The CENTORK electrical actuators are compact units that, thanks to its modular design, can be used to drive electrically any type of valve.
The actuator reliability is guaranteed by the three-phase squirrel cage motor designed by CENTORK for valve actuation.
The main features are:
• Low inertia and high torque, which guarantee tight closing and a safe opening.
• Tropicalized class F insulation (155℃ Max. Temp.).
• S2-15 min. intermittent type of service (or S4-25% for modulating. Duty.).
• Overheating protection by means of embedded thermostats.
• Correct function even with voltage and frequency drops.
• IP-67 environmental protection (IP-68 Optional).
Optionally, actuators can be supplied with single phase AC or direct current motors. (For details of motor performance, please refer to the corresponding technical data sheet.)
The new PTCS system (Planetary Torque Control System) based on planetary gears, sets these actuators a step ahead in valve actuation.
This new patented system increases considerably the mechanical efficiency, reducing noise level and volume/torque ratio, and controlling the applied torque with great accuracy.
 Manual Operation
All the CENTORK electrical actuators come with a manual operation handwheel which can actuators the valve in any situation.
The motor drive is always proritary so not to cause any risk to the user.
 Valve-actuator coupling
The CEDNTORK actuators can take on different types of coupling depending on the type of valve to be actuated. All the types and sized have been designed according to ISO 5210/5211 and DIN 3338 Standards.
 Environmental protection weatherproof protection:
IP67 degree of protection.
Centork actuators are standard IP67 according to EN60529 IP68 degree of protection.
Centork actuators are available with IP68 enclosure protection as an option. Centork IP68 conditions are defined for 6m. deep submersion for a maxiumem of 72 hours. During submersion up to 10 Open-Close cycles are allowed.
High quality Epoxy coating suitable for outdoor installation and slightly aggressive atmospheres.
P1 and P1+ protection.
Centork recommends this protection for aggressive atmospheres.
P1+id recommended for shipping industry.
Using a special marine coating this protection is recommended for extremely aggressive atmospheres
Other corrosion protections according to customers needs can be used. Consult centork.
|| 0℃... +120℃ (optional)
||-60℃... +60℃ (optional)
For the installation of electric of electric actuators in potentially hazardous or explosive areas, special protective measures are needed.
Centork multiturn actuators comply with EN standards and ATEX directive:
 Electrical connection
The CENTORK actuators electrical connection presents 3 options according to the customer’s application/specification:
The different EK terminal plans are available in the corresponding technical sheets. The threaded conduit entries available as standard are: 2*PG21 + 1 PG 16, even though other alternatives (NPT, metric) can be supplied. (2* M25*1,5 + 1* M20*1,5 or 2*3/4” NPT + 1 * 1/2” NPT)