Related Manuals for Woodward LQ25
Summary of Contents for Woodward LQ25
- Page 1 Product Manual 35029 (Revision B, 04/2024) Original Instructions LQ25 Valve Actuator Assembly with Dual Resolver and ID Module, SST Marine 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
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Contents ....................... 3 ARNINGS AND OTICES ..................4 LECTROSTATIC ISCHARGE WARENESS ......................5 EGULATORY OMPLIANCE 1. G ....................7 HAPTER ENERAL NFORMATION Introduction ..............................7 Valve Identity Module (ID Module) ........................ 7 Drivers ................................ - Page 4 Table 2-3. Optional SOV Connector MS3450-LS16S-1P Pin outs ............. 22 Table 2-4 Cable, Feedback 1 Resolver – Woodward P/N ................24 Table 2-5. Cable, Feedback 2 Resolver and ID Module – Woodward P/N ..........26 Table 2-6. Cable, Motor Power – Woodward P/N ..................28 Table 3-1.
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Page 5: Warnings And Notices
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module 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
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Electrostatic Discharge Awareness Electronic controls contain static-sensitive parts. Observe the following precautions to prevent damage to these parts: Discharge body static before handling the control (with power to •... -
Page 7: Regulatory Compliance
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Regulatory Compliance European Compliance for CE Marking: These listings are limited only to those units bearing the CE Marking EMC Directive Declared to Directive 2014/30/EU of the European Parliament and of the... -
Page 8: Special Conditions For Safe Use
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Special Conditions for Safe Use Wiring must be in accordance with North American Class I, Division 2, or European or other international Zone 2, Category 3 wiring methods as applicable, and in accordance with the authority having jurisdiction. -
Page 9: Chapter 1. General Information
Information on predicting fuel flow through the LQ25 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 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Positioner Control Architecture The DVP / valve system will take a position demand signal and provide the corresponding position of the valve. This Positioner controller supports an external flow control algorithm that provides an input to the DVP as either an analog or a digital demand signal.
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Page 11: Lq25 Valve Flow Accuracy
This procedure ensures excellent valve to valve flow repeatability. See Figures 1-1, 1-2, and 1-3 to predict the metered fuel flow through the LQ25 as a function of Demand Input and metering port size. Note: These curves represent the "nominal" flow based on statistical data. -
Page 12: Figure 1-1. Lq25 Flow Vs Demand (0.1 In² Port)
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module LQ25 - Flow versus Demand 0.1 Square Inch Port 8000 7000 6000 5000 4000 3000 2000 1000 Demand Signal (mA) Figure 1-1. LQ25 Flow vs Demand (0.1 in² port) Table 1-2. -
Page 13: Figure 1-2. Lq25 Flow Vs Demand (0.2 In² Port)
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module LQ25 - Flow versus Demand 0.2 Square Inch Port 18000 16000 14000 12000 10000 8000 6000 4000 2000 Demand Signal (mA) Figure 1-2. LQ25 Flow vs Demand (0.2 in² port) Table 1-3. -
Page 14: Lq25 Fuel Metering Valve
LQ25 Fuel Metering Valve The LQ25 valve is suitable for use on gas turbines in the 6000 kW to 42 000 kW output power range, depending on available fuel properties and conditions. There are three port sizes for the LQ25: The 65 mm²... - Page 15 The LQ25 uses a patented single-stage droop-compensated differential pressure regulator. This maintains the differential pressure across the metering port at approximately constant, and the only factor affecting the output flow is the port area. The nominal set point for the LQ25 differential pressure is 345 kPa (3.45 bar/50 psid).
- Page 16 LQ25 metering valve is at low flow (or closed). 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. For the LQ25, this may be up to 13 608 kg/h (30 000 lb/h).
