NOAH SERIES NA ON/OFF

Standard enclosure with o-ring sealing is watertight to IEC IP67, NEMA 4 and 6. the actuator is available with optional explosion proof enclosure. WIRING Electric wiring of control circuit is standardized for single and three phase power supply in a single module. Multiple terminal contacts sufficiently cover additional requirements such as auxiliary contacts for interlocking and other options. COMPONENT ARRANGEMENT Mechanical and electrical module can be separated easily to improve assembling, maintenance and alteration od electrical requirements. Actuator has enough internal space for optional accessories. HAND WHEEL Size of hand wheel is designed for safe and efficient emergency manual operation. MANUAL OVERRIDE Hand / auto declutching lever for hand wheel engagement. The power drive is automatically restored by motor start. ADAPTION Base mounting is standard to ISO5211. Drive bushing os removable for maching to valve stem requirement. The actuator position on the valve can be selected for 4 positions by means of 4 bolt holes in the drive bushing. HEATER A space heater inside the actuator prevents condecsation due to temperature and weather changes. Standard 20W heater keeps all electrical components in the actuator clean and dry. LIMIT SWITCHES The limit switch is activated by means of a simple and yet reliable cam mechanism mounted and driven by the center column. The valve position can be accurately and easily set with the simple adjustable switch mechanism. The set position is permanent and is not affected by over-treval resulting form manual operation. TORQUE SWITCHES Cam activated torque switches are easily adjustable to provide over-load protection. SELF LOCKING Rolled steel wormgear on aluminium bronze wormwheel self locking to prevent valve back drive on control signal or power