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Instructions-Parts
Dosing Valve
For use with XM and Xtreme Mix
Part No. 255478, Series B
XM Sprayer Dosing Valve Assembly
Maximum working pressure 7250 psi (50 MPa, 500 bar)
Part No. 245846, Series A
™
Xtreme Mix
Sprayer Dosing Valve Assembly
Maximum working pressure 7250 psi (50 MPa, 500 bar)
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
™
plural-component sprayers. For professional use only.
313342D
EN
r_313259_313342_1
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Summary of Contents for Graco 255478
- Page 1 313342D ™ For use with XM and Xtreme Mix plural-component sprayers. For professional use only. Part No. 255478, Series B XM Sprayer Dosing Valve Assembly Maximum working pressure 7250 psi (50 MPa, 500 bar) Part No. 245846, Series A ™...
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Page 2: Table Of Contents
Dimensions ......11 313292 XM OEM, Instructions-Parts Graco Standard Warranty ....12 High Flow Severe Duty Shutoff Check Graco Information . -
Page 3: Warnings
Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where applicable. - Page 4 Warnings WARNING WARNING WARNING WARNING MOVING PARTS HAZARD Moving parts can pinch or amputate fingers and other body parts. • Keep clear of moving parts. • Do not operate equipment with protective guards or covers removed. • Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure in this manual.
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Page 5: Setup
5. Use new o-ring (36) when replacing recirculation valve (R). If not using valve (R), plug port with plug 1. Remove plug (31) if 255478 will be used on a (33). See parts illustration on page 8. machine with pressure transducers (P). -
Page 6: Repair
Replace air cylinder seals: 1. Unscrew cylinder (4) from cap (2). NOTE: For 255478 only: A phillips screwdriver can be used as a handle in the holes on the flats to unscrew cap (2). 2. Unscrew locknut (11). 3. Remove piston (3) and replace o-rings (12, 13, 14, and 23). - Page 7 Repair 313342D...
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Page 8: Parts
Parts Parts 255478, Dosing Valve for XM Plural-Component Sprayers Apply pipe sealant to non-swiveling pipe threads. Apply lubricant to threads, o-rings, and seals. Apply blue thread lock. Thread to bottom. r_313259_313342_3 Torque to 5-7 ft-lbs (7-9 N•m). Replace o-rings (25) when seat housing (26) is removed. - Page 9 Parts ™ 245846, Xtreme Mix Dosing Valve TI2299A Apply pipe sealant to non-swiveling pipe threads. Clean needle (10) and packing cavity before reinstalling, Apply lubricant to threads, o-rings, and seals. packings (17, 18, 19). Lubricate packings and install with lips facing down away from packing nut (7) in order Apply blue thread lock.
- Page 10 ✖ Series A valves used the 598140 5/32 OD fitting. rately). Series B valves use the 112781 1/4 in. OD fitting. † Parts included in Rebuild Kit 234131 (purchase sep- arately). Repair kits 234098 and 234131 work for either 255478 or 245846 dosing valves. 313342D...
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Page 11: Technical Data
Outlets ........ -
Page 12: Graco Standard Warranty
With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
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