Curtiss-Wright 2600 Series Maintenance Manual
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Curtiss-Wright 2600 Series Maintenance Manual

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0713T R0
Series 2600
Maintenance Manual

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Summary of Contents for Curtiss-Wright 2600 Series

  • Page 1 0713T R0 Series 2600 Maintenance Manual...

  • Page 2: Table Of Contents

    This maintenance manual is provided because you have Farris Engineering 2. Safety Warning and Instruction System ..........3-4 2600 Series pressure relief valves protecting equipment and personnel in 3. Serial and Type Numbering Sytems ........... 5-7 your plant. We trust that you will find this manual useful, as it is intended 4.

  • Page 3: Safety Warning And Instruction System

    The maintenance manual is provided by Farris Engineering, a business unit No repair, assembly, adjustment or testing performed by individuals other of Curtiss-Wright Flow Control Company, to its customers as general than Farris-authorized representatives shall be covered by the warranty guidance for the repair and maintenance of Farris valves described herein.
  • Page 4 All possible hazards may not be identified in this manual. Conduct Prior to valve disassembly, ensure that proper controls are implemented your own safety risk assessment given your specific system, to address potential exposures to hazardous substances, including environment, and configuration, and ensure proper control proce- gases, liquids, or process byproducts contained in or contaminating the dures are in place to prevent personal injury or illness and property, valve.

  • Page 5: Serial And Type Numbering Sytems

    See The following outline will give general guidelines on the serial numbering Figure 1.2 on page 6 for an example of a typical 2600 Series nameplate. system used on 2600 Series valves.
  • Page 6 Type Numbering System Our type numbering system simplifies the selection and specifying of Farris pressure relief valves because the digits that comprise a specific type number have a distinct significance. The digits describe the basic valve series, orifice, seat and internal construction, inlet temperature range, body, bonnet and spring material, inlet flange class and Code liquid design.
  • Page 7 Special Special Inlet Class Construction (if applicable) Inlet Facing Cap Construction Test Gag Material A Expanded API sizes: air, steam See “Materials Special Screwed Cap Without and gas service * for Corrosive ANSI Nominal Raised Face, ANSI Std. Service” Inlet Flange Class Bolted Cap B Expanded API sizes: ASME liquid valve * (125 to 160 AARH)

  • Page 8: Valve Cross-Section, Parts And Construction

    4. Valve Cross-Section, Parts and Construction Stem Spring Adjusting Screw Jam Nut (S.A.S.) Cap Gasket Spring Button Bonnet Spring Stem Retainer Sleeve Guide Lock Screw Bonnet Gasket Body Gasket Disc Disc Holder Lock Screw Gasket Lock Screw (B.D.R.) Hex Nut Lock Screw Stud Blow Down Ring Pipe Plug...
  • Page 9 Valve Bill of Materials Item Part Name Conventional (A10) Material BalanSeal (A11) Material 26( )( )10 thru 26( )( )16 SA-216 Gr. WCB, Carbon Steel SA-216 Gr. WCB, Carbon Steel Body 26( )( )32 thru 26( )( )36 SA-217 Gr. WC6, Chrome Moly SA-217 Gr.
  • Page 10 Figure 4.2 Figure 4.3 Internals for Orifice D-J Internals for Orifice K-P Figure 4.4 Figure 4.5 Internals for Orifice Q-U BalanSeal Bellows Safety Valve ®...

  • Page 11: Valve Removal And Pre-Inspection

    5. Valve Removal and Pre-Inspection General Handling: In practice, a repaired pressure relief valve including one that has been NOTICE NOTICE only cleaned or readjusted is called upon to provide the same degree of After the pressure relief protection as a new valve. It follows that maintenance personnel must be valve is removed from trained to a level of proficiency that enables them to restore a valve to the installation it should...
  • Page 12 Inspection of Inlet and Outlet Piping In-Shop Inspection When a pressure relief valve is removed from service, the upstream and When a valve is first received in the shop it should be given a visual downstream piping is often open and available for inspection. However, inspection to note its condition when removed from service.

