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25B
Nordson 25B Customer Product Manual
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© 2024 Nordson Corporation
1044131-06
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
1
900481
ADHESIVE, pipe/thread/hydraulic sealant (Loctite High T
emp SS567)
1
89
91
Table of Contents
Table of Contents
3
Default Chapter
9
Safety
9
Specifications
9
Dimensions and Weight
9
Air and Fluid Specifications
10
Connections
10
Operating Sound Levels
10
Air Motor Service Kits
11
Hydraulic Section Service Kits
11
Packing Glands and Kits
11
Pump and Subassemblies
11
Service Kits
11
Adhesives, Sealants, and Lubricants
12
Recommended Spare Parts
12
Solvent Chamber Fluid
12
Options
13
Safety
15
Introduction
15
Qualified Personnel
15
Intended Use
15
Regulations and Approvals
15
Personal Safety
16
High-Pressure Fluids
17
Fire Safety
18
Halogenated Hydrocarbon Solvent Hazards
18
Action in the Event of a Malfunction
19
Disposal
19
Safety Labels
20
Description
23
Introduction
23
Pump Versions
23
Packings
23
Pump Operation
23
Suction Stroke
23
Plunger Lubrication
24
Pressure Stroke
24
Dead-End and Circulating System Operation
26
Options
26
Installation
27
Mounting and Connections
27
Mounting
27
Grounding
28
High Pressure Port
28
Siphon and High Pressure Fluid Connections
28
Compressed Air Connection
30
Installation Guidelines
31
Installation Guidelines (Con't)
33
Operation and Maintenance
35
Introduction
35
System Check
35
Solvent Chamber Fill
36
Flushing
36
Cleaning Solution for Flushing
36
Frequency
36
System Flushing
37
Routine Startup
39
Preparation
39
Startup
39
Routine Shutdown
40
Maintenance
41
Daily
41
Weekly
41
As Needed
42
Every Four to Six Months
42
Section 5 Troubleshooting
43
Troubleshooting
43
Common Problems
44
Problem
44
Pump Fails to Start or Stops While Operating and Fails to Restart
44
Excessive or Constant Air Leakage from Air Motor or Air Valve
45
Pump Strokes Irregularly When Spray Device Is Triggered
46
Pump Operates but Flow Is Restricted, or Pump Surges
46
Pump Fails to Siphon Coating Material
47
Pump Continues to Operate Even after Drain and Circulation Valves
47
Spray Pattern Has Tails of Unatomized Coating Material at the Outer Edges
48
Air Exhaust
49
Air Supply
49
Cavitation
49
Correcting Siphon Problems
49
Minimizing Pressure Deviations
49
Preventing Air Valve and Muffler Freezing
50
Priming Problems
50
25B Air Valve and Air Motor Repair
51
Introduction
51
Air Valve Removal
51
Air Valve Repair
51
Tools and Materials Required
51
Air Valve Disassembly
52
Snapper Rebuild
53
Air Valve Assembly
54
Air Motor Repair
55
Air Valve Installation
55
Preparation
55
Tools and Materials Required
55
Air Motor Disassembly
56
Separating the Air Motor and Hydraulic Section
56
Air Motor Disassembly (Con't)
57
Piston Disassembly
58
Piston Repair
58
Air Motor Assembly
59
Piston Assembly
59
Connecting the Air Motor and Hydraulic Section
60
Returning the Pump to Service
60
25B 4:1 Hydraulic Section Repair
61
Introduction
61
Dismounting the Pump
61
Preparation
61
Tools and Materials Required
61
Separating the Air Motor and Hydraulic Section
62
Disassembly
63
Disassembly (Con't)
64
Cleaning, Inspection, and Parts Replacement
65
Ball Check Test
65
Packing Gland Replacement
65
Type G Packing Gland Rebuild
66
Assembly
67
Assembly (Con't)
68
Connecting the Air Motor and Hydraulic Section
68
Returning the Pump to Service
69
25B Air Motor and Air Valve Parts
71
Parts
71
Using the Illustrated Parts List
71
Air Motor Parts
72
Air Valve Parts
74
Mufflers and Covers
76
Air Motor and Air Valve Service Kits
77
Air Motor Seal Kit
77
Air Valve Seal Kit
77
Muffler Kit
77
Air Motor Accessory Group
78
Air Valve Crankshaft and Arm Kit
78
Options
78
Adhesives, Sealants, and Lubricants
79
25B 4:1 Plated Steel Hydraulic Section Parts
81
Parts
81
Using the Illustrated Parts List
81
4:1 Type F Hydraulic Section Parts
84
4:1 Replacement Packing Glands
86
Packing Gland Materials and Applications
86
4:1 Type F Hydraulic Section Parts
86
Pressure Ball Check Kit
86
Hydraulic Service Kits for Type A, D, F, and U Packings
87
Siphon Ball Check Kit
87
Hydraulic Service Kit for Type G Packings
88
Options
89
Wall Mounting/Siphon Accessory Kit
89
Adhesives, Sealants, and Lubricants
90
Drawings
91
25B Pump Air Valve Parts
92
25B 4:1 Hydraulic Section Parts
93
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Nordson 25B Specifications
General
Brand
Nordson
Model
25B
Category
Water Pump
Language
English
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