Curtiss-Wright 2600 Series Maintenance Manual Download

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General Notes:

The safety valve cross-section illustrated is typical and actual construction details will vary depending on valve size and pressure rating.

Consult the other illustrations contained elsewhere in this manual for greater detail or consult the factory for a cross-section drawing for the actual valve size and pressure rating.

Figure 4.1

4. Valve Cross-Section, Parts and Construction

Cap

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

Body

Nozzle

Summary of Contents for 2600 Series

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

Page 2: ...d safe operation installation testing maintenance adjustment and repair of Farris valves these activities shall only be performed by qualified personnel having the required skills and training No repair assembly adjustment or testing performed by individuals other than Farris authorized representatives shall be covered by the warranty extended by Farris to its customers All applicable regulations ...

Page 3: ... maintenance adjustment and repair of Farris valves these activities shall only be performed by qualified personnel having the required skills and training DANGER Indicates hazards which if not avoided will result in death or serious injury WARNING Indicates hazards which if not avoided could result in death or serious injury CAUTION Indicates hazards which if not avoided could result in minor or ...

Page 4: ...uld exhaust should be vented to a safe location to eliminate the potential for serious injury or damage during relief operation Prior to valve disassembly ensure that proper controls are implemented to address potential exposures to hazardous substances including gases liquids or process byproducts contained in or contaminating the valve Consult applicable material safety data sheets MSDSs and est...

Page 5: ...00L BalanSeal Piston Design All design variations and Services 2600 2600L Balanced Piston version of standard 2600 BalanSeal Design Use of serial suffix changed from A12 to A13 for consistency of numbering system Nov 1997 present A12 1978 Nov 1997 A11 R 2600 BalanSeal Design O Ring air steam vapor services Modified D through K orifice O ring seat design that replaced the modified A10 M A11 M O rin...

Page 6: ...onstruction C Conventional with O ring seat pressure seal D BalanSeal with O ring seat pressure seal E BalanSeal with auxiliary balancing piston F BalanSeal with auxiliary balancing piston and O ring seat pressure seal T Teflon seat conventional U Teflon seat BalanSeal Note Items listed in RED are for non current nomenclature designations or options no longer offered The U Z orifices are not API s...

Page 7: ...K 63 to 83 AARH inlet outlet X High pressure hub style connection 2 Screwed Cap 3 Bolted Cap 4 Packed Lever 5 L Type Packed Lever 6 R Type Packed Lever 7 Open Lever 8 Remoter with Packed Lever 0 Without Gag 1 With Gag See Materials for Corrosive Service Table below 1 Spring adjusting screw in standard material 2 The springs shown assume bellows construction For conventional construction use Incone...

Page 8: ...factory for a cross section drawing for the actual valve size and pressure rating Figure 4 1 4 Valve Cross Section Parts and Construction 3 5 1 28 7 13 25 24 12 9 10 11 21 17 2 8 14 19 20 23 22 6 4 Cap 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 H...

Page 9: ...nless Steel Stainless Steel 11 Jam Nut S A S 316 St St 316 St St 12 Lock Screw B D R 316 St St 316 St St 13 Lock Screw Stud 316 St St 316 St St 14 Stem Retainer 17 4 Ph St St 17 4 Ph St St 15 Bellows not shown N A Inconel Composite 16 Bellows Gasket not shown N A Non Asbestos 17 Spring Button Carbon Steel Rust Proofed Carbon Steel Rust Proofed 18 Body Stud ASME SA 193 Gr B7 Alloy Steel ASME SA 193...

Page 10: ...10 Figure 4 2 Figure 4 3 Internals for Orifice D J Internals for Orifice K P BalanSeal Bellows Safety Valve Internals for Orifice Q U Figure 4 5 Figure 4 4 ...

Page 11: ...ightness may be adversely affected Store transport and install valves with the stem in the vertical position In practice a repaired pressure relief valve including one that has been only cleaned or readjusted is called upon to provide the same degree of protection as a new valve It follows that maintenance personnel must be trained to a level of proficiency that enables them to restore a valve to ...

Page 12: ...e results of this inspection should be noted on appropriate forms It is generally considered important to determine the set pressure of the valve when removed from service and prior to the valve being disassembled If the valve opens at the set pressure the valve need not be tested further to determine the as received relieving pressure If the initial pop is higher than the set pressure it is advis...

Page 13: ... evidence of deposits of foreign material and for corrosion Note the condition of external surfaces and look for any indication of corrosion or evidence of mechanical damage Check and note the body nozzle and bonnet wall thickness thread and stud condition Verify valve components and material and check against nameplate information Disassembly Instructions Farris 2600 Series valves should be disas...

