Woodward SS-260 Product Manual
  1. Manuals
  2. Brands
  3. Woodward Manuals
  4. Control Unit
  5. SS-260
  6. Product manual
Woodward SS-260 Product Manual

Woodward SS-260 Product Manual

8-inch gas stop/ratio valve
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Released
Product Manual 26276
(Revision AA, 10/2022)
Original Instructions
8-inch SS-260
Gas Stop/Ratio Valve
Installation and Operation Manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SS-260 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Woodward SS-260

Summary of Contents for Woodward SS-260

  • Page 1 Released Product Manual 26276 (Revision AA, 10/2022) Original Instructions 8-inch SS-260 Gas Stop/Ratio Valve Installation and Operation Manual...

  • Page 2: General Precautions

    Revisions—Changes in this publication since the last revision are indicated by a black line alongside the text. 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.

  • Page 3: Table Of Contents

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Contents ....................... 3  ARNINGS AND OTICES ..................4  LECTROSTATIC ISCHARGE WARENESS ......................5  EGULATORY OMPLIANCE 1. G ....................8  HAPTER ENERAL NFORMATION 2. S ................22  HAPTER ATIO ALVE PERATION 3. S ................
  • Page 4 Figure 1-1d. 8-inch SS-260 Gas Stop/Ratio Valve Outline Drawing............13   Figure 1-2a. 8-inch SS-260 Gas Stop/Ratio Valve with SST Junction Box Outline Drawing ..... 15   Figure 1-2b. 8-inch SS-260 Gas Stop/Ratio Valve with SST Junction Box Outline Drawing ..... 16  ...

  • Page 5: Warnings And Notices

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve 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

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve 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 Council of 26 February 2014 on the harmonization of the laws of the Member States relating to electromagnetic compatibility (EMC).
  • Page 8 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Other International Compliance: IECEx: Suitability for use in IECEx explosive atmospheres is the result of compliance of individual components: Junction Box: Certified Ex e II, IIC T6, T5, T4 per IECEx PTB 08.0006 Servo Valve: Certified Ex nA IIC T4, T3 Gc per IECEx KEM 10.0041X...
  • Page 9 Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve SIL Compliance: SIL certification is available for specific Woodward item numbers. Please contact a Woodward representative for assistance. Gas Stop/Ratio Valve – Certified SIL 3 Capable for safe position fuel shutoff function in safety instrumented systems. Evaluated to IEC 61508 Parts 1-7.

  • Page 10: Chapter 1. General Information

    Chapter 1. General Information The Woodward Gas Stop/Ratio Valve (Figure 1-1) performs a dual function for industrial or utility gas turbines. One function rapidly shuts off fuel to the turbine fuel control system. Another function provides accurate control of gas fuel pressure at the outlet of the stop/ratio valve. This pressure is applied to the inlets of the gas fuel control valve.
  • Page 11 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Table 1-2. Gas Stop/Ratio Valve Functional Characteristics Functional Requirement Gas Stop/Ratio Valve ® Valve Type Fisher Type 8” SS-260 Vee-Ball Process Fluid Natural gas and syngas Temperature Range Natural gas 50 to 550 °F (10 to 288 °C) (heated fuel) Position Accuracy ±1% full scale (over ±25 °F/±14 °C deviation from calibration)

  • Page 12: Figure 1-1A. 8-Inch Ss-260 Gas Stop/Ratio Valve Outline Drawing

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-1a. 8-inch SS-260 Gas Stop/Ratio Valve Outline Drawing (shown with high pressure trip valve) Woodward...

  • Page 13: Figure 1-1B. 8-Inch Ss-260 Gas Stop/Ratio Valve Outline Drawing

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-1b. 8-inch SS-260 Gas Stop/Ratio Valve Outline Drawing (shown with high pressure trip valve) Woodward...

  • Page 14: Figure 1-1C. 8-Inch Ss-260 Gas Stop/Ratio Valve Outline Drawing

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-1c. 8-inch SS-260 Gas Stop/Ratio Valve Outline Drawing (shown with low pressure trip valve) Woodward...

