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Summary of Contents for Woodward GSOV25
- Page 1 Product Manual 40172 (Revision AD, 4/2017) Original Instructions GSOV25 Gas Shutoff Valve 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
........................22 EVISION ISTORY ..........................23 ECLARATIONS Illustrations and Tables Figure 1-1. Outline Drawing of Gas Shutoff Valve (GSOV25) ..............8 Figure 2-1. Solenoid Wiring Diagram ......................10 Figure 3-1. Energized—Valve Open ......................14 Figure 3-2. De-energized—Valve Closed ....................15 ... -
Page 4: Warnings And Notices
Manual 40172 GSOV25 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. DANGER - Indicates a hazardous situation, which if not avoided, will result in death or serious injury. -
Page 5: 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 6: Regulatory Compliance
Connect ground terminal to earth ground. The GSOV25 is certified to a Zone 1-Category 2 / Division 1 method of protection. Wiring methods must comply with the Zone 1-Category 2 / Division 1 methods of protection when installed in a Zone 2 / Division 2 classified atmosphere. - Page 7 Manual 40172 GSOV25 EXPLOSION HAZARD—Do not connect or disconnect while circuit is live unless area is known to be non-hazardous. Substitution of components may impair suitability for Class I, Division 1 or Zone 1. RISQUE D’EXPLOSION—Ne pas raccorder ni débrancher tant que l’installation est sous tension, sauf en cas...
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Page 8: Chapter 1. General Information
Routine inspection is necessary for the protection of the turbine and the turbine operators. The High Speed Gas Shutoff Valve (GSOV25) is designed to terminate the turbine fuel supply should the electronic fuel control or sequencer interrupt the permissive electrical signal. -
Page 9: Gsov25 Specifications
Manual 40172 GSOV25 GSOV25 Specifications Closing Time less than 85 ms @ 4136 kPa (600 psig) less than 100 ms @ 6200 kPa (900 psig) Opening Time less than 300 ms Minimum Allowed Actuation 1034 kPa (150 psig) Pressure Maximum Allowed Valve... -
Page 10: Figure 1-1. Outline Drawing Of Gas Shutoff Valve (Gsov25)
Manual 40172 GSOV25 Figure 1-1. Outline Drawing of Gas Shutoff Valve (GSOV25) Woodward... -
Page 11: Chapter 2. Installation
Installation Receiving The GSOV25 gas shutoff valve is tested with dry air and then packed in a foam-filled box for shipment. The unit may be stored for an extended period in the original container. EXPLOSION HAZARD—Do not connect or disconnect while circuit is live unless area is known to be non-hazardous. -
Page 12: Electrical Connections
Manual 40172 GSOV25 The 0.562 inch-18 (-06) port on the pilot section boss should be connected to a gas-collection header and vented to a non-hazardous area. During opening transients, flow can be expected from the -06 vent port. During steady-state operation (open or closed) flow from the vent port should not exceed 1000 cm³/min. -
Page 13: Maintenance
See the Maintenance section of this manual for more information on the proximity switch. Maintenance If properly maintained and operated within its design limits, the GSOV25 will operate up to 50 000 hours or 20 000 cycles before requiring repair or overhaul. The following maintenance checks should be completed at the prescribed intervals. - Page 14 24 V (dc) coil is 400 mA and 80 mA for the 125 V (dc) coil. The solenoid valve can be replaced in the field if necessary. Remove the solenoid from the GSOV25 by unscrewing the two 0.250-28 Allen head screws that hold the solenoid to the valve housing. Replace the three O-ring seals if necessary (Woodward part number 1355-101).
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Page 15: External Pilot Pressure Operation
Remove thread seal, washer, and jam nuts from the old switch and install them on the new switch. The Woodward part number for the thread seal is 1386-181. Apply a small amount of Loctite 242 (removable) to the new switch threads and thread into the valve body until in bottoms out against main piston. -
Page 16: Chapter 3 Principles Of Operation
Manual 40172 GSOV25 Chapter 3 Principles of Operation Introduction Figures 3-1 and 3-2 illustrate the operating principle of the GSOV25 gas shutoff valve. Valve Open Energize the solenoid with appropriate voltage [24 V (dc) or 125 V (dc)]. ... -
Page 17: Figure 3-2. De-Energized-Valve Closed
Manual 40172 GSOV25 Valve Closed De-energize the solenoid. The three-way solenoid connects the pressure on the control land of the second stage piston to the vent (2 >> 1). The spring under the second stage piston overcomes the pressure on the control land and drives the second stage piston to the opposite end of its bore, seating the second stage ball seat and sealing the P1 pressure from the primary stage piston control land (3). - Page 18 GSOV25 Failsafe Principle The GSOV25 gas shutoff valve consists of three stages of valving to operate. This design is necessary to ensure the high speed shutoff and maintain the low pressure drop/high flow rate valve. Each of the three stages is spring loaded with at least five times the force needed to ensure valve closure.
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Page 19: Figure 3-3. Gsov25 Delta P Vs Flow
Manual 40172 GSOV25 Figure 3-3. GSOV25 Delta P vs Flow Woodward... -
Page 20: Chapter 4. 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 Recognized Turbine Retrofitter (RTR) is an independent company that does both steam and gas turbine control retrofits and upgrades globally, and can provide the full line of Woodward systems and components for the retrofits and overhauls, long term service contracts, emergency repairs, etc. -
Page 21: Returning Equipment For Repair
All repair work carries the standard Woodward service warranty (Woodward Product and Service Warranty 5-01-1205) on replaced parts and labor. -
Page 22: 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 23: Technical Assistance
GSOV25 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 Your Name... -
Page 24: Revision History
Manual 40172 GSOV25 Revision History Changes in Revision AC— Added SIL2 Certification Updated PED Directive Updated Declarations Changes in Revision AB— Updated ATEX compliance information Updated Declarations Changes in Revision AA— Added note on how to re-position the conduit entry (page 6) Changes in Revision Y—... -
Page 25: Declarations
Manual 40172 GSOV25 Declarations Woodward... - Page 26 Manual 40172 GSOV25 Woodward...
- Page 27 Manual 40172 GSOV25 Woodward...
- Page 28 Manual 40172 GSOV25 Woodward...
- Page 29 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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