Page 14: ...assembly Spring 20 and Spring Buttons 17 from the Stem 9 The spring assembly must be kept together The Spring Buttons 17 should be tagged for later identification as the upper and lower buttons may not be identical 8 Using the Stem 9 as a handle lift the complete internal assembly from the valve Body 1 Figure 6 4 a On larger valves a hoist is advisable due to the weight of the internal assembly b ...

Page 15: ... key Figure 6 8 c Locking tension is relieved by threading the lock screw UP INTO the Stem Retainer 14 d Allen key wrench sizes are shown in Table 6 1 e Be careful not to damage the guiding surface of the Stem Retainer 14 during disassembly f For bellows valves see Appendix B 13 Remove the Blow Down Ring 7 from the Nozzle 5 14 Turn the valve Body 1 over and re clamp to the work bench With a spanne...

Page 16: ...e replaced The guiding surfaces on the sleeve guide and stem retainer should be checked for evidence of pitting corrosion distortion or galling If found these parts should be replaced Stems should be inspected as follows 1 Check the bearing point on the stem tip for a smooth surface Lap if necessary against the mating part to improve the surface If the spherical contact is destroyed the stem shoul...

Page 17: ...p to the disc outside diameter Avoid excessive chucking force 2 True up the disc by means of an indicator ensuring that the disc outside diameter and seat face are true with each other within 0 002 full indicator reading 3 Machine light cuts across the seat at 90 to the axis until the damaged areas are removed facing to the smoothest possible finish Rigidity of the cutting tool is critical 4 Relap...

Page 18: ...machines ALWAYS FOLLOW THE MANUFACTURER S OPERATING INSTRUCTIONS Thoroughly clean all contaminates from the seat area of the nozzle or disc to be lapped Place the nozzle or disc seating area on the lapping plate Turn on the machine and adjust the flow of lapping fluid which should be enough to keep the lapping plate covered with a thin film The lapping plate should be neither dry nor overly lubric...

Page 19: ...uide Stem Retainer D D D 15 Stem Retainer Stem A A A 16 Spring Button Stem A A A 17 Spring Button Spring Adjusting Screw A A A Sealant 18 Body Nozzle A A A 19 Body Bonnet Sleeve Guide Gaskets A A A 20 Bonnet Gasket Cap if applicable A A A 21 Bellows Gasket B B B Assembly Instructions Farris 2600 Series valves should be assembled as described below Parts identification may be found in Figure 4 1 on...

Page 20: ...p facing down Be sure that the guiding motion is smooth 12 Thread the Stem 9 and Stem Retainer 14 together Be sure this connection is free floating Figure 9 5 13 Lower the Assembly Stem 9 Sleeve Guide 8 and Disc Holder 6 into the Body 1 counter bore Figure 9 6 14 Place the Bonnet Gasket 23 on the Sleeve Guide 8 or secure with sealant in the Bonnet 2 counter bore 15 Place the lower Spring Button 17...

Page 21: ...perly positioned in the respective counter bores 21 Thread the Jam Nut SAS 11 onto the Spring Adjusting Screw SAS 10 22 Thread the SAS 10 into the Bonnet 2 to the position indicated in disassembly notes 23 Valve should now be ready for testing final assembly and sealing 24 Following testing place the Cap Gasket 21 on the Bonnet 2 25 Thread the Cap 3 onto the Bonnet 2 and wire seal NOTES 1 For Bala...

Page 22: ...ufficiently to cause the test drum pressure to continue to increase 2 psi sec until the valve pops A test gauge connected to the test drum in a static pressure zone will indicate the pressure the valve pops Further spring setting adjustments may be necessary to achieve the desired set pressure of the valve The tightness of a pressure relief valve on gas or vapor service is closely connected with t...

Page 23: ...er the valve is satisfactorily checked for set pressure it is necessary to check the valve for seat leakage It is important to minimize leakage from pressure relief valves Excessive leakage could lead to fouled and inoperable valves serious product loss and could also be hazardous to personnel and equipment The valve can be tested for tightness on the test stand by increasing the pressure on the v...

Page 24: ...t 50 psig or below the pressure shall be held at 5 psig below the set pressure Above 50 psig set pressure hold the pressure at 90 of the set pressure Maximum Seat Leakage Rates for Metal Seated Pressure Relief Valves Set Pressure psig Leakage Rate Bubbles per Minute F Orifice and Smaller G Orifice and Larger 15 1000 40 20 1500 60 30 2000 80 40 2500 100 50 3000 100 60 4000 100 80 5000 100 100 6000 ...

Page 25: ... are the linear expansion of the body and top works which reduces the spring loading and the direct effect of temperature on the spring itself It is customary to compensate for this effect by increasing the setting when a valve is set at ambient conditions on a test stand and the valve is intended for a higher operating temperature in service Although the adjustment is approximate and may be outwe...