  • Page 15: Figure 1-1D. 8-Inch Ss-260 Gas Stop/Ratio Valve Outline Drawing

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-1d. 8-inch SS-260 Gas Stop/Ratio Valve Outline Drawing (shown with low pressure trip valve) Woodward...
  • Page 16 Note: See elsewhere in this manual for other installation recommendations Replacement Parts Servo valve—contact Woodward for the correct part number O-rings for servo valve—Woodward part number 1355-115 (4x) and 1355-107 (1x) Filter element—Woodward part number 1326-8002 LVDT—Woodward part number 1886-7009 Trip relay valve—Woodward part number 1309-045...

  • Page 17: Figure 1-2A. 8-Inch Ss-260 Gas Stop/Ratio Valve With Sst Junction Box Outline Drawing

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-2a. 8-inch SS-260 Gas Stop/Ratio Valve with SST Junction Box Outline Drawing Woodward...

  • Page 18: Figure 1-2B. 8-Inch Ss-260 Gas Stop/Ratio Valve With Sst Junction Box Outline Drawing

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-2b. 8-inch SS-260 Gas Stop/Ratio Valve with SST Junction Box Outline Drawing Woodward...

  • Page 19: Figure 1-3. 8-Inch Ss-260 Gas Stop/Ratio Valve Hydraulic Schematic

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-3. 8-inch SS-260 Gas Stop/Ratio Valve Hydraulic Schematic Woodward...

  • Page 20: Figure 1-4A. 8-Inch Ss-260 Gas Stop/Ratio Valve Electrical Schematic And Wiring Diagram

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-4a. 8-inch SS-260 Gas Stop/Ratio Valve Electrical Schematic and Wiring Diagram Woodward...

  • Page 21: Figure 1-4B. 8-Inch Ss-260 Gas Stop/Ratio Valve Electrical Schematic And Wiring Diagram

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-4b. 8-inch SS-260 Gas Stop/Ratio Valve Electrical Schematic and Wiring Diagram Woodward...

  • Page 22: Figure 1-5A. Lvdt Barrier Wiring Diagram (Tiis Requirement, Japan)

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-5a. LVDT Barrier Wiring Diagram (TIIS requirement, Japan) (This figure applies to TIIS requirement for Japan only) Woodward...

  • Page 23: Figure 1-5B. Servo Valve Barrier Wiring Diagram (Tiis Requirement, Japan)

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 1-5b. Servo Valve Barrier Wiring Diagram (TIIS requirement, Japan) (This figure applies to TIIS requirement for Japan only) Woodward...

  • Page 24: Chapter 2. Stop/Ratio Valve Operation

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Chapter 2. Stop/Ratio Valve Operation The Gas Stop/Ratio Valve actuator is controlled by an electronic servo-control system (not included), which compares the commanded and actual valve positions. The control system modulates the input current signal to the electrohydraulic servo valve to minimize the positioning system error.

  • Page 25: Chapter 3. Standard Component Details

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Chapter 3. Standard Component Details Triple Coil Electrohydraulic Servo Valve Assembly The stop/ratio valve actuator utilizes a two stage hydraulic servo valve to modulate the position of the output shaft and thereby control the stop ratio valve. The first stage torque motor utilizes a triple wound coil, which controls the position of the first and second stage valves in proportion to the total electrical current applied to the three coils.

  • Page 26: Hydraulic Filter Assembly

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve High Pressure Trip Valve When the externally supplied trip pressure is greater than 750 ±100 psid (5171 ±690 kPa), relative to drain pressure, the PTO logic valves allow servo valve pressure to reach the top of the hydraulic piston and the PTC valve prevents loss of this pressure to drain.

  • Page 27: Chapter 4. Installation

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Chapter 4. Installation General See Chapter 1 and Figure 1-2 (outline drawing) for:  Overall dimensions  Process piping flange locations  Hydraulic fitting sizes  Electrical connections  Lift points and center of gravity ...

  • Page 28: Unpacking

    The stop/ratio valve, with its integral strut supports, must be supported only by the pipe flanges. Additional supports are neither needed nor recommended. The SS-260 stop/ratio valve is equipped with an integral strut support system to minimize possible overstressing of the Fisher SS-260 valve neck during shipping and handling, as well as during operation.

