Farris Engineering Curtiss-Wright 1890 Series Maintenance Manual Download Page 12

© 2010 Farris Engineering 

Printed in U.S.A. 

11/10 3M R1

10195 Brecksville Road, Brecksville, OH 44141 USA  

  Telephone: 440-838-7690  

• 

 Fax: 440-838-7699  

  http://farris.cwfc.com

Facilities:

 Brecksville, Ohio, USA; Brantford, Ontario, Edmonton, Alberta, Canada; Bridport, Dorset, UK; Delhi, India; Tianjin, Beijing, China; Dubai, U.A.E.

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. Nothing contained herein is to be construed as a warranty or guarantee, expressed or implied, regarding the performance, merchantability, 

fitness or any other matter with respect to the products, nor as a recommendation to use any product or process in conflict with any patent. Farris Engineering, division of  

Curtiss-Wright Flow Control Corporation, reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.

Repair valve FAST tags 

New valve FAST tags 

Farris Aftermarket Services

FAST Track Turnaround

Farris Engineering is dedicated to making our FAST Program work for you, which is 
why we have the FAST Track Center at our headquarters in Brecksville, OH. For 
urgent service requirements, our FAST Track Center has a large inventory of 
spare parts, finished valves, and dedicated machining and material resources. 
Farris can provide quick turnaround on inventory and machined parts for both 
current and obsolete valve designs.

FAST Centers

Our FAST Centers are a global network of independently owned and operated 
valve repair facilities offering: 

  Total valve replacement, service and repair any hour, any day: 24/7 – 365

  Local pressure relief valve inventories, plus a Web-accessible global inventory

  Factory trained, ASME and VR certified professionals

  Asset management solutions to keep plants safe 

Look for the FAST tag, your assurance  
for quality and safety.

In the US or Canada contact 1-877-FARRIS1 or  
1-877-327-7747 to find the location of your nearest  
FAST Center, or for a global listing go to

 

http://farris.cwfc.com/Services/spokes/fast_centers.asp

Summary of Contents for Curtiss-Wright 1890 Series

Page 1: ...Technical Manual 1098T R1 Pressure Relief Valve Maintenance Manual ...

Page 2: ...r will lead to potentially dangerous operating conditions When following these instructions refer to the drawing for your specific product 2 Safety Tips Make sure that the Pressure Relief Valve is isolated from the pressure source before it is removed Wear protective clothing when removing valves from service in order to prevent coming in contact with any toxic or corrosive fluids which may be tra...

Page 3: ... spring and buttons Note on some valves the upper and lower spring buttons are different 11 Pull up on stem and lift out the trim assembly consisting of the sleeve guide stem retainer disc holder disc and bellows if so equipped 12 Hold the top of the stem retainer and pull up on stem and turn counterclockwise to remove from the stem retainer Remove the sleeve guide 13 Remove the disc from the disc...

Page 4: ...Nozzle 16 Bellows Gasket 27 Pipe Plug Body 6 Disc Holder 17 Spring Button 28 Pipe Plug Bonnet 7 Blow Down Ring B D R 18 Body Stud 29 Flat Head Machine Screw 8 Sleeve Guide 19 Hex Nut Body 30 O Ring Retainer 9 Stem 20 Spring 31 O Ring Seat Seal 10 Spring Adjusting Screw 21 Cap Gasket 32 Jack Screw Plug 11 Jam Nut Spr Adj Scr 22 Body Gasket Conventional design does not use bellows and bellows gasket...

Page 5: ...e 8 On 2850 2856 Series remove the blow down ring lock screw and gasket 9 Thread a pipe into the outlet and turn the bonnet counterclockwise removing it from the body 10 Remove the stem with spring and buttons attached On Series 2850 and 2856 valves the upper and lower spring buttons are different 11 Remove the spring and buttons from the stem 12 On the 2850 and 2856 Series the disc is held to the...

Page 6: ... Nut Spr Adj Scr 16 Lift Stop Ring 3 Cap 10 Blow Down Ring 17 Retaining Ring Stem Shoulder 4 Disc 11 Lock Screw B D R 18 Cap Gasket 5 Disc Holder 12 Spring 19 Body Gasket 6 Guide 13 Spring Button 20 Guide Gasket 7 Stem 14 Stem Shoulder 21 B D R Lock Screw Gasket Series 2700 Series 2850 2856 Figure 3 ...

Page 7: ...hreaded Valves B Threaded Valves Parts List Lever Assemblies Item Part Name Item Part Name 1 Cap 12 Test Lever Fork 2 Test Lever 13 Lever RD HD Rivet 3 Cam 14 Groove Pin 4 Cam Shaft 15 Set Screw 5 Gland 16 Gland Nut 6 Stem Test Washer 17 Cap Screw 7 Stem Jam Nut 18 Cap Stud 8 Button Head Rivet 19 Fork RD HD Rivet 9 Packing Ring 20 Cotter Pin 10 Plain Washer 21 Gland Nut Gasket 11 Lever hex Jam Nut...

Page 8: ...ling Gaskets and soft goods such as O ring seals should always be replaced Never perform a repair using the old gaskets and O rings To ensure proper valve performance the nozzle seat and disc must be lapped flat to a mirror finish This can be accomplished using cast iron lapping blocks Pyrex lapping glasses or on a lapping machine These devices are used in conjunction with special lapping compound...

Page 9: ...ens at the required pressure designated as the cold differential test pressure CDTP The set pressure tolerance is equal to 3 of the set pressure Pressure Relief Valve Test Fluids Service Fluid Test Fluid Air gas vapor Air or gas Steam Steam Liquid Water Table 2 Air may be used for ASME Code Section VIII valves 6 Lock the jam nut in place and pop the valve once more to ensure the set pressure adjus...

Page 10: ...ifice Size 0 307 Sq In 200 mm2 15 to 1000 1 03 to 68 9 40 20 1500 103 60 30 2000 138 80 40 2500 172 100 50 3000 207 100 60 4000 276 100 80 5000 345 100 100 6000 413 100 100 4 Steam Test pressure per paragraph 2 shall be applied for 3 minutes before the seat tightness test The valve should be observed for leakage for at least one minute There should be no visible sign of leakage at the valve outlet...

Page 11: ...10 ...

Page 12: ...lter or improve the designs or specifications of the products described herein Repair valve FAST tags New valve FAST tags Farris Aftermarket Services FAST Track Turnaround Farris Engineering is dedicated to making our FAST Program work for you which is why we have the FAST Track Center at our headquarters in Brecksville OH For urgent service requirements our FAST Track Center has a large inventory...

Reviews: