Electric Fail-Safe Spring Return Actuators for Quarter Turn Valves and Dampers
For over 35 years Flow-Quip has been known as a leader in valve automation products. Utilizing only the highest standards for quality control, in compliance with ISO 9001:2000 Flow-Quip offers the SR Series, an innovative line of valve actuator products to meet the stringent demands of pipelines and industries around the world.
Flow-Quip SR Series "Spring Return" Electric Actuators provide high integrity fail-safe stroking of valves and dampers. They are suitable for shop or field mounting on a wide range of ball, plug and butterfly valves. Open/Close and modulating control configurations are available in the SR Series.
Each SR Series actuator contains a compact electro-hydraulic power supply that provides hydraulic pressure for the powerful scotch-yoke spring return torque mechanism. This self contained design greatly reduces installation time since no field hydraulic tubing runs are needed. Each actuator can be controlled by monitoring primary electrical power and/or electrical control signal(s). When commanded, the powerful spring cartridge drives the actuator to its fail-safe position.
Hydraulic power means the SR Series provides accurate valve speed control and if needed, precise positioning capability for modulating service.
The actuator may be powered by a wide range of electrical supplies from either AC (single or 3 phase), or DC sources. Only rugged industrial service motors with internal thermal overload protection are utilized. All motor leads are terminated in a separate sealed terminal housing and clearly marked for field connection.
Standard Features:
- Fail to Open, close or fail last position (specify with order)
- Self Contained System (reduced installation cost)
- AC or DC Motor Power
- Mount in any position (specify at time of ordering)
- Scotch Yoke high breakaway torque output
- High Visibility Mechanical Position Indicator
- Watertight or Explosion-proof Construction
- Integral Motor Controls and Terminal Housing
- Easy to Adjust Valve Travel Stops
- Remote Position Indication Limit Switches
- Lockable Stainless Steel Hydraulic Power Module Enclosure
- Sealed Hydraulic Reservoir
- High Integrity Stainless Steel Tubing and Fittings
- Easy to Mount on New or Existing Valves or Dampers
- Torque Outputs up to 400,000 lb-in (45,000 Nm) spring ending torque
Optional Features:
- Local Electrical Controls
- Manual Reset after operation
- Alarm for low pressure
- Alarm for low level
- Manual Override
- Modulating Control (4-20 ma signal)
- Digital communication with Profibus, Modbus or Foundation Fieldbus
- Additional Auxiliary Limit Switches
- Corrosion Resistant Paint and Trim
- Electrical Power Disconnect
- Open and Close Adjustable Speed Control
- Solar Powered (for remote locations)
- Partial Stroke Testing Controls
- Position Transmitter (4-20 ma output)
- High Temperature Fire Sensor(s)
Solar Power – For Remote Locations
For pipeline locations in remote areas where electrical power is unavailable or unreliable, the SR Series Solar Power option is a logical choice. After analyzing the site location and topography Flow-Quip will utilize low current draw components to provide a complete site valve automation package including solar collectors, power regulators, battery storage unit and valve actuator. If needed DC power for site mounted SCADA equipment may also be furnished from the solar power supply.SR Series Rotary Spring Return Actuator: General Specifications
| Motor Voltages: | 120-220/1/60 220/1/50 220-440/3/60 24 VDC Other Voltages Available on request |
| Electrical Rating: | Nema 7 – Explosion-proof, Class I, Div. 1 or 2, Groups C and D Nema 4, Watertight Other electrical ratings are available when specified at the time of order placement. |
| Temperature: | Standard actuators are suitable for -10°F to +140° F (-23° C to +60° C) |
| Control Signal: | 120 VAC, 24 VDC or on loss of Motor Power, fail open, fail closed or fail in place controls are available. |
| Motor HP: | 0.5 to 5.0 HP Varies with torque and Stroking Speed – See model no. chart for details. |
| Auxillary Limit Switches: | 2 SPDT limit switches are standard, rated 15 amps/ 125VAC, 6 amps/ 24VDC Two additional switches are available as an option. All switches may be set at any point of travel. |
| Rotation: | 90 degrees +/- 5 degrees (adjustable) |
| Options: | Manual Reset, Local/ Off / Remote Selector, Modulating Control, Manual Override, Solar Power Supply, Motor Power Disconnect, Partial Stroke Testing |
| Torque Output: | 4,000 lb. in to 400,000 lb. in. ( 50,000 Nm) Spring Return other fail-safe actuators available up to 2,000,000 lb. in. (250,000 Nm) |
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