Nordson 25B Customer Product Manual

4:1 plated steel pump

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25B 4:1 Plated Steel Pump

Customer Product Manual

Document Number

1044131-06

Issued 01/24

For parts and technical support, call the Industrial Coating

Systems Customer Support Center at (800) 433-9319 or

contact your local Nordson representative.

This document is subject to change without notice.

Check

http://emanuals.nordson.com

for the latest version.

NORDSON CORPORATION • AMHERST, OHIO • USA

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Table of Contents

Summary of Contents for Nordson 25B

Page 1 For parts and technical support, call the Industrial Coating Systems Customer Support Center at (800) 433-9319 or contact your local Nordson representative. This document is subject to change without notice. Check http://emanuals.nordson.com for the latest version. NORDSON CORPORATION • AMHERST, OHIO • USA...
Page 2 Nordson Corporation welcomes requests for information, comments, and inqui- This is a Nordson Corporation publication which is protected by copyright. ries about its products. General information about Nordson can be found on the Original copyright date 2004. No part of this document may be photocopied,...
Page 3: Table Of Contents
Solvent Chamber Fill ................................................4-2 Flushing Frequency ............................. Cleaning Solution for Flushing...................... System Flushing ........................... Routine Startup ..........................Preparation ........................... Startup ............................Routine Shutdown ........................Maintenance ..........................Daily .............................. Weekly ............................Every Four to Six Months ......................1044131-06 ©2024 Nordson Corporation...
Page 4 Air Exhaust ........................... Correcting Siphon Problems......................Cavitation ............................ Priming Problems ........................Preventing Air Valve and Muffler Freezing ................... 25B Air Valve and Air Motor Repair ..................... Introduction ............................ Air Valve Repair ..........................Tools and Materials Required ....................... Air Valve Removal ........................
Page 5 Table of Contents 25B 4:1 Plated Steel Hydraulic Section Parts ................Parts .............................. Using the Illustrated Parts List ...................... 4:1 Replacement Packing Glands ....................4:1 Type F Hydraulic Section Parts ....................4:1 Replacement Packing Glands ....................Packing Gland Materials and Applications ..................
Page 7 Change Record Change Record Revision Date Change 11/20 Initial Release 01/24 Updated Quantity of 3/8-16 nut (PN 984163), Images Updated 1044131-06 ©2024 Nordson Corporation...
Page 9: Safety
Refer to 25B 4:1 Plated Steel Pump Manual 1044131 for complete service and parts information. For parts and technical support call (800) 433-9319 Introduction Use this section for quick access to the following information on the 25B 4:1 Plated Steel pump: •...
Page 10: Operating Sound Levels
Fluid inlet (siphon) size: 3/4 in. NPT WARNING: Use Nordson or equivalent nylon or PTFE fluid hoses, with electrical continuity between fittings. Hoses must be capable of withstanding the maximum output pressure of the pump. Use flexible hoses between the pump and the fluid system to dampen vibrations.
Page 11: Pump And Subassemblies
106308 SERVICE KIT, siphon check, 25B NOTE: A. Refer to “25B 4:1 Plated Steel Hydraulic Section Parts” on page 9-1 for a parts breakdown. Packing Glands and Kits Refer to the Packing and Solvent Chamber Fluid Selection Guidexx included in the Appendix of this manual for information on selecting the correct packing glands and solvent chamber fluids for your application.
Page 12: Recommended Spare Parts
