Related Manuals for Woodward LQ50
Summary of Contents for Woodward LQ50
- Page 1 Released Product Manual 26739 (Revision C, 12/2023) Original Instructions LQ50 Valve Actuator Assembly Installation and Operation Manual...
- Page 2 Revisions— A bold, black line alongside the text identifies changes in this publication since the last revision. Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly undertaken.
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Page 3: Table Of Contents
..................... 7 HAPTER ENERAL NFORMATION Introduction..............................7 Valve Identity Module (ID Module) ........................ 7 DVP Driver ..............................7 LQ50 Valve Flow Accuracy ........................... 9 LQ50 Fuel Metering Valve .......................... 10 2. I ......................15 HAPTER NSTALLATION LQ50 Valve Unpacking ..........................15 LQ50 Wiring .............................. - Page 4 LQ50 Valve Actuator Assembly Illustrations and Tables Figure 1-1. LQ50 Flow vs Demand (0.6 in² port) ..................9 Figure 1-2. LQ50 Schematic with PIV and Optional SOV ................12 Figure 1-3. Operating Limitations with 30 000 pph Inlet Flow ..............13 Figure 1-4.
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Page 5: Warnings And Notices
Released Manual 26739 LQ50 Valve Actuator Assembly Warnings and Notices Important Definitions This is the safety alert symbol used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. -
Page 6: Electrostatic Discharge Awareness
Do not touch the components or conductors on a printed circuit board with your hands or with conductive devices. To prevent damage to electronic components caused by improper handling, read and observe the precautions in Woodward manual 82715 , Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules. -
Page 7: Regulatory Compliance
RoHS Directive: Restriction of Hazardous Substances 2011/65/EU: Woodward Turbomachinery Systems products are intended exclusively for sale and use only as a part of Large Scale Fixed Installations per the meaning of Art.2.4(e) of directive 2011/65/EU. This fulfills the requirements stated in Art.2.4(c) and as such the product is excluded from the scope of... -
Page 8: Special Conditions For Safe Use
Released Manual 26739 LQ50 Valve Actuator Assembly RISQUE D'EXPLOSION - Ne pas brancher ou debrancher lorsque le circuit est sous tension, a moins que le milieu soit libre de substances inflammables concentrees. La substitution de composants peut rendre ce matériel inacceptable pour les emplacements de Classe I, applications Division 2 ou Zone 2. -
Page 9: Chapter 1. General Information
Information on predicting fuel flow through the LQ50 valve as a function of command input signal can be obtained from the flow calibration data supplied with each valve and, for nominal flow data, from information given in the following section. - Page 10 Released Manual 26739 LQ50 Valve Actuator Assembly DVP/Valve Operating Modes The valve can be in four operational modes. • Running • Shutdown • Shutdown position • Shutdown system See DVP manual 26329 for configuration options. Running: In this mode the valve is operating normally and is in position control; a setpoint is defined based on demand from external sources.
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Page 11: Lq50 Valve Flow Accuracy
LQ50 Valve Flow Accuracy The metering flow accuracy of the LQ50 valve is ±5% of nominal flow point or ±0.1% of maximum rated flow, whichever is greater. The maximum rated flow is based on metering port size: the 387 mm² (0.6 in²) port is 20 865 kg/h (46 000 lb/h). -
Page 12: Lq50 Fuel Metering Valve
LQ50 Fuel Metering Valve The LQ50 valve is suitable for use on gas turbines in the 6 MW to 60 MW output power range, depending on available fuel properties and conditions. There is one port size for the LQ50; the 387 mm² (0.6 in²) port is rated for 20 865 kg/h (46 000 lb/h). - Page 13 P1 and P2 to remain regulated. When the LQ50 metering valve is at low flow (or closed), most of the flow from the fuel pump will need to be bypassed back to the tank through the P regulator. In the case of a pump connected to an electric motor, it may be that most of the pump flow capacity will need to be bypassed.
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Page 14: Figure 1-2. Lq50 Schematic With Piv And Optional Sov
If a separate shutoff valve is used it should be a 3-way bypass style shutoff so that the pump is not dead headed resulting in running on the pump pressure relief valve. An LQ50 without the shutoff option MUST have a separate liquid fuel shutoff valve in line with the LQ50 metering valve. The LQ50 base metering valve is not a failsafe valve—failure to provide a separate... -
Page 15: Figure 1-3. Operating Limitations With 30 000 Pph Inlet Flow
Released Manual 26739 LQ50 Valve Actuator Assembly Operating Envelope of the LQ50 Valve Figure 1-3. Operating Limitations with 30 000 pph Inlet Flow Operating Range Limitations for Full Metering Accuracy with 40,000 pph Inlet Flow 1800 1600 1400 40kpph inlet Pn limit Typical Dry Turbine Pn vs. -
Page 16: Figure 1-5. Operating Limitations With 50 000 Pph Inlet Flow
(Pn) are within the limits shown in the figures above. If a pressurizing valve is not included in the LQ50, then there is an additional restriction that the outlet pressure must always be 3103 kPa (31.0 bar / 450 psi) above the bypass pressure. The LQ50 supply flow must be maintained at least 1134 kg/h (2500 lb/h) above the maximum application metered flow requirement to avoid regulator saturation. -
Page 17: Chapter 2. Installation
LQ50 Lifting The LQ50 must be lifted with a sling or by using the ½-13 threaded lifting hole provided. The sling must straddle the LQ50 center of gravity in order to remain secure (see Figure 2-1). It is recommended that one strap be placed under the round electrical cover and a second between the mounting feet. -
Page 18: Figure 2-1A. Lq50 Outline Drawing With Connectors
Released Manual 26739 LQ50 Valve Actuator Assembly Figure 2-1a. LQ50 Outline Drawing with Connectors Woodward... -
Page 19: Figure 2-1B. Lq50 Outline Drawing With Connectors
Released Manual 26739 LQ50 Valve Actuator Assembly Figure 2-1b. LQ50 Outline Drawing with Connectors Woodward... - Page 20 Leakage exceeding 20 cm³/min from the overboard drain line indicates a worn or damaged shaft seal in the LQ50 valve and should be investigated immediately. Special tooling is required to replace the shaft seal. Contact Woodward for service.
