CKDJH Series Class 1E Category K3 Quarter-Turn Electric Valve Actuator is a nuclear-grade dedicated drive device for nuclear power applications, suitable for 0-90° rotary valves such as ball valves and butterfly valves. It meets the requirements of Class 1E electrical safety and Category K3 safe shutdown, and has passed nuclear-grade seismic and radiation resistance qualification tests. The actuator can withstand 110×10³Gy γ-ray irradiation and operate stably under SL2 seismic load, with an IP68 protection grade. Adopting ISO5211 standard flange connection, it covers a torque range of 60–2500N·m and is available in on-off and regulating types. Widely applied in nuclear island, conventional island, safety auxiliary and process medium conveying systems of nuclear power plants, it provides a safe and stable nuclear-grade drive solution for the opening, closing and regulation of nuclear power valves.
| Quantity: | |
|---|---|
CKDJH Series
The CKDJH Series Class 1E Category K3 Quarter-Turn Electric Valve Actuator is a professional nuclear-grade dedicated drive device independently developed by Yangzhou Hengchun Electronics Co., Ltd., a leading China manufacturer of valve actuators. Exclusively engineered for nuclear power applications, this nuclear-grade electric valve actuator is tailored for 0-90° rotary valves including ball valves and butterfly valves, serving as the core drive component for nuclear power valve control. It fully complies with Class 1E electrical safety and Category K3 safe shutdown requirements for nuclear power facilities, and has passed strict nuclear-grade seismic and radiation resistance qualification tests. As a high-performance quarter-turn electric actuator, it integrates reliable load bearing, extreme environment adaptability and precise control, providing a safe and stable drive solution for the opening, closing and regulation of nuclear power valves in all core systems of nuclear power plants.
The most prominent advantage of the CKDJH Series is its excellent anti-irradiation and seismic performance, which can withstand 110×10³Gy γ-ray irradiation and operate stably under SL2 seismic load. Fully meeting the harsh environmental requirements of nuclear power plants.
With an IP68 protection grade, the actuator is resistant to dust and deep water immersion, adapting to the complex working conditions of nuclear power systems. It adopts the international ISO5211 standard flange connection, realizing universal matching with nuclear-grade valves and easy installation and replacement.
Covering a torque range of 60–2500N·m, the actuator can meet the drive needs of different specifications of nuclear power rotary valves. It is available in on-off and regulating types, supporting both simple switch control and precise medium flow regulation of valves.
It has obtained the certification for Class 1E electrical safety and Category K3 safe shutdown, and all performance indicators have passed the official nuclear-grade qualification tests, ensuring the safety and reliability of its operation in nuclear power systems.
Parameter Category | Specific Parameters |
Basic Specifications | Product Type: Quarter-turn nuclear-grade valve electric actuator Nuclear Grade Certification: Class 1E electrical safety rating, Category K3 seismic classification, Seismic Category Ⅰ certification Design Life: 40 years Protection Grade: IP6 |
Power and Transmission | Power Supply: 380V three-phase AC power supply Transmission Structure: Worm gear mechanical transmission Output Form: Torque output (thrust output achievable via conversion device) Applicable Valves: Nuclear power gate valves, globe valves and other linear valves |
Environmental and Working Condition Withstand Capacity | Seismic Resistance: Withstands SL2 safe shutdown seismic load Irradiation Resistance: Withstands 110×10⁴Gy γ-ray irradiation Operating Conditions: Stable operation under normal working conditions and emergency safe shutdown |
Core Protection and Material | Overload Protection: Disc spring assembly + torque control mechanism for intelligent overload protection Core Materials: ZL111 gearbox housing, 20CrMnTi worm, QA110-4-4 worm gear Processing Technology: Precision mechanical processing with strict inspection throughout the whole process |
Structure and Features | Design Feature: Modular architecture design Operation and Maintenance Advantages: Convenient and efficient installation and commissioning; easy disassembly, assembly and maintenance of components, reducing O&M costs and downtime Applicable Field: Nuclear power field (matching outside the containment vessel of nuclear reactor) |
Hengchun strictly abides by nuclear power industry quality standards and ISO international certification requirements for the production of the CKDJH Series. All products have undergone full-item nuclear-grade qualification tests, including seismic resistance, radiation resistance, high and low temperature resistance and long-term operation reliability tests. The whole manufacturing process implements closed-loop quality control, from raw material procurement to component processing, assembly and factory inspection, with multiple quality inspection nodes to ensure that each nuclear-grade quarter-turn electric valve actuator meets the strict operation requirements of nuclear power plants. The product also has a complete after-sales quality guarantee system, providing technical support and maintenance solutions for global nuclear power customers.
Adapted for linear valves such as gate valves and globe valves, the actuator drives valve opening and closing in the cooling, feedwater and drainage circuits of the nuclear island, and operates stably under SL2 seismic load to ensure continuous and reliable operation of the nuclear island auxiliary systems.
Applied to valve actuation of steam, feedwater and condensed water process pipelines, its IP68 protection grade and radiation resistance adapt to the complex working conditions of the conventional island, realizing precise control of medium delivery and supporting high-efficiency operation of the conventional island.
As the core drive component of emergency cooling and pressure relief systems, it quickly responds to valve control commands under emergency safe shutdown conditions to complete safe shutdown operations, safeguarding the safety of nuclear power equipment.
Used for valve actuation of water, steam and other nuclear-grade process medium conveying pipelines, it can operate stably for a long time in harsh nuclear power environments, ensuring smooth conveying of process media.
The CKDJH Series is a nuclear-grade dedicated drive device exclusively for nuclear power plants, and is widely applied in nuclear island, conventional island, nuclear safety auxiliary and process medium conveying systems of nuclear power plants around the world.
Yes, based on the actual valve specifications and working condition requirements of nuclear power customers, we can provide customized adjustment of torque range and operation modes, and also provide supporting technical solutions and installation guidance.