FLUID, type-T, pump chamber, one quart 244854 FLUID, type-Q concentrate (2.3 fluid ounce, makes one gallon) Quick Reference − 25B 41 Plated Steel Pump Quick Reference − 25B 41 Plated Steel Pump © 2024 Nordson Corporation © 2024 Nordson Corporation...
Page 13: Options
Kit contains filter, regulator, lubricator, air hose, fittings, 1024722 ACCESSORY GROUP, air motor, 3/8-inch brackets and fasteners, and lubricating oil. Refer to 25B Air Motor and Air Valve Parts for the kit parts list Kit contains wall mounting bracket and fasteners; solvent chamber filler cup;...
Page 14 Quick Reference − 25B 41 Plated Steel Pump Quick Reference − 25B 41 Plated Steel Pump © 2024 Nordson Corporation © 2024 Nordson Corporation...
Page 15: Safety
Intended Use Use of Nordson equipment in ways other than those described in the documentation supplied with the equipment may result in injury to persons or damage to property. Some examples of unintended use of equipment include: •...
Page 16: Personal Safety
• Make sure the spray area is adequately ventilated. To prevent injury, be aware of less- obvious dangers in the workplace that often cannot be completely eliminated, such as hot surfaces, sharp edges, energized electrical circuits, and moving parts that cannot be enclosed or otherwise guarded for practical reasons. 1044131-06 © 2024 Nordson Corporation...
Page 18: Fire Safety
Chlorine “Chloro-” Bromine “Bromo-” Iodine “Iodo-” Check your material SDS or contact your material supplier for more information. If you must use halogenated hydrocarbon solvents, contact your Nordson representative for information about compatible Nordson components. 1044131-06 © 2024 Nordson Corporation...
Page 19: Action In The Event Of A Malfunction
• Disconnect and lock out system electrical power. Close hydraulic and pneumatic shutoff valves and relieve pressures. • Identify the reason for the malfunction and correct it before restarting the system. Disposal Dispose of equipment and materials used in operation and servicing according to local codes. 1044131-06 © 2024 Nordson Corporation...
Page 20: Safety Labels
Do not use halogenated hydrocarbon solvents in this system, it contains aluminum parts only) and may explode. Cleaning agents, coatings, paints or adhesives may contain halogenated hydrocarbon solvents. Don’t take chances, consult your material supplier to be sure 1044131-06 © 2024 Nordson Corporation...
Page 21 Safety (Aluminum Pumps Only) Figure 1 Safety Labels Figure 2 ATEX/Ex Label 1044131-06 © 2024 Nordson Corporation...
Page 23: Description
Description Section 2 Description Introduction This section provides you with a brief overview of 25B pump versions and applications, options, and pump operation. NOTE: The information in this section is common for all versions of the 25B pump. Pump Versions The 25B pump is available in the following versions.
Page 24: Pressure Stroke
A small amount of leakage is normal. If the solvent cup fills quickly and overflows the packings need to be replaced. Both upper and lower packings should be replaced at the same time. 1044131-06 © 2024 Nordson Corporation...
Page 25 10. Pressure ball check 2. Air Motor 7. Plunger 11. Siphon ball check 3. Hydraulic section 8. Solvent chamber 12. Siphon port 4. Shifting mechanism 12. Diaphragm 13. High-pressure port 5. Piston 13. Upper and lower packings 1044131-06 © 2024 Nordson Corporation...
Page 26: Dead-End And Circulating System Operation
Options Refer to the Options section in the 25B 4:1 Plated Steel Pump Quick Reference Guide, 25B Air Valve and Air Motor Repair and 25B 4:1 Plated Steel Hydraulic Section Parts for information on the following options: • Air Motor Accessory Kit, consisting of an air filter, regulator, gauge, and lubricator, along with fittings, mounting brackets, fasteners, and lubricating oil.
Page 27: Installation
NOTE: The information in this section is common for all versions of the 25B Pump. All illustrations in this section show the 2:1 version of the pump, but installation procedures are same for all versions.
Page 28: Grounding