  • Page 13: Disassembly Instructions

    DANGER After the valve is received and checked it is ready for shop inspection and Farris 2600 Series valves should be disassembled repair. The valve should be carefully dismantled. If you are unfamiliar with as described below. Parts identification may be this line of Farris valves carefully study the cross-sectional drawings in found in Figure 4.1 on page 8.
  • Page 14 4. Remove the Blow Down Ring Lock Screw assembly [12,13, 25] and Lock 8. Using the Stem [9] as a handle, lift the complete internal assembly Screw Gasket [24]. Record the position of the Blow Down Ring [7] with from the valve Body [1]. (Figure 6.4) respect to the Disc Holder [6] by counting the number of notches required to a.
  • Page 15 11. Remove the Disc [4] from the Disc Holder [6] (Figure 6.6). d. Allen key wrench sizes are shown in Table 6.1. a. Hold the assembly and rotate the Disc [4] with the tip of your finger. e. Be careful not to damage the guiding surface of the Stem Retainer [14] during disassembly.

  • Page 16: Cleaning And Inspection

    Inspection of valve components is important to OEM parts only! 2600 Series body, bonnet and cap castings can be sand or bead blasted. When ensure proper valve performance. Damaged blast cleaning, exercise caution to protect internal and machined surfaces to valve parts must be repaired or replaced avoid causing damage.

  • Page 17: Maintenance And Repair Procedures

    8. Maintenance and Repair Procedures Nozzle Refacing Lapping Compounds SAFETY INSTRUCTIONS 1. Prior to refacing the nozzle seating area, grip The three grades of Farris Lapping Compounds are prepared especially for the nozzle flange in a lathe chuck fitted with the requirements of pressure relief valves.
  • Page 18 General Operation 3. Lap the disc until all blemishes and score marks have been removed. As the figure eight motion is executed, frequently lift the disc away from This is a general procedure for the use of lapping machines. ALWAYS the block to get a fresh bite on the compound.

  • Page 19: Assembly Instructions

    Assembly Instructions Threaded parts should be lubricated to prevent galling, especially parts Farris 2600 Series valves should be assembled as described below. made of similar materials. In addition, guides and pivot points should Parts identification may be found in Figure 4.1 on page 8.
  • Page 20 9. Thread the Disc Holder [6] onto the Stem Retainer [14] using a 12. Thread the Stem [9] and Stem Retainer [14] together. Be sure this special assembly block (see Figure 9.3). Do not attempt to hold the connection is free-floating. (Figure 9.5) Stem Retainer [14] on the guiding surface.
  • Page 21 17. Place the upper Spring Button [17] on the Spring [20]. 18. Thread the Pipe Plug [27] into the Bonnet [2]. Skip this step for Bellows Construction. 19. Place the Bonnet [2] onto the Body [1], making sure to align the Pipe Plug [27] to the position indicated in disassembly notes.

  • Page 22: Setting, Testing And Adjustments

    10. Setting, Testing and Adjustments Equipment Procedure DANGER SAFETY INSTRUCTIONS Air testing is the usual method of testing and To properly test a valve, the test drum setting pressure relief valves; however, valves pressure is brought up to about 90% of the set should be set and tested using the approved pressure of the valve.
  • Page 23 Liquid Service API Standard 527 is a widely accepted standard for the procedure and acceptance criteria for assessing the seat tightness of pressure relief Liquid service valves must be set on water with set pressure indicated as valves. The user should be familiar with this standard, in addition to any the first steady stream of water perpendicular to the outlet of the valve.
  • Page 24 Steam Testing Air at ambient temperature shall be used as the pressure medium. The valve shall be observed for leakage for at least 1 minute. The leakage rate Steam service pressure relief valves which are set and adjusted on steam in bubbles per minutes shall not exceed the numbers listed in Table 10.1.
  • Page 25 Compensation for Temperature For both metal and O-Ring seated valves in liquid service, Farris’ standard acceptance criteria is no visible leakage at 90% of set pressure for valves Any increase in temperature causes a reduction in set pressure of a with a set pressure of 50 psig and higher.
  • Page 26 Operating Differentials Final Notes The variety of service conditions which a pressure relief valve is subjected Once your valve has been assembled and tested make sure that you have to precludes a rigid set of rules. Operating difficulties can be minimized by completed all necessary records before placing it back in service.