Page 26: ...Seat 71 to 1000 3 10 10 Metal Seat Soft Seat 1001 to 6000 3 10 10 Final Notes Once your valve has been assembled and tested make sure that you have completed all necessary records before placing it back in service These records are important for the effective future use of the valve They will provide some guidance as to when to retire valves and replace components as well as providing the historic...

Page 27: ...p should be gradual The valve contains a bellows and the bonnet is not vented Remove bonnet pipe plug so that the bonnet is exposed to atmospheric pressure Leakage The seats are damaged Lap the seats to remove the damage If the scratches are deep machining may be required Remove any foreign particles from the system to prevent scoring the seats The system operating pressure is too close to the val...

Page 28: ...the performance characteristics of the pressure relieving device Appendix A Valve Terminology Maximum Allowable Working Pressure Maximum allowable working pressure is the maximum gauge pressure permissible at the top of a completed vessel in its operating position for a designated temperature This pressure is based on calculations for each element in a vessel using nominal thicknesses exclusive of...

Page 29: ...e flange of the bellows to the base of the bellows test fixture as illustrated in Figure B 1 3 Compress the bellows approximately 1 8 inch with a securing bar so that the bellows does not elongate when pressure is applied as in Figure B 1 4 Fill the disc holder with water Omit this step for D E Balanseal designs as these designs have a one piece disc holder stem retainer 5 Apply 30 psig pressure t...

Page 30: ...cordance with ASME Code For all other orifices Refer to B 4 below 1 Place the Bellows Gasket 16 on the Stem Retainer 14 2 Place the Bellows 15 on the Stem Retainer 14 3 Thread the Disc Holder 6 to the Stem Retainer 14 using the special assembly block 4 Thread the Lock Screw 19 counter clockwise until contact is made with the Disc Holder 6 See Figure B 1 for bellows leak test 5 Do not thread Pipe P...

Page 31: ...no leakage at 90 of set pressure for both conventional and bellows valves following Farris standard seat tightness test procedure At set pressures of 50 psig and below leakage test shall be made at 5 psig below set pressure The O ring seat seal option is available for 2600 2600L 2600S Series valves in both conventional and bellows construction Farris Engineering has two different O ring designs wh...

Page 32: ...L thru U See Table 6 1 O Ring Seat Construction Assembly Disassembly Instructions The following instructions are assembly instructions For disassembly reverse the order Parts identification can be found on page 31 Follow the same procedures as for conventional type valves except as follows To connect the Disc Holder to the Stem Retainer for O ring valves use the allen key sizes found in Table C 1 ...

Page 33: ...Packing Rings over the Cam Shaft and into the Retaining Ring cavity 6 While holding the Cam in place inside the Cap slide the Cam Shaft through the hole in the side of the Cap and through the Cam 7 Place the Cap onto the Bonnet ensuring that the cap protrusion is facing the valve outlet Packed Lever Construction Assembly Disassembly Instructions The following instructions are assembly instructions...

Page 34: ...t For double acting lever only 1 Thread the Stem Test Nut onto the Stem 2 Thread the Stem Jam Nut onto the Stem 3 Place the Cap onto the Bonnet ensuring that the cap protrusion is facing the outlet of the valve 4 Thread the Cap Studs through the Cap into the Bonnet and tighten 5 Place the Fork Round Head Rivet through the Test Lever Fork and Cap hole and secure with a Cotter Pin 6 Place the Lever ...

Page 35: ...Shaft 316 St St Gland 316 St St Stem Jam Nut 316 St St Stem Test Nut 316 St St Packing Ring Graphite Plain Washer Steel Lever Hex Jam Nut Steel Cap Stud Alloy Steel Stainless Steel Stainless Steel Cap Hex Nut Alloy Steel Stainless Steel Stainless Steel Open Lever Single or Double Acting Cap Iron Test Lever Iron Test Lever Fork Iron Stem Jam Nut 316 St St Stem Test Nut 316 St St Cap Screw Steel Pla...

Page 36: ...10 0 010 4 093 1 2 4 0 844 0 885 0 945 0 005 0 010 4 234 1 0 845 0 296 1 5 0 844 0 885 0 995 0 005 0 010 5 031 1 6 0 844 0 885 0 995 0 005 0 010 0 010 5 031 2 26H z 0 1 1 054 1 110 1 170 0 005 0 010 4 937 1 2 1 054 1 110 1 170 0 010 0 010 4 156 1 33 1 054 1 110 1 210 0 005 0 010 5 031 1 1 070 0 296 1 4 5 1 054 1 110 1 210 0 005 0 010 5 031 1 26H 33 1 054 1 110 1 170 0 010 0 010 4 156 1 26J z 0 1 1...