  • Page 29: Figure 4-1A. Close-Up Of Strut Brackets On Pipe Flanges (Flanged Version)

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Preparing the stop/ratio valve for installation requires the following procedure: Suspend the stop/ratio valve assembly from the lifting hooks at its top. Loosen the four ¾-16 strut attaching bolts. Do not rest the weight of the stop/ratio valve assembly on the Fisher valve once the strut supports system bolts are loosened.

  • Page 30: Figure 4-1B. Close-Up Of Strut Brackets On Pipe Flanges (Flangeless Version)

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 4-1b. Close-up of Strut Brackets on Pipe Flanges (Flangeless Version) For the flangeless version, the threaded stud length and diameter for Class 600 flanges must conform to the following table according to the valve flange size.

  • Page 31: Hydraulic Connections

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Hydraulic Connections There are three hydraulic connections that must be made to each valve: supply, return, and trip oil. The connections to the valve are straight-thread O-ring style ports per SAE J514. The tubing up to the valve must be constructed to eliminate any transfer of vibration or other forces into the valve.

  • Page 32: Fuel Vent Port

    Fuel Vent Port The fuel vent port, located on the SS-260 valve shaft packing assembly, must be vented to a safe location. In normal operation, this vent should have zero leakage. However, if excessive leakage is detected from this vent port, contact a Woodward representative for assistance.
  • Page 33 Every valve shipped contains documentation that gives the actual Null Current as measured by Woodward. It is imperative that the control system null current match the as-measured current for each valve in the system. Incorrect null current setting, with proportional control only, will result in position error.

  • Page 34: Chapter 5. Maintenance And Hardware Replacement

    The Gas Stop/Ratio Valve requires no maintenance or adjustment in preparation for or during normal operation. Woodward recommends routine checks of the DP gauge on the filter assembly to verify that the filter is not partially clogged. If the DP indicator shows red, the filter element needs to be replaced.

  • Page 35: Figure 5-1. Safety Block

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Safety Block (Example, Woodward part number 3621-1091) This part is used to mechanically block the actuator so that it cannot move during service. Use care and follow all instructions after removal of the spring access cover.
  • Page 36 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Hydraulic Filter Assembly/Cartridge The hydraulic filter is located on the hydraulic manifold, hanging directly under the servo valve. Replacement of Filter Assembly 1. Remove four 0.312-18 UNC socket head cap screws. 2. Remove the filter assembly from manifold block.
  • Page 37 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Entrapped air may defeat the hydraulic cushion action of the actuator, resulting in excessive impact forces during a “trip” command. So, during the initial start-up and prior to operation following service of the actuator, oil filter, or hydraulic supply line, the following procedure must be completed before the unit is commanded to “trip”.
  • Page 38 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve 11. Place the servo valve onto the adapter plate that has been positioned on the hydraulic manifold. Be sure to orient the servo valve to match the original orientation. Be sure that all four O-rings remain in their proper location during assembly.
  • Page 39 6. Confirm that the LVDT output remains 0.7 ±0.1 Vrms. Readjust if required. 7. Install the stroke measurement attachment bar (Woodward part number 3780-1034 provided with the stop/ratio actuator) to the moving plate of the actuator as shown in Figure 5-2.

  • Page 40: Figure 5-2. Stroke Measurement Attachment Bar

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Figure 5-2. Stroke Measurement Attachment Bar Separating the Stop/Ratio Actuator & Transfer Case Assembly from the Fisher Gas Valve To prevent possible personal injury, do NOT remove the spring cover (which is spring-loaded to over 4000 lb/17 760 N). The four 0.750-16 UNF spring cover attaching nuts have metal tab locks and should not be disturbed.

  • Page 41: Figure 5-3. Alignment Of Index Marks

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Joining the Actuator/Transfer Case Assembly to the Gas Valve 1. Remove the linkage access cover and end plate from the actuator transfer case. 2. Remove the lower rod end and its jam nut from the actuator pushrod.
  • Page 42 20. Adjust the turnbuckle as required to achieve a final rigging of the valve per the Fisher SS_260 Vee- ball instruction manual (Form 5290; SS-260 errata sheet, Oct 2004 or later). The final position of the valve must be approached in the valve closing direction, whereby the turnbuckle is being shortened (pushrod in tension), replicating actuator motion.
  • Page 43 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Entrapped air may defeat the hydraulic cushion action of the actuator, resulting in excessive impact forces during a “trip” command. So, during the initial start-up and prior to operation following service of the actuator, oil filter, or hydraulic supply line, the following procedure must be completed before the unit is commanded to “trip”.
  • Page 44 20. Adjust the turnbuckle as required to achieve a final rigging of the valve per the Fisher SS_260 Vee- ball Instruction Manual (Form 5290; SS-260 errata sheet, Oct 2004 or later). The final position of the valve must be approached in the valve closing direction, whereby the turnbuckle is being shortened (pushrod in tension), replicating actuator motion.
  • Page 45 Execution of this procedure requires that the Fisher Vee-Ball be removed from the pipeline. 1. The SS-260 valve orientation (RH) shown on the outline drawing (Figure 1-2) is Woodward’s standard orientation (Fisher Style B, position 1). The following procedure is given to facilitate installation where the standard orientation cannot be accommodated.

  • Page 46: Troubleshooting Charts

    Under unusual circumstances where disassembly becomes necessary, all work and adjustments should be made by personnel thoroughly trained in the proper procedures. When requesting information or service help from Woodward, it is important to include the part number and serial number of the valve assembly in your communication.
  • Page 47 Excessive friction in Service Vee-Ball per Fisher manual Form 5290, Type Vee-Ball, Vee-Ball assembly and Fisher Errata Sheet Type Vee-Ball SS-260. Rod-end(s) worn out Return actuator to Woodward for service. Piston seal worn out Return actuator to Woodward for service.

  • Page 48: Chapter 6. Safety Management - Safe Position Fuel Shutoff Function

    IEC 61508, Parts 1 through 7. Reference the exida FMEDA report: WOO 19/05-012 R002, and Certification: WOO 1905012 C001. The exida FMEDA report is available on a per request basis from Woodward. The functional safety requirements in this chapter apply to all Gas Stop/Ratio Valve configurations listed in Table 6-1.

  • Page 49: Response Time Data

    No modification shall be made to the Gas Stop/Ratio Valve unless directed by Woodward. This functional check should include as much of the safety system as possible, such as sensors, transmitters, actuators, and trip blocks. The results of any functional check shall be recorded for future review.

  • Page 50: Operation And Maintenance Practice

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Operation and Maintenance Practice A periodic proof (functional) test of the Gas Stop/Ratio Valve is required to verify that any dangerous faults not detected by safety controller internal run-time diagnostics are detected. More information is in the “Proof Test”...

  • Page 51: Proof Test Coverage

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Proof Test Coverage The Proof Test Coverage for the Gas Stop/Ratio Valve is given in the table below. Table 6-3. Proof Test Coverage Proof Test Coverage Device λDUPT5F (FIT) No PVST with PVST...

  • Page 52: Acronyms

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Acronyms Equipment Under Control FMEDA Failure Modes, Effects and Diagnostic Analysis Hardware Fault Tolerance Management of Change. These are specific procedures to follow for any work activities in compliance with government regulatory authorities or requirements of a standard...

  • Page 53: Chapter 7. 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 Engine Retrofitter (RER) is an independent company that does retrofits and...

  • Page 54: 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 55: Replacement Parts

    Part number(s) (XXXX-XXXX) that is on the enclosure nameplate  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 56: Technical Assistance

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Technical Assistance If you need to telephone for technical assistance, you will need to provide the following information. Please write it down here before phoning: Your Name Site Location Phone Number Fax Number...

  • Page 57: Revision History

    Removed cutaway drawing (former Figure 1-1)  Removed Table 1-3 “Material List for Figure 1-1”  Added new drawings 8" SS-260 Gas Stop/Ratio Valve with SST Junction Box which are Figures 1-2a and 1-2b Changes in Revision V—  Added IECEx certification information to Regulatory Compliance section Changes in Revision U—...

  • Page 58: Declarations

    Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Declarations Woodward...
  • Page 59 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Woodward...
  • Page 60 Released Manual 26276 8-inch SS-260 Gas Stop/Ratio Valve Woodward...
  • Page 61 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.

Table of Contents