Failure to use grounded hoses could result in a fire or explosion. Refer to 25B 4:1 Plated Steel Pump Quick Reference Guide for optional siphon accessory and circulation kit part numbers. Use flexible hoses for both siphon and high pressure connections to act as a vibration damper.
Page 29 2. 1/2−20 JIC x 1/4 in. NPT elbow 3. Return hose (customer- kit) supplied) 4. 7/8−14 x 3/4 in. NPT elbow 5. Siphon hose 6. Drain hose and rod NOTE: Items 4 and 5 are included in the optional Wall Mounting kit. 1044131-06 © 2024 Nordson Corporation...
Page 30: Compressed Air Connection
8. Solvent filler cup NOTE: The parts listed are included in the Air Motor Accessory kit. Refer to 25B Air Valve and Air Motor Repair, for kit parts list. The filter/regulator/lubricator assembly is a generic representation. The actual assembly may look different.
Page 31: Installation Guidelines
• Ground all system components, waste containers, and coating supplies. The only exception to this rule is electrostatic systems where the coating supply is charged at the supply rather than at the spray device. 1044131-06 © 2024 Nordson Corporation...
Page 32 4. Air shut off valve (self-relieving) 5. Air filter 6. Regulator and gauge 7. Lubricator 8. Air hose 9. Coating supply 10. Siphon rod and strainer 11. Siphon hose 12. High-pressure fluid hoses 13. Fluid filter 14. Spray gun 1044131-06 © 2024 Nordson Corporation...
Page 33: Installation Guidelines (Con't)
10. Siphon rod and strainer 11. Siphon hose 12. High-pressure fluid hoses 13. Fluid heater 14. Fluid filter 15. Spray device 16. Circulation valve 17. Drain valve 18. Drain hose and rod 19. Waste container 1044131-06 © 2024 Nordson Corporation...
Page 35: Operation And Maintenance
The information in this section is common for both the aluminum and stainless steel versions of the 25B Pump. All illustrations in this manual show the aluminum version of the pump. The stainless steel versions look different, but operate in the same way.
Page 36: Solvent Chamber Fill
Refer to Safety for more information. When flushing the pump or system, use a cleaning solution or solvent compatible with the pump construction, packing gland type, other system components, and the coating material used. 1044131-06 © 2024 Nordson Corporation...
Page 37: System Flushing
9. Trigger the spray devices to flush out the cleaning solution and air. 10. Stop the pump, relieve the system pressure, and install the spray device nozzles. 11. Start the pump and trigger the spray devices. When the spray devices stop spitting air, you can resume production. 1044131-06 © 2024 Nordson Corporation...
Page 38 5. Coating or cleaning solution supply 6. Siphon rod and strainer 7. Fluid filter 8. Spray device 9. Fluid heater 10. Circulation valve 11. Drain valve 12. Drain rod 13. Waste container 14. High-pressure fluid hose 1044131-06 © 2024 Nordson Corporation...
Page 39: Routine Startup
--- pump ratio = air pressure required WARNING: Maximum air pressure for all versions of the 25B pump is 7 bar (100 psi). Do not exceed this pressure. Calculate the required air pressure for desired output pressure as shown in the following...
Page 40: Routine Shutdown
If the system will be shut down for more than a few days, flush it and leave it filled with cleaning solution. 4. Perform daily maintenance as described in Operation and Maintenance in this section. 1044131-06 © 2024 Nordson Corporation...
Page 41: Maintenance
See Figure 4-3. Remove the rear safety cover. Lubricate the snapper pivot points (1) and the end of the ball stem (2) with molybdenum-disulfide grease. Figure 4-3 Air Valve Shifter Mechanism Lubrication (Front View) 1. Snapper pivot points 2. Ball stem 1044131-06 © 2024 Nordson Corporation...
Page 42: Every Four To Six Months
4-8 Operation and Maintenance Every Four to Six Months Rebuild the air valve. Refer to 25B Air Valve and Air Motor Repair As Needed Flush the pump and system with a compatible cleaning solution. Change the solvent chamber fluid regularly. Remove the drain plug from the bottom of the solvent filler cup to drain the old fluid.
