Nordson AN-8 Plus Customer Product Manual

Electrostatic air spray gun

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Model AN-8 Plus Manual

Electrostatic Air Spray Gun

Customer Product Manual

Part 107 962H

NORDSON CORPORATION

AMHERST, OHIO

USA

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Summary of Contents for Nordson AN-8 Plus

Page 1 Model AN-8 Plus Manual Electrostatic Air Spray Gun Customer Product Manual Part 107 962H NORDSON CORPORATION AMHERST, OHIO...
Page 2 Amherst, OH 44001 Notice This is a Nordson Corporation publication which is protected by copyright. Original copyright date 1991. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Nordson Corporation. The information contained in this publication is subject to change without notice.
Page 3: Table Of Contents
....Installing the Cable to the AN-8 Plus Gun ....
Page 5 ........AN-8 Plus Electrostatic Cables .
Page 9: Introduction
They are familiar with all relevant safety rules and regulations and are physically capable of performing their assigned tasks. Use of Nordson equipment in ways other than those described in the 3. Intended Use documentation supplied with the equipment may result in injury to persons or damage to property.
Page 10: Personal Safety
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. S1EN−03−[SF−LECAP]−7 E 1998 Nordson Corporation All rights reserved Issued 10/98...
Page 11: High-Pressure Fluids
The treatment that doctors recommend for an injection injury to the hand includes immediate decompression of the closed vascular compartments of the hand to release the underlying tissue distended by the injected paint, judicious wound depravement, and immediate antibiotic treatment. S1EN−03−[SF−LECAP]−7 E 1998 Nordson Corporation All rights reserved Issued 10/98...
Page 12: Fire Safety
Clean, maintain, test, and repair equipment according to the instructions in your equipment documentation. Use only replacement parts that are designed for use with original equipment. Contact your Nordson representative for parts information and advice. S1EN−03−[SF−LECAP]−7 E 1998 Nordson Corporation...
Page 13: Halogenated Hydrocarbon Solvent Hazards
Check your material MSDS 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. If a system or any equipment in a system malfunctions, shut off the 7.
Page 15: Safety Labels
The nozzle MUST BE REMOVED for cleaning. Use a non-flammable solvent in a non-conductive container, i.e. glass container. Continued on next page 107 962H Manual 21-19 E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 16 Description 9. NEVER use or store flammable solvents in the spray area. 10. Make no modification to this electrostatic equipment or its fluid feed system without written permission from Nordson Corporation, 555 Jackson Street, Amherst, OH, 44001, U.S.A. 11. When providing an air supply