E2H90 Series
On/Off Rotary Actuator
The E2H90 Electro-Hydraulic Rotary Actuator is designed & engineered for ON/OFF applications.
Compact Self-Contained Electro-Hydraulic Rotary Actuator for On/Off Applications
Cowan E2H90 Series Self-Contained Electro-Hydraulic Rotary Valve Actuators are used for industrial process valves where highly reliable, controlled and Emergency Shut-down are required. They are used to automate rotary type valves such as: ball and butterfly valves.
For valve automation applications that require emergency shutoff valve automation, we recommend the E2H-ESD.
Features
- Torque up to 2,650,000 in-lbs
- On/Off Service
- Fail-Last, Fail-Close or Fail-Open
- Spring-Return configuration available
- Manual Override is Standard
- Dual Hydraulic Filtering System: allows ease of maintenance
Independent and Adjustable Open/Close Time
The system flow rate is designed to be 20L/min. For example, the measure ESD time of a size 09 electro-hydraulic actuator is less than three seconds.
By independently setting an open/close adjustment valve in the hydraulic control system, the length of time to operate the valve by the actuator can be strictly controlled.
For example it can close or open the valve in a natural gas pipeline quickly (less than 10s) to block it, or slowly close (more than 120s) the valve to avoid the water hammer effect in a production oil pipeline.
Specifications
Service | Isolation, on/off |
Design | Double or single acting |
Fail system | Hydraulic Accumulators or Springs |
Driven by | Accumulators, sized to 2 strokes |
Voltages | 200-240 Vac/1 Phase/3 Phase |
Control panel | Integral or remote |
Ambient temperature | (-40 to +70 C) |
Protection | IP65/IP68 |
Classification for hazardous areas | Explosion-proof rating: Ex d IIB/IIC T4 |
Communication | Digital (standard) |
HMI | Local, remote and ESD function can be configured |
Service | Duty cycle S5 (15 min continue service) |
Power consumption | Only when recharging accumulators |
Movement Lock | Complete after each operation |
Manual override | Manual hydraulic pump |
Speed | Speed control for Open and Close |
Mounting | Horizontal or vertical (ISO, MSS, Custom) |
Safety Integrity level | SIL 2 (HFT)=0 ; SIL 3 (HFT>=1) |
Valve Compatibility
Our Series E2H90 Self-Contained Electro-hydraulic Rotary Actuator is compatible with any process valve that requires rotary motion.
Learn More About: Valve Types
Design and Materials
Roll-over the red circle hotspots for more details:
Accumulator
Integrated Hydraulic Control System
Filter
Power & Drive Modules
Quarter turn stroke: -5° to 95° adjustable
The cylinder features dual seals to guarantee zero leakage
Symmetric and canted yokes are available to satisfy various valve torque profiles
Explosion Proof Electronic Control Panel
Comparison Table |  E2H-ESD |  E2H90 |
Actuator mechanical Design | Scotch Yoke | Scotch Yoke |
Failure system | Spring return, fully sealed in a compact canister. Welding's Certified to CSA 47.1 Division 2. Option for hydraulic return on preloads higher than 306,000 lbs.-in | Hydraulic accumulators system designed to 2 strokes. Option for spring is available |
Fail Function | Fail on Loss of power & ESD Signal | Fail on Loss of ESD Signal |
Operational ambient temperature rating | (-50C TO 40C) | (-40C TO 70C) |
Control Panel | Standard: Installed on the unit wired and tested | Standard: Installed on the unit wired and tested |
Interface | Standard-Power/Overload/Open/Closed & PST light indicators. Open/Close/push buttons | Standard LCD Screen, circuit printed board. Navigation buttons, Open/Close buttons. Local, Remote selector |
Communication | Standard: Discrete. Open/close/ESD/PST | Standard: Discrete. Open/close/ESD/PST |
Environmental Protection | NEMA 4X, IP66 | IP67 |
Hazardous Area classification and certifications | CSA or uL or cUL CI1,Div1&2,Gr C&D | Ex d IIC T6 |
Power Supply Voltage | 120VAC/60Hz/Single phase. Options available | 220VAC/50Hz/Single phase. Options available |
Manual Override | Standard: Manual Hydraulic pump | Standard: Manual Hydraulic pump |
Partial Stroke | Comes standard, set at a set position. Standard 20% open. Speed adjustable | Comes standard, set at a set position. Standard 20% open |
Fail safe time | Fast- Less than 15 secs for all models. Adjustable and padlock able | Standard : Fixed. Not adjustable. |
Stroke operation | Directly driven by the hydraulic pump. No down time, recharge not needed | Driven by the pressurized fluid in the accumulators. Accumulators sized to 2 strokes, after this accumulators must recharge |
Recharge time | Not required. Unit is always available to stroke the valve | Between 15 to 30 mins depending on the model |
Modular Design | Yes, Controls and hydraulics can be provided remotely mounted as a standard design if required | No |
Hydraulic Design | All Hydraulic components and sensors are integrated into a compact manifold block. The complete hydraulic system is Fully enclose and pad-lockable | All hydraulic valves are included in a enclosed cabinet, interconnection between components is all done with stainless steel tubbing and fittings. |
Mechanical travel stops | Mechanical travel stops +/- 5% and local position indicator | Mechanical travel stops +/- 5% and local position indicator |
SIL Certification | SIL 3 (Pending) | SIL 2 (HFT)=0 ; SIL 3 (HFT>=1) |
Lifting lugs | Yes | Yes |