whether the valve is open or closed. Two single pole, double throw (SPDT) auxiliary switches allow you to connect these valves to temperature-monitoring equipment, programmable logic controllers, or conveyor sirens. The internal heater automatically turns on when the valve is actuated to prevent motor damage caused by condensation buildup. A manual override allows you to operate the valve during power outages.