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Page 21: Lq50 Wiring
Released Manual 26739 LQ50 Valve Actuator Assembly LQ50 Wiring For use in an ATEX Zone 2 environment, connect only resistive loads to the position switch (through the SOV connector) that meet the limits of Chapter 3: Detailed Specifications. The making/breaking of highly inductive or capacitive loads has not been evaluated and may impair the suitability of the device. -
Page 22: Figure 2-2A. Cable, Feedback 1 Resolver Signal
Released Manual 26739 LQ50 Valve Actuator Assembly Figure 2-2a. Cable, Feedback 1 Resolver Signal Woodward... -
Page 23: Figure 2-2B. Cable, Feedback 2 Resolver Signal And Id Module
Released Manual 26739 LQ50 Valve Actuator Assembly Figure 2-2b. Cable, Feedback 2 Resolver Signal and ID Module Woodward... -
Page 24: Figure 2-2C. Cable, Motor Power
Released Manual 26739 LQ50 Valve Actuator Assembly Figure 2-2c. Cable, Motor Power Woodward... -
Page 25: Installation And Application Pre-Start Checks
Refer to manual 26329 for DVP end connection. Installation and Application Pre-Start Checks Every LQ50 installation should include, as a minimum, the recommended checks outlined in Table 2-2 below. All prime mover OEM recommendations and all required plant safety checks must always be followed and supersede any recommended actions. - Page 26 Released Manual 26739 LQ50 Valve Actuator Assembly Table 2-4. Recommended System Checks Woodward...
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Page 27: Chapter 3. Detailed Specifications
Released Manual 26739 LQ50 Valve Actuator Assembly Chapter 3. Detailed Specifications LQ50 Valve Specifications Environmental Specifications Operating Temperature (–29 to +93) °C / (–20 to +200) °F Storage Temperature (–40 to +121) °C / (–40 to +250) °F US MIL-STD-810C, Procedure 1, Table 514.2-ii, Figure 514.2-2, Curve J 20–2000 Hz (5g) - Page 28 860 μm (0.86 mm) as measured by the HFRR test specified in ISO 12156-1. Other fuels such as ethanol or methanol may be acceptable with internal seal compound substitutions. Contact Woodward for these and other special fuel applications. Fluid Inlet Temperature Range (–29 to +93) °C / (–20 to +200) °F...
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Page 29: Chapter 4. Maintenance
Handle the valve accordingly by placing in a sealed bag before shipping. There are no field-replaceable parts on the LQ50. No field maintenance is required. Maintenance is to be performed only by Woodward qualified personnel. -
Page 30: Chapter 5. Troubleshooting
If after following these troubleshooting procedures you are unable to find the cause of a problem and repair it, contact Woodward for assistance. If the results of these procedures indicate that the valve may be faulty, replace the suspected unit with a valve known to be good to verify that the cause of the problem is in the valve. -
Page 31: Figure 5-1. Troubleshooting Flowchart
Released Manual 26739 LQ50 Valve Actuator Assembly Figure 5-1. Troubleshooting Flowchart Woodward... -
Page 32: Chapter 6. Product Support And Service Options
• An Authorized Independent Service Facility (AISF) provides authorized service that includes repairs, repair parts, and warranty service on Woodward's behalf. Service (not new unit sales) is an AISF's primary mission. A current list of Woodward Business Partners is available at: https://www.woodward.com/en/support/industrial/service-and-spare-parts/find-a-local-partner... -
Page 33: Returning Equipment For Repair
All repair work carries the standard Woodward service warranty (Woodward Product and Service Warranty 5-09-0690) on replaced parts and labor. -
Page 34: Replacement Parts
• The unit serial number, which is also on the nameplate Engineering Services Woodward offers various Engineering Services for our products. For these services, you can contact us by telephone, by email, or through the Woodward website. • Technical Support •... -
Page 35: Technical Assistance
LQ50 Valve Actuator Assembly Technical Assistance If you need to contact technical assistance, you will need to provide the following information. Please write it down here before contacting the Engine OEM, the Packager, a Woodward Business Partner, or the Woodward factory: General... -
Page 36: Revision History
Released Manual 26739 LQ50 Valve Actuator Assembly Revision History Changes in Revision C— • Removed CE line under Pressure Equipment Directive • Replaced new Declarations Changes in Revision B— • The following Directives/Certifications updated in the Regulatory Compliance section Pressure Equipment Directive... -
Page 37: Declarations
Released Manual 26739 LQ50 Valve Actuator Assembly Declarations Woodward... - Page 38 Released Manual 26739 LQ50 Valve Actuator Assembly Woodward...
- Page 39 Released Manual 26739 LQ50 Valve Actuator Assembly THIS PAGE INTENTIONALLY LEFT BLANK Woodward...
- Page 40 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.
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