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Page 17: Figure 1-4A. Lq25 Schematic With Piv And Sov
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 1-4a. LQ25 Schematic with PIV and SOV Figure 1-4b. LQ25 Schematic with PIV Woodward... -
Page 18: Chapter 2. Installation
The LQ25 must be lifted with a sling or eyebolt installed on the valve top. The sling must straddle the LQ25 center of gravity in order to remain secure. Recommend one strap be placed under the round electrical cover and a second between the mounting feet. -
Page 19: Figure 2-1A. Lq25 Outline Drawing
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 2-1a. LQ25 Outline Drawing Woodward... -
Page 20: Figure 2-1B. Lq25 Outline Drawing, Fuel Connections, Piv, Sov
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 2-1b. LQ25 Outline Drawing, Fuel Connections, PIV, SOV Woodward... -
Page 21: Figure 2-1C. Lq25 Outline Drawing, Fuel Connections, Piv Only
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 2-1c. LQ25 Outline Drawing, Fuel Connections, PIV Only Woodward... -
Page 22: Figure 2-2. Lq25 Outline Drawing, Mountingholes
69 kPa (0.69 bar/10 psig). Do not plug the overboard drain as this may cause fuel to enter the LQ25 actuator, resulting in a hazardous condition with the potential to case personal injury and/or damage to the actuator. -
Page 23: Lq25 Wiring
LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Leakage exceeding 20 cm³/min from the overboard drain line indicates a worn or damaged shaft seal in the LQ25 valve and should be investigated immediately. Special tooling is required to replace the shaft seal. - Page 24 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Make electrical connections between the valve and driver with cables built to the requirements of Figures from 2-5a to 2-5f (Figures show only examples of the cables). The optional SOV and feedback switch are wired directly to the turbine control system and have no connection to the DVP.
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Page 25: Figure 2-3A. Cable, Feedback 1 Resolver
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 2-3a. Cable, Feedback 1 Resolver Woodward... - Page 26 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Table 2-4 Cable, Feedback 1 Resolver – Woodward P/N Woodward...
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Page 27: Figure 2-3B. Cable, Feedback 2 Resolver, And Id Module
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 2-3b. Cable, Feedback 2 Resolver, and ID Module Woodward... - Page 28 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Table 2-5. Cable, Feedback 2 Resolver and ID Module – Woodward P/N Woodward...
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Page 29: Figure 2-3C. Cable, Motor Power
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 2-3c. Cable, Motor Power Woodward... - Page 30 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Table 2-6. Cable, Motor Power – Woodward P/N Woodward...
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Page 31: Chapter 3. Specifications
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Chapter 3. Specifications Table 3-1. LQ25 Valve Specifications Environmental Specifications Operating Temperature –28 to +85 °C (–18 to +185 °F) Storage Temperature –40 to +103 °C (–40 to +217 °F) Vibration US MIL-STD-810C, Procedure 1, Table 514.2-ii, Figure 514.2-2, Curve J... - Page 32 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Table 3-1. LQ25 Valve Specifications (cont’d.) Steady State Performance Characteristics Range of Maximum 0.1 in²: 1814 to 3629 kg/h (4000 to 8000 lb/h) Metered Flows 0.2 in²: 3629 to 7258 kg/h (8000 to 18 000 lb/h) 0.3 in²: 7258 to 11 794 kg/h (16 000 to 26 000 lb/h)
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Page 33: Chapter 4. Maintenance
When removed from the engine system, it is possible to drain all fuel, condensed water vapor, or other contaminants from the assembly without further disassembly. There are no field-replaceable parts on the LQ25. No maintenance is required. Woodward... -
Page 34: 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 35: Figure 5-1. Troubleshooting Flowchart
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Figure 5-1. Troubleshooting Flowchart Woodward... -
Page 36: Chapter 6. Product Support And Service Options
Packager at their factory. In some cases, the programming is password-protected by the OEM or packager, and they are the best source for product service and support. Warranty service for Woodward products shipped with an equipment system should also be handled through the OEM or Packager. -
Page 37: Returning Equipment For Repair
All repair work carries the standard Woodward service warranty (Woodward North American Terms and Conditions of Sale 5-09-0690) on replaced parts and labor. -
Page 38: 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 39: Technical Assistance
LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module 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 40: Revision History
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Revision History Changes in Revision B— • Revised ATEX and PED Directives; revised DNV-GL and LR certifications in Regulatory Compliance section Added Other International Compliance - IECEx in Regulatory Compliance section •... -
Page 41: Declarations
Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Declarations Woodward... - Page 42 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module Woodward...
- Page 43 Manual 35029 LQ25 Valve Actuator Assembly w/ Dual Resolver & ID Module THIS PAGE INTENTIONALLY LEFT BLANK Woodward...
- Page 44 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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