Page 43: Troubleshooting
This section contains troubleshooting procedures. These procedures cover only the most common problems that you may encounter. If you cannot solve the problem with the information given here, contact your local Nordson representative for help. Problem Page...
Page 44: Common Problems
If the shifter mechanism is not damaged, rebuild the air valve. Check the air supply for contamination. Rebuild the air valve if necessary. Remove and rebuild the air Air valve seals worn valve. Continued... 1044131-06 © 2024 Nordson Corporation...
Page 45: Excessive Or Constant Air Leakage From Air Motor Or Air Valve
If the problem continues, inspect the piston. Replace the piston if the seal is worn or damaged. Refer to 25B Air Valve and Air Motor Repair. Remove the safety covers from around the air motor. If air leaks from between...
Page 46: Pump Strokes Irregularly When Spray Device Is Triggered
Reduce the spray device nozzle or fluid tip size. Reduce the number of spray Output from spray devices exceeds pump capacity devices connected to the pump. Reduce the circulation rate. Continued... 1044131-06 © 2024 Nordson Corporation...
Page 47: Pump Fails To Siphon Coating Material
7. Apply compressed air to the circulation valve. If air bubbles from the siphon rod, replace the circulation valve needle and seat. Rebuild the ball check Leaking ball check valve valves. Continued... 1044131-06 © 2024 Nordson Corporation...
Page 48: Spray Pattern Has Tails Of Unatomized Coating Material At The Outer Edges
Add solvent or heat to the coating material at Material too viscous coating material to lower the the outer edges viscosity. Replace the nozzle or fluid Damaged nozzle or fluid tip tip. 1044131-06 © 2024 Nordson Corporation...
Page 49: Minimizing Pressure Deviations
• Immerse the pump inlet (use bucket or drum mount kits). • Use a positive pressure supply system to feed the pump. Normal supply pressures are 0.35−1.03 bar (5−15 psi). • Use ram (elevator) mounted pumps, inductor plates, or follower plates. 1044131-06 © 2024 Nordson Corporation...
Page 50: Priming Problems
• Install an air dryer to remove moisture from the air supply. • Install larger mufflers. • Remove the mufflers and install plumbing to exhaust the air to the outside of the building. 1044131-06 © 2024 Nordson Corporation...
Page 51: 25B Air Valve And Air Motor Repair
The air valve can be removed and repaired without removing the pump from its mounting. When repairing the valve, replace all gaskets and O-rings. Refer to 25B Air Motor and Air Valve Parts, for information on old style air valves with poppet spacers.
Page 52: Air Valve Disassembly
6-2 25B Air Valve and Air Motor Repair Air Valve Disassembly See Figure 6-1. Remove parts from the valve body (41) in the following order: 1. Gaskets (51) and O-ring (47). 2. Screws (36), lock washers (37), snapper assembly (A), and gasket (40).
Page 53: Snapper Rebuild
25B Air Valve and Air Motor Repair Apply O-Ring lubricant before installing. Figure 6-2 Air Valve Repair (2 of 2) 39. Arm 44. End bushing 48. O-rings (2) 41. Valve body 45. Screws (3) 49. Poppet guide 42. O-rings (2) 46.
Page 54: Air Valve Assembly
6-4 25B Air Valve and Air Motor Repair Apply molybdenum disulfied grease before installing. Figure 6-3 Snapper Repair 29. Snapper 33. Spacer 38. Bracket 30. Spring 34. Lock washer 55. Screw 31. Fork 35. Nut 56. Washer 32. Ball Stem...
Page 55: Air Valve Installation
• retaining ring pliers • large, clean work surface • container for solvent chamber fluid • O-ring lubricant (Parker O-Lube or equivalent) (Nordson part 1612251) • replacement parts or kits (refer to Section D1 Air Motor Parts) Preparation 1. If you are also going to repair the hydraulic section, flush the pump with a compatible cleaning solution.
Page 56: Separating The Air Motor And Hydraulic Section
6-6 25B Air Valve and Air Motor Repair 7. Lift the pump out of the bracket and move it to a clean work area. 8. Remove the two screws and rear cover from the air motor. Separating the Air Motor and Hydraulic Section 1.