  • Page 27: Troubleshooting

    11. Troubleshooting Chatter Leakage The valve is oversized for installation. The seats are damaged. If the inlet capacity is less than 25% of the valve capacity there will be a Lap the seats to remove the damage. If the scratches are deep, machining tendency for the valve to chatter.

  • Page 28: Appendix A: Valve Terminology

    Appendix A: Valve Terminology Safety Valve - An automatic pressure relieving device actuated by the Maximum Allowable Working Pressure - Maximum allowable working static pressure upstream of the valve, and characterized by rapid full pressure is the maximum gauge pressure permissible at the top of a opening or pop action.

  • Page 29: Appendix B: Bellows Construction

    Appendix B: Bellows Construction Bellows require very thin materials to provide NOTICE the required flexibility. This results in a delicate assembly which should be carefully handled. Do not attempt to repair a bellows assembly. Any pitting or surface corrosion are sure signs of limited service life even though the bellows may be pressure tight.
  • Page 30 BalanSeal Bellows Construction ® For all other orifices (Refer to B.4 below): Assembly/Disassembly Instructions 1. Place the Bellows Gasket [16] on the Stem Retainer [14]. The following instructions are assembly instructions. For disassembly, 2. Place the Bellows [15] on the Stem Retainer [14]. reverse the order.

  • Page 31: Appendix C: O-Ring Construction

    Appendix C: O-Ring Construction Due to corrosion, metal-to-metal seats can eventually leak. With the proper The O-ring seat seal option is available for NOTICE selection of the Farris O-ring seat pressure seal, seat tightness can be 2600/2600L/2600S Series valves in both improved and maintained.
  • Page 32 O-Ring Seat Construction O-Ring Material Selection Table Assembly/Disassembly Instructions D to K Orifice L to T Orifice The following instructions are assembly instructions. For disassembly, Temperature Material Durometer Durometer Range °F reverse the order. Parts identification can be found on page 31. Follow the Pressure Pressure (Shore A)

  • Page 33: Appendix D: Cap Construction

    Plain Washer Test Lever Figure D.1 – Packed Lever Cap Construction 2600 Series, All Sizes Packed Lever Construction Assembly/Disassembly Instructions The following instructions are assembly instructions. For disassembly, reverse the order. Parts identification may be found above. Assembly procedures for the balance of valve is identical for all cap design options: plain cap, open lever, bolted cap and packed lever.
  • Page 34 Stem Test Nut Cotter Pin Lever RD. HD. Rivet Cap Screw Test Lever Figure D.2 – Open Lever (Single Acting) 2600 Series, Types 26( )A10, A11, A20, A21, All Sizes Except 8x10 Stem Jam Nut Stem Test Nut Cotter Pin Fork RD.
  • Page 35 Cap Constructions Standard Material & Material for Corrosive/Low Temperature Service - Stainless Steel Std. Materials Part Name S1, N1 -75°F to -450 °F to Description -20°F to 800°F 800°F 450°F Carbon Steel 316 St. 316 St. Test Lever Carbon Steel 316 St.

