July 31, 2014 - Centork releases CK modular electric valve actuation system designed to deliver a highly reliable, economical and flexible solution for duties and applications of all descriptions in many industries. Centork CK actuators provide isolating or modulating control of multi-turn, part-turn or linear valves. Operating from single-phase or three-phase electrical supplies, all actuators are environmentally sealed to IP68 as standard for long-term reliability in harsh operating conditions. Plug and socket connections for power supplies and between modules assist swift site wiring and provide a simple connection platform for upgrades and modifications.
The modular construction presents a wide range of options and features, enabling each actuator to closely match its specific valve duty and function. The choice ranges from basic actuators requiring separate motor controls to sophisticated versions equipped with the state-of-the-art Centronik intelligent digital control unit. Centronik provides integral control with data logging for diagnostics and asset management. The module is compatible with hardwired, digital or analogue control protocols and offers cost-effective integration with centralised and distributed control systems. Non-intrusive, password protected configuration is performed using the actuator selector switches or the hand-held Centork Setting Tool, using infra-red or Bluetooth® interfaces.
The Centronik display provides position indication, status and alarms plus user-friendly menu-driven configuration screens. CK actuators are manufactured in a range of sizes complying with international actuator design standards EN15714-2 and EN ISO 5210. Manual handwheel operation, designed to standard EN12570, is independent of the motor drive and selected with a lockable hand/auto lever acting on a safe, low speed clutch. All actuator sizes can utilise separate thrust or non-thrust bases, enabling actuators to be removed from the valve without affecting valve position.
The CK Range maximum multi-turn output torque is 6,800 Nm (5,030 lbf.ft), whilst part-turn torque up to 200,000 Nm (147,600 lbf.ft) is achieved in combination with secondary gearboxes. The torque range facilitates reliable operation of valve types and sizes typically found in industries such as power generation.