Page 57: Air Motor Disassembly (Con't)
25B Air Valve and Air Motor Repair Air Motor Disassembly (con’t) Figure 6-5 Separating the Air Motor and Hydraulic Section 1. Screw 7. U-cup 16. Tie rods (3) 2. Lock washer 8. Nuts (3) 20. Square O-rings (2) 3. Spool 9.
Page 58: Piston Repair
6-8 25B Air Valve and Air Motor Repair Piston Repair Piston Disassembly CAUTION: Do not score the spool rod (5) or connecting rod (22). Any burrs will damage the seals and cause them to leak. 1. Put the piston assembly, connecting rod (22) up, in a vise with the upper jam nut (15) between the vise jaws.
Page 59: Piston Assembly
25B Air Valve and Air Motor Repair Piston Assembly See Figure 6-6. 1. Install the upper jam nut (15) onto the telescoping screw (17), with the recess for the special nut facing away from the slotted head of the telescoping screw. Thread the special nut (14) all the way onto the telescoping screw.
Page 60: Connecting The Air Motor And Hydraulic Section
6-10 25B Air Valve and Air Motor Repair Connecting the Air Motor and Hydraulic Section See Figure 6-4 on page 6-6. 1. Screw the connecting rod (22) into the plunger (A) and tighten securely. 2. Push the air motor and hydraulic section together. Install the four lock washers (27) and screws (28) and tighten them securely.
Page 61: 25B 4:1 Hydraulic Section Repair
Turn off the air supply when the pump starts to run away. 3. Perform steps 2 through 4 under Air Valve Removal in 25B Air Valve and Air Motor Repair. Remove the drain plug from the filler cup and drain the solvent chamber.
Page 62: Separating The Air Motor And Hydraulic Section
7-2 25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair 4. Disconnect the siphon and high-pressure fluid hoses, and the circulation valve, if used. 5. Remove the long nuts securing the pump to the mounting bracket. 6. Lift the pump out of the bracket and move it to a clean work area.
Page 63: Disassembly
25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Disassembly See Figure 7-2 on page 7-4. 1. Remove the three hex nuts (19) and lockwashers (18) from the tie rods (17). 2. Work the siphon ball check (16) off the pressure housing (12). Use a brass mallet if necessary.
Page 64: Disassembly (Con't)
7-4 25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Disassembly (con’t) Step 6 Step 7 Step 7 Align slot with port Step 7 Wood Blocks (Step 5) 100 mm (4 in.) Figure 7-2 Separating the Air Motor and Hydraulic Section 1.
Page 65: Cleaning, Inspection, And Parts Replacement
25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Figure 7-3 Separating the Air Motor and Hydraulic Section 3. Plunger 7. Lower back-up washer 4. Upper back-up washer 8. Ball 5. Energizing washer 9. O-ring 6. Piston cup 10.
Page 66: Type G Packing Gland Rebuild
7-6 25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Type G Packing Gland Rebuild Use the Type G hydraulic service kit to rebuild Type G packing glands as shown in Figure 7-4. Lubricate the U-cups with O-ring lubricant before installing them.
Page 67: Assembly
25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Assembly NOTE: Lubricate all O-rings and lower packing U-cups with O-ring lubricant before installing them. Tighten all threaded parts securely. See Figure 7-3 on page 7-5. 1. Place the flats on the top of the plunger (3) into a vise. Place the ball (8) into the plunger (3).
Page 68: Assembly (Con't)
7-8 25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Assembly (con't) Figure 7-5 Hydraulic Section Assembly (Steps 5-13) 1. Solvent chamber 12. Pressure housing 16. Siphon housing 2. Packing gland 13. Cage pin 17. Tie rods (4) 3.
Page 69: Returning The Pump To Service
25B Air Motor and Air Valve 25B 4:1 Hydraulic Section Repair Returning the Pump to Service 1. Apply PTFE paste to the air inlet nipple threads and muffler adapter threads. Install the cover, muffler adapters, mufflers, and air inlet nipple.
Page 71: 25B Air Motor And Air Valve Parts
