DINKONDA GLOBAL Power Plants Special ROTORK CKA Atronik Isolating Duty Series Isolation Switch Type Domestic Replacement Multi Turn Electric Actuator

DINKONDA GLOBAL Power Plants Special ROTORK CKA Atronik Isolating Duty Series Isolation Switch Type Domestic Replacement Multi Turn Electric Actuator

Product Overview

This domestically produced substitute actuator is specifically designed to benchmark the Rotork CKA Atronik isolation duty (isolation cut-off type CK series) and is positioned for * * safe isolation conditions * *. Unlike ordinary regulating actuators, it is designed for use with isolation valves and safety shut-off valves that only require reliable cut-off, long-term valve position maintenance, and low operating frequency. The mechanical interface, electrical wiring definition, and installation flange size of the entire machine are fully compatible with the original CKA, and support direct replacement of the original Rotork CKA isolation type actuator on site without the need to modify the valve bracket, valve stem structure, and control cabinet circuit. It is a supporting solution for the national production transformation of safety isolation circuits in power plants, oil and gas, and chemical industries.

The original CKA Atronik model is designed for isolation and cut-off conditions, and is not suitable for frequent adjustments; The domestically produced models continue this positioning, with localized optimization for the operating logic of "long-term static, regular action, and fault safe shutdown", strengthening mechanical locking, position maintenance, and anti misoperation capabilities.

Key points of structural design (special design for isolation conditions)

1. * * High rigidity mechanical locking mechanism**
Equipped with an independent mechanical locking component, the valve can be manually locked in the fully open/fully closed position. Even if the control circuit loses power or the signal is disturbed after locking, the output shaft will not shift, meeting the process safety requirements of "reliable isolation and prevention of false opening" of the isolation valve. This is the core structural difference from the ordinary regulating CK series.

2. * * Low loss transmission gear set**
Adopting heavy-duty alloy helical gear transmission, long-term static creep is minimal, and there will be no valve position drift when stopped in the fully open/fully closed position for a long time; The gear pair has undergone stabilization and aging treatment, making it suitable for use in isolation valve scenarios where it only opens and closes once every few months or even years, eliminating problems such as jamming and biting.

3. Atronik architecture homologous control logic, reconstruction of domestic main control board**
Compare the isolation control logic of the original Atronik control unit, prioritize the protection of position signals, limit feedback, and isolation status indication, and weaken the continuous adjustment function; The control board adopts domestic industrial grade components and retains dual independent valve position feedback contacts. The isolated position signal is independent of the main control circuit output, meeting the signal independence requirements of SIL safety circuit.

4. * * Hand electric safety clutch mechanism**
Automatic clutch structure, the handwheel does not move during electric operation; When the electrical system malfunctions or loses power, manual operation can be directly switched, and the mechanical lock can also be put into operation after manual operation is in place. The output torque of the handwheel is amplified, and the high torque isolation valve opens and closes effortlessly under non electric conditions.

5. * * Separate independent wiring chamber**
The wiring terminal compartment is completely isolated from the transmission cavity, and the cable sealing joint adopts a double sealing structure with IP67 standard protection; Optional explosion-proof Exd IIC T6 version, used for process isolation pipelines of flammable and explosive media.

Features
• CKA isolating duty actuators (Class A and B) with Atronik control module providing modest integral controls
• Atronik controls meet the standard requirements of site specification
• Digital electronic-based controls with microprocessor-driven, easily-defined functionality
• Simple control and indication configuration via on-board DIP switches
• Programmable relays and analogue feedback for complete system integration
• Integral local control selectors with mode and direction selection
• Simple, user-friendly display interface for clear status indication
• Clear LED display with configurable colours to suit site standards
• Double-sealed enclosure to IP68
• Fast and efficient maintenance due to plug and socket connections
• Torque measurement and independently adjustable torque limiting for both open and close control
• Analogue control for positioning applications
• Basic network bus connectivity
• Optional extra relays for additional remote indication
• Optional analogue proportional control input and output transmitter (4-20 mA)
• Optional local position indicator with mechanically adjustable position