CR Electro-Hydraulic Actuator
The CR part‑turn series is designed for actuating butterfly valves, ball valves and dampers.it features faster response, higher positioning accuracy and longer service life than electric ones.
Technical data
| Torque Range: | 0.1 kN·m–320 kN·m | Modulating Frequency: | 1,800 cycles/h |
| Basic Error: | ±0.05%, ±0.2%, ±1% | Dead Band: | 0.05%–5% |
| Ambient Temperature Range: | -40°C to +60°C |
Features & Benefits
Fail-safe operation and power-loss response
Upon main power failure, the product can drive the valve to perform a safety reset action as configured.
Multi-stage speed control
The product supports four different speed levels within one travel segment.
Fire detection and protection
By means of a fusible alloy element, the unit can detect fire conditions and rapidly drive the valve to safety reset in accordance with preset requirements.
Control accuracy of 0.2% and frequency response of 3 Hz
The modulating type offers 0.2% control accuracy; high precision modulating type achieves up to 0.01%.
Rapid on-off operation within 0.5 s
The practical fastest full open / full close time depends on valve size and required torque. Higher torque will result in longer minimum operating time.
Certifications
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IECEx
IEC global explosion-proof system with worldwide recognition;explosion-proof products meet Ex db IIC T4 Gb rating
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CE EMC (Directive 2014/30/EU) LVD (Directive 2014/35/EU) MD(Directive 2006/42/EU)
Mandatory EU market access, EMC compliant
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ATEX Directive (2014/34/EU)
Mandatory EU certification for explosive atmosphere equipment; explosion-proof products meet Ex db IIC T4 Gb rating
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EAC TR-CU （004/2011+012/2011+020/2011）
Mandatory explosion-proof certification for 5 EAEU states;explosion-proof products meet 1Ex db IIB T4 Gb X and 1Ex db IIC T4 Gb X ratings；Mandatory EMC certification；safety of low-voltage equipment。
Applications
Oil & Gas
Covering upstream exploitation, midstream long-distance transportation & storage, and downstream refining processes. Core functions include medium cut-off, flow regulation and emergency safety shutoff.
Metallurgy
Used in ironmaking, steelmaking, continuous casting, rolling and auxiliary utility systems. Core functions: high-temperature & high-pressure valve control, medium cut-off, flow regulation, safety isolation and emergency safety shutoff.
Chemical
Widely deployed in chemical plants, mainly for rapid valve cut-off, flow regulation and emergency safety shutoff.
Case Studies
China Petroleum Pipeline Bureau (Langfang)-Gela Oil Pipeline Automation Upgrade Project
Long-distance pipelines are often located in remote areas where cabling is difficult. Power is typically supplied by photovoltaic or wind energy systems, making CR low-voltage DC-driven electro-hydraulic actuators a suitable choice for such applications. Actuators used in pipeline service must meet fire and explosion protection requirements and provide rapid shutoff in emergency situations or upon loss of power.