Page 37: ...r Finish Mirror Finish 005 030 005 030 Mirror Finish Mirror Finish C C C L L L F F F N minimum length minimum thickness Nozzle Figure 1 Disc Figure 1 Nozzle Disc Disc Figure 2 Nozzle Figure 2 Nozzle Figure 3 United States A10 serial numbers 30000 and above A11 serial numbers 4000 and above Canada A10 A11 serial numbers C12001 and above ...

Page 38: ...00 005 C 000 002 D min F min L min Figure 26D z 0 3 0 520 0 615 0 078 0 01 4 141 4 42 4 375 26E z 0 3 0 585 0 800 0 01 4 081 5 42 4 375 26F z3 0 0 720 0 880 0 078 0 01 4 219 4 2 3 4 344 42 4 344 26G z 0 0 885 1 052 0 01 4 063 5 2 3 4 203 42 4 203 26H z 0 1 110 1 255 0 078 0 01 4 906 4 2 4 125 3 5 000 42 5 000 26J z 0 1 416 1 568 0 094 0 01 4 094 4 2 3 5 156 42 6 531 26K z 0 3 1 730 1 937 0 094 0 0...

Page 39: ...39 L minimum length Nozzle C B D 15 60 45 C L F Nozzle Figure 4 C B 60 45 C L F Nozzle Figure 5 O ring Seats A10 A11 A14 A15 Critical Dimensions Refer to table E 2 ...

Page 40: ...150 4 950 4 170 5 040 5 040 26J z 0 2 3 42 1 416 1 536 4 170 5 230 6 600 1 416 1 456 4 170 5 230 6 600 26K z 0 3 42 1 730 1 877 6 590 7 960 1 730 1 770 6 590 7 960 General Notes 1 Z column designates flange class number to be inserted in type number example 26D 3 would designate any of the D orifice 2600 designs conventional or bellows with a 600 inlet flange 2 Applies to valves with the A10 A11 s...

Page 41: ... minimum length Nozzle C B 0 025 min 60 45 C L 0 01 min Nozzle Figure M C B 60 45 45 C L 0 01 min Nozzle Figure R O Ring Seats A10 M A11 M A14 M A15 M A10 R and A11 R Critical Dimensions Refer to table E 3 ...

Page 42: ...520 0 613 0 005 0 015 010 4 375 2 0 480 0 156 2 26E 0 0 535 0 585 0 645 0 005 010 4 062 1 0 545 0 725 0 234 1 26E 1 0 535 0 585 0 645 0 005 010 4 062 1 0 545 0 725 0 234 1 26E 2 0 535 0 585 0 645 0 005 010 4 062 1 0 545 0 725 0 234 1 26E 3 0 535 0 585 0 645 0 005 010 4 062 1 0 545 0 725 0 234 1 26E 4 0 535 0 585 0 685 0 005 0 015 010 4 375 2 0 545 0 725 0 234 1 26E 5 0 535 0 585 0 685 0 005 0 015 ...

Page 43: ...ish Mirror Finish Mirror Finish 015 030 015 030 Mirror Finish C C L L F F N minimum length minimum thickness Nozzle Figure 1 Disc Figure 1 Nozzle Disc Disc Figure 2 Nozzle Figure 2 Metal Seats A10 A11 Interim Critical Dimensions Refer to Table E 4 ...

Page 44: ...e Remarks Maintenance Engineers Phone No Unit Location Historical Record Date Tested Popped Reseat Disposition Condition Repairs Remarks The information in the below form is typical of the data that should be recorded for all valves This information should be compiled for new valves as well as valves removed from service for maintenance This form should be photocopied and used as part of any repai...

Page 45: ...5 8 1 3 4 2 2 1 4 2 3 4 3 1 4 3 1 2 3 11 16 3 3 4 5 5 1 4 5 3 4 6 6 3 16 Allen Wrenches 3 16 7 32 3 8 Adjustable Pin Spanners 1 1 4 to 3 2 to 4 3 4 4 1 2 to 6 1 4 8 1 2 10 5 8 Adjustable Hook Spanners 2 to 4 3 4 4 1 2 to 6 1 4 6 1 8 to 8 3 4 9 1 4 Adjustable Wrenches Flat Head Screw Drivers Wire Cutters Super Joint Pliers Pipe Wrench O Ring Pick Flashlight ...

Page 46: ...ue jam nut to 25 30 Ft Lbs 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 2 Install nuts on the studs f...

Page 47: ...47 Notes ...

Page 48: ...T Centers offer quick localized testing and repair of valves or the prompt installation of new Farris ASME certified valves Mobile Repair Units Available at select FAST Centers Experienced Farris Engineering recognizes the value of having pressure relief valve experts as close to the customer as possible This is accomplished through comprehensive training offered at the factory or on site FAST Cen...

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