A dash (—) is used when the part number applies to all parts in the illustration. The number in the Part column is the Nordson Corporation part number. A series of dashes in this column (−−−−−−) means the part cannot be ordered separately.
Page 72: Air Motor Parts
8-2 25B Air Motor and Air Valve Parts Air Motor Parts See Figure 8-1. Item Part Description Quantity Note — 245546 MOTOR, air, 25B 323001 • VALVE, air, 4-way 981182 • SCREW, socket head, #12−28 x 1.75 in., steel 983131 •...
Page 73 25B Air Motor and Air Valve Parts To Solvent Chamber (Section D2 Hydraulic Section Parts) Figure 8-1 Air Motor Parts 1044131-06 © 2024 Nordson Corporation...
Page 74: Air Valve Parts
• WASHER, flat, 0.266 x 0.625 x 0.049 in., zinc NOTE: A. Component of 25B air motor, part 245546. B. Noted parts are included in Service Kit, Seal, Air Valve, part 106103. Refer to 25B Air Valve and Air Motor Repair for kit parts list.
Page 76: Mufflers And Covers
8-6 25B Air Motor and Air Valve Parts Mufflers and Covers See Figure 8-3. These parts are installed on the air motor. Item Part Description Quantity Note 245491 COVER, air motor, MDL 25B 245493 PANEL, back, MDL 25B 902509 MUFFLER...
Page 77: Air Motor And Air Valve Service Kits
• WASHER, plate, end 940170 • O-RING, hot paint, 0.688 x 0.813 x 0.063 in. NOTE: A. Used with new air valve center block. B. Not used on 25B pump; for 64B pump only. NS: Not Shown 1044131-06 © 2024 Nordson Corporation...
Page 78: Air Valve Crankshaft And Arm Kit
8-8 25B Air Motor and Air Valve Parts Air Valve Crankshaft and Arm Kit See Figure 8-2 on page 8-5 for air valve parts. Item Part Description Quantity Note − 106314 SERVICE KIT, crankshaft and arm 246468 • ARM 941080 •...
Page 79: Adhesives, Sealants, And Lubricants
25B Air Motor and Air Valve Parts Figure 8-4 Air Motor Accessory Group Adhesives, Sealants, and Lubricants Use these adhesives, sealants, and lubricants when servicing your air motor. Refer to 25B Air Valve and Air Motor Repair for application instructions. Part Description Quantity...
Page 81: 25B 4:1 Plated Steel Hydraulic Section Parts
A dash (—) is used when the part number applies to all parts in the illustration. The number in the Part column is the Nordson Corporation part number. A series of dashes in this column (−−−−−−) means the part cannot be ordered separately.
Page 82 9-2 25B 4:1 Plated Steel Hydraulic Section Parts 4:1 Replacement Packing Glands Packing Glands and Hydraulic Service Kits for 4:1 25B Pump Item Part Description Quantity Note − 247535 PUMP, hydraulic, 25B, 4:1 246200 • CHAMBER, solvent, 4:1 335379 • KIT, hydraulic service, 25B, 4:1, Type U...
Page 83 25B 4:1 Plated Steel Hydraulic Section Parts To Upper Base (Section D1, Air Motor Parts) Figure 9-1 4:1 Hydraulic Section Parts 1044131-06 © 2024 Nordson Corporation...
Page 84: 4:1 Type F Hydraulic Section Parts
9-4 25B 4:1 Plated Steel Hydraulic Section Parts 4:1 Type F Hydraulic Section Parts See Figure 9-2. Item Part Description Quantity Note − 247535 PUMP, hydraulic, 25B, 4:1 246200 • CHAMBER, solvent, 4:1 335379 • KIT, hydraulic service, 25B, 4:1, Type U...
Page 85 25B 4:1 Plated Steel Hydraulic Section Parts To Upper Base (Section D1, Air Motor Parts) Figure 9-2 4:1 Hydraulic Section Parts 1044131-06 © 2024 Nordson Corporation...
Page 86: 4:1 Replacement Packing Glands
9-6 25B 4:1 Plated Steel Hydraulic Section Parts 4:1 Replacement Packing Glands Packing Glands and Hydraulic Service Kits for 4:1 25B Pump Packings Type A Type D Type F Type G Type U Upper Packing — — — 248049 (A) —...
Page 87: Siphon Ball Check Kit
945006 945006 945006 945006 0.050 in. NOTE: A. Gland includes external O-ring and back-up rings, items 2A and 2B. B. Install on end of air motor connecting rod. 25B Air Motor and Air Valve Parts. 1044131-06 © 2024 Nordson Corporation...
Page 88: Hydraulic Service Kit For Type G Packings
9-8 25B 4:1 Plated Steel Hydraulic Section Parts Hydraulic Service Kit for Type G Packings See Figure 9-1 and Figure 9-3 for part locations. Use this kit to rebuild Type G packings or convert other packing types to Type G.
