Electrically and pneumatically actuated ball valves, failsafe spring or battery automatic return, modulating / proportional and standard power open power close. Various control voltages 5~6 volt DC, 9~24v AC/DC, 110vAC or 240vAC. Port sizes 1/2", 3/4", 1", 11/4", 11/2" and 2" BSP/NPT threaded or flanged ends DN15 to DN150.
Failsafe electric actuator when energised it will in turn the ball valve into the energised position where it will stay until electrical power is removed, upon which time the actuator will automatically return to its failsafe power off position without the need for any additional electrical power by means od either back up power supply or return spring.
Power open power close actuators require electrical power to move in both opena nd closed directions, upon power failure the actuator will stay in it's current position. Manual over ride facility is common allowing the valve to be opened or closed manually if need be.
Modulating or proportional actuators allow for a 0-10 volt or 4 to 20 mAmp signal to control the exact position of the valve, which can be opened in increments in direct proportion to the voltage or milliamps supplied.