  • Page 36: Appendix E: Critical Dimensions

    Appendix E: Critical Dimensions These dimensions apply to 2600 Series valves with “A10” through “A15” serial numbers and supersede any dimensions provided in previous revisions to the manual. Table E.1: Metal Seats - Serial Number Suffixes: A10 & A11 / A14 & A15...
  • Page 37 Metal Seats A10, A11, A14, A15 Critical Dimensions Refer to Table E.1 Nozzle Disc (minimum length) (minimum thickness) Mirror Finish Mirror Mirror Finish Finish 45˚ 30˚ 30˚ 30˚ Nozzle Figure 1 Nozzle Figure 2 Nozzle Figure 3 .005 - .030 .005 - .030 Mirror Mirror...
  • Page 38 Table E.2: O-ring Seats - Serial Number Suffixes: A10 & A11 / A14 & A15 Nozzle Dimensions Type +.000 +.000 Figure -.005 -.002 0 - 3 4.141 26D( )( )z 0.520 0.615 0.078 0.01 4.375 0 - 3 4.081 26E( )( )z 0.585 0.800 –...
  • Page 39 O-ring Seats A10, A11, A14, A15 Critical Dimensions Refer to table E.2 Nozzle (minimum length) 15˚ 60˚ 60˚ 45˚ 45˚ Nozzle Figure 4 Nozzle Figure 5...
  • Page 40 Table E.3: O Ring Seats - Serial Number Suffixes: A10/M, A11/M, A14/M, A15/M, A10/R and A11/R Nozzle Dimensions Type +.000 +.003 +.000 +.003 -.003 -.000 -.003 -.000 0 - 3 4.145 4.145 26D( )( )z 0.520 0.564 0.520 0.560 4.390 4.390 0 - 3 4.081...
  • Page 41 O Ring Seats A10/M, A11/M, A14/M, A15/M, A10/R and A11/R Critical Dimensions Refer to table E.3 Nozzle (minimum length) 0.01 min 0.01 min 45˚ 0.025 min 60˚ 60˚ 45˚ 45˚ Nozzle Figure M Nozzle Figure R...
  • Page 42 Table E.4: Metal Seats - Serial Number Suffixes: A10 & A11 Interim Nozzle Dimensions Disc Dimensions Type Nozzle Disc +.010 +.000 +.005 +.005 +.000 +.005 Fig. min. Fig. -.000 -.005 -.000 -.005 -.005 -.000 26D( )( )0 0.437 0.520 0.580 0.005 –...
  • Page 43 Metal Seats A10, A11 Interim Critical Dimensions Refer to Table E.4 Nozzle Disc (minimum length) (minimum thickness) Mirror Mirror Finish Finish 30˚ 30˚ Nozzle Figure 1 Nozzle Figure 2 .015 - .030 .015 - .030 Mirror Mirror Finish Finish Disc Figure 1 Disc Figure 2...

  • Page 44: Appendix F: Maintenance & Inspection Specification Record

    Appendix F: Maintenance & Inspection Specification Record The information in the below form is typical of the data that should be as well as valves removed from service for maintenance. This form should recorded for all valves. This information should be compiled for new valves be photocopied and used as part of any repair shops’...

  • Page 45: Appendix G: Required Tools

    Appendix G: Required Tools Required Tools Orifice Open End Wrenches 7/16" • • • • • • • • • • • • • • 9/16" • • • • • • • • • • • • • • 3/4"...

  • Page 46: Appendix H: Torque Values

    Appendix H: Torque Requirements This appendix contains the minimum torquing requirements for body/ bonnet and bolted/packed cap for Farris pressure relief valves. Valve: Body/Bonnet - Bolted/Packed Cap Procedure (See figures to the right): 1. Valve studs, nuts and bolts shall be visually inspected to ensure they are free of rust, dirt, or physical damage.
  • Page 47 Notes...
  • Page 48 Offices Worldwide: For a listing of our global sales network, visit our website at http://farris.cwfc.com. While this information is presented in good faith and believed to be accurate, Farris Engineering, division of Curtiss-Wright Flow Control Corporation, does not guarantee satisfactory results from reliance on such information.

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