Page 89: Options
WASHER, lock, split, #10, steel, nickel • • NUT, hex, machine, #10−32, brass NS: Not Shown UA: Unavailable for purchase through Nordson. Contact local distributor or local source. To Siphon Port Figure 9-4 Wall Mount/Siphon Accessory Kit 1044131-06 © 2024 Nordson Corporation...
Page 90: Adhesives, Sealants, And Lubricants
9-10 25B 4:1 Plated Steel Hydraulic Section Parts Adhesives, Sealants, and Lubricants Use these adhesives, sealants, and lubricants when repairing the hydraulic section. Refer to 25B 4:1 Hydraulic Section Repair, for applications. Part Description Quantity 1612251 LUBRICANT, O-ring, Parker (Parker O-Lube), 2 oz...
Page 92: 25B Pump Air Valve Parts
10-2 Drawings 25B Pump Air Valve Parts Nordson Customer Service: (800) 433-9319 323001 Air Valve 981107 Screw 984130 Nut 983140 Lock Washer 983120 Lock Washer 323017 Spacer 323016 Bracket 323020 Snapper 983040 Flat Washer 981203 Screw 323013 Gasket (Kit A)
Page 93: 25B 4:1 Hydraulic Section Parts
Drawings 10-3 25B 4:1 Hydraulic Section Parts Nordson Customer Service: (800) 433-9319 To Upper Base (Air Motor Parts) 941440 O-Ring (Kit A, B, D) 246205 Plunger 246203 Pressure Housing 246200 Solvent Chamber 246215 Upper 323052 Tie Rod Back-Up Washer 941440 O-Ring...
Page 95 Amherst, Ohio, USA Nordson Authorized Representative in the EU Person authorized to compile the relevant technical data. Contact: Operations Manager Industrial Coating Systems Nordson Deutschland GmbH Heinrich-Hertz-StraBe 42-44 D-40699 Erkrath Nordson Corporation • 555 Jackson St, Amherst, Ohio 44001. USA DOC13009-06...
Page 96 Industrial Coating Systems Amherst, Ohio, USA Nordson Authorized Representative in the UK Contact: Technical Support Engineer Nordson UK Ltd.; Unit 10 Longstone Road Heald Green; Manchester, M22 5LB. England Nordson Corporation • 555 Jackson St, Amherst, Ohio 44001. USA DOC13040-03...
Page 97 1. Fill the lubricator bowl with Nordson Vitalizer oil. NOTE: Use only Nordson Vitalizer oil or an oil recommended by your Nordson representative. Disregard any oil recommendations in the OEM instruction sheet shipped with the air lubricator.
Page 98 Issued 1/04 Original copyright date 1991. Nordson and the Nordson logo are registered trademarks of Nordson Corporation. Part 108152−01 E 2017 Nordson Corporation...
Page 99 Medium K, S Aliphatic Petroleum Naphthas High T, Q K, S Mild K, S Chlorinated Solvents Medium High K, S Note 1: Type U packings may swell slightly when exposed to aromatic hydrocarbon solvents. Part 108044G E 2003 Nordson Corporation...
Page 100 Use for solventborne applications. esters NOTE: Type K solvent is highly viscous. At room temperature, it is not appropriate for use in Model 25B or 64B pumps where the solvent must flow through a filler cup and small ID passage into the solvent chamber.
Page 101 4. Add the remaining distilled water to make one gallon, and mix for an additional 15 minutes. NOTE: The mixture may separate after prolonged shelf time. If it does, mix again before using. Part 108044G E 2003 Nordson Corporation...
Page 102 Pump Packing and Solvent Chamber Fluid Guide Issued 10/03 Original copyright date 1990. Nordson and the Nordson logo are registered trademarks of Nordson Corporation. Part 108044G E 2003 Nordson Corporation...
Page 103 25B 4:1 Plated Steel Pump Service Kits Refer to 25B Pump Manual 1044131 for complete service and parts information. For parts and technical support call (800) 433-9319. Air Motor Kits Air Valve Kits A - 106274 Seal Kit B - 106103 Seal Kit...

Nordson 25B Customer Product Manual

Table of Contents

Safety

Description

Installation

Operation and Maintenance

Section 5 Troubleshooting

Troubleshooting

25B Air Valve and Air Motor Repair

25B 4:1 Hydraulic Section Repair

25B Air Motor and Air Valve Parts

25B 4:1 Plated Steel Hydraulic Section Parts

Drawings

Quick Links

Chapters

Related Manuals for Nordson 25B

Summary of Contents for Nordson 25B

Table of Contents