Electro-Hydraulic Actuators

Transcription

1 IEEE Qualified for Valve and Damper Applications Electro-Hydraulic Actuators

2 Electro-Hydraulic Actuators Enertech, formerly Paul-Munroe Hydraulics, is a business unit of Curtiss-Wright Flow Control Company. Since 1967, Enertech has specialized in the supply of hydraulic equipment to the commercial nuclear power industry. In 1978, we recognized the need for a compact, fast acting hydraulic actuator to meet the demanding requirements of safe plant shut down and post accident cycling for valve and damper applications, both inside and outside containment. For over 30 years, Enertech has supplied valve and damper actuators that are qualified to stringent IEEE Standards for harsh environment conditions. Design Enertech s second generation electro-hydraulic operator (EHO) is fully self-contained for linear and rotary applications. The integral gas accumulator provides motive force for fail safe positioning upon loss of the electric command signal. The electric motor and hydraulic pump are IEEE qualified for post design basis event cycling following restoration of Class 1 power. Enertech s advanced EHO technology is ideally suited for large gate valves such as main steam isolation valves where high thrust, fast closing time of five seconds and sustained isolation force are mandatory. They are also designed for small torque outputs, such as damper actuators found on control room ventilation and other critical HVAC applications. In addition, Enertech s modulating EHO is industry proven in severe service control valve throttling applications including, PWR main steam atmospheric relief and main feedwater regulation. EHO on an Atmospheric Steam Dump Valve EHOs may be specified with one common hydraulic power unit containing an electric motor, pump and reservoir for fail safe control of up to four valves or dampers. Remote, skid mounted accumulators are offered for additional post accident cycling from stored energy without Class 1 power. Replacement for Legacy Electro-Hydraulic Actuators Enertech provides EHOs that are form, fit and function replacements for obsolete units found in many Generation II nuclear plants. Enertech s gas over oil design eliminates complex air pilot control sub loops found in competitors older electro-hydraulic actuator designs. Commercially available sub-components assure uninterrupted aftermarket support for the life of your plant. Environmental Qualification and Quality Assurance Enertech EHOs are used in nuclear safety and non-safety related applications around the world. Enertech EHOs have been successfully tested and qualified to IEEE 382, Case IV for inside containment design basis radiation, pressure, and temperature for safe plant shut down use. Seismic, vibration, and chemical spray conditions have also been successfully met in accordance with IEEE 344 and 323 Standards. All EHOs are manufactured under Enertech s Quality Assurance Program which complies with 10CFR50 Appendix B and NQA-1. Other nuclear quality standards for non- ASME governed plants may be specified. EHO on a Main Steam Isolation Valve 1

3 Enertech Second Generation EHO Features and Benefits IEEE Qualified - inside and outside containment applications Compact Design - highest available thrust or torque output to weight/mass ratio Self Contained - safe plant shut down energy; no air or Class 1 power supply required Fast Acting Response - ANSI Class 900, 36 gate valve Design Basis Event closure in less than 5 seconds. Closing time is independent of plant process condition and pressure Less than 1% Modulation Error - precise control valve positioning Partial Stroke Option - periodic testing of valve operability Dual Lock, Anti-Drift Design - prevention of position hunting Two Speed, Anti-Slam Damping Option - mitigation of water hammer Hand Pump Over Ride - manual cycling Why Enertech EHOs for Isolation and Throttling Applications? Electro-Hydraulic Pneumatic Electric Motor Fast Acting (< 5 seconds) Fail Safe w/o Class 1 Power Integral, Post Accident Cycling No Air Supply Required No Bulky Spring Packs Required Highest Thrust/Torque to Weight Ratio Less than 1% Positioning Error 2

4 EHO Nuclear Applications Linear Modulating Linear Two Position (On/Off) Product Description: Self-contained, modulating operator for precise control of linear gate, globe and diaphragm throttling valves. Self-contained, two-position linear operator for fast opening and closing of critical isolation valve applications. Features and Benefits: QME-1 Compliant Less than 1% Modulation Error Self-contained, No Air or Class 1 Power Required for Safe Plant Shutdown Post Accident Cycling QME-1 Compliant Fast Acting (< 5 sec.) Self-contained, No Air or Class 1 Power Required for Safe Plant Shutdown 10% Exercise Mode Typical Nuclear Applications: Recirculation Flow Control Valves Main Feedwater Regulation Atmospheric Steam Dump Valves Main Steam Isolation Valves Main Feedwater Isolation Valves Main Steam Bypass Valves Safety Injection Valves Specifications: Thrust: 5,000 to 250,000 lbs. Stroke Length: up to 18 in. Speed: up to 10.0 in./sec. Control Signal: 4/20mA; 10-50mA; 1-5 Volts Safety Mode: Post Accident Cycling Thrust: 5,000 to 250,000 lbs. Stroke Length: up to 28 in. Speed: up to 10.0 in./sec. Safety Modes: Fail Open; Fail Closed; Fail in Place 3

5 Rotary Two Position (On/Off) or Modulating Self-contained, rotary operator for twoposition or modulating service. Fast opening and closing and precise control of quarter turn ball, butterfly and plug valves. Distributed Power Units Distributed control of multiple valves and dampers or for applications where equipment may be inaccessible. Self Contained Rotary HVAC Damper Compact, quarter turn, rotary operator for direct mounting to louver and butterfly dampers and small valves. QME-1 Compliant Fast Acting (< 5 sec.) Self-contained, No Air or Class 1 Power Required for Safe Plant Shutdown Two-Speed Damping Control of One to Four Valves or Dampers with One Hydraulic Power Unit Additional Gas Volume Capacity for Post Accident Cycling QME-1 Compliant Compact Design for Direct Damper Mounting Weighs Less than lbs. Self-contained, No Air or Class 1 Power Required Containment Isolation Valves Containment Purge Valves Recirculation Flow Control Valves Service Water Isolation Valves Feedwater Regulation Valves Recirculation Flow Control Valves Multiple Valves and Dampers Control Room Ventilation Dampers Tornado Dampers Containment Purge Dampers Torque: 2,000 to 300,000 in-lbs. Degree of Rotation: 0 to 180 Safety Modes: Fail Open; Fail Closed; Fail in Place Thrust: 100,000 to 400,000 lbs. Torque: 100,000 to 300,000 in-lbs. Safety Modes: Fail Open; Fail Closed; Fail in Place Torque: 100 to over 1,000 in-lbs. Degree of Rotation: 0 to 180 Response Time: < 10.0 sec. Safety Modes: Fail Open; Closed; Fail in Place 4

6 EHO Major Components Rotary Hydraulic Operator Linear Hydraulic Operator 1 Reservoir Stores hydraulic fluid and feeds the pump to maintain hydraulic pressure and ensures the operator is able to function when required. 4 Solenoid Operated Valves (SOV) Provides directional control of the cylinder by diverting the flow of the hydraulic fluid. SOVs are used for both modulating and two-position functionality. 2 Pressure Switches Monitors the pressure of the nitrogen for fail safe operation. They also maintain the accumulator pressure by turning the pump on or off at specified high or low pressure settings. 5 Hydraulic Pump Maintains pressure in the accumulator. The pump receives signals from pressure switches. 3 Hydraulic Cylinder Heavy duty, equal area design delivers consistent force when performing both linear or rotary operation. 6 Accumulator Provides stored energy for fail safe operation and post accident cycling. 5

7 Standard Specifications Type - Self-contained electro-hydraulic or gas-hydraulic operator Power Supply - 220VAC, 3ph, 60Hz; 460VAC, 3 ph, 60Hz; 480VAC, 3ph, 50Hz Control Signal (mod.) mA (250 ohms resistant) Output - Standard Sizes Linear - 2,000 lbs. to 250,000 lbs. (8.9-1,112 kn) Rotary - 2,000 in-lbs. to 300,000 in-lbs. (226-33,895 Nm) Stroke - Standard Sizes Linear - Up to 28.0 inches (711.2 mm) Rotary - Up to 180 Cycle Life - 5,000 (linear); 10,000 (rotary); full stroke Hysteresis - Less than 2% of input (modulating) Linearity - Less than 2% of total span (modulating) Stroking Speed - Adjustable from < 5.0 sec. to > 2.0 min. Failure Mode - User selectable on loss of signal (Fail close, fail open, fail in place) Environmental - IEEE ; IEEE ; IEEE Radiation - Total of 192 mega rads (100 mega rads normal/92 mega rads accident) Seismic - Seismic levels to 4.0g s OBE; 5.0g s safe shutdown Normal Conditions F (54.4 C), 100%RH Accident Cond F (202 C), 66.0psig (4.56bar), 100%RH Hydraulic Fluid - Fyrquel EHC Additional Services Condition Monitoring Enertech can provide a continuous monitoring solution to ensure uninterrupted operation and provide the earliest indication of trouble. Enertech s diagnostic system monitors the EHO s system pressure, temperature and motor cycling to identify issues and predict when maintenance is required, minimizing downtime. Integrated Performance Testing This system allows the user to perform the same factory acceptance test performed by Enertech including stroke, deadband, linearity, hysteresis, feedback position, and frequency response. These tests can be performed remotely, minimizing risk from inaccessible locations and radiation exposure to plant personnel. Pump Skid Integration Enertech provides complete ASME Section III pump skid design and fabrication services for modularized delivery of safetyrelated units. Enertech can manufacture in accordance with ASME Section III, 10 CFR 50 Appendix B, Part 21 and NQA-1 for N Stamping of skid components and NPT Stamping of frame and connecting pipe. This includes seismic qualification of skid assemblies for critical to safety applications such as Diesel Generator Lube Oil Conditioning and Supply System. 6

8 Electro-Hydraulic Valve and Damper Actuators First in Customer Service to the Global Nuclear Power Industry Enertech, a business unit of Curtiss-Wright Flow Control Company, is an engineering, manufacturing, distribution and service company committed to providing solutions to meet the unique requirements of the nuclear power industry. Enertech provides advanced valves, actuators, pumps, instrumentation, heat exchangers, fluid sealing products, snubbers, diagnostic and test equipment, qualification and dedication services, maintenance, repair, and engineering services to the nuclear power industry. Enertech, located in Southern California, is a member of the Nuclear Group of companies (EMD, Nova, Scientech, Target Rock, Trentec), continuously supporting the global Nuclear Power Industry for over 50 years. Enertech enertech@curtisswright.com 2950 Birch Street Brea, CA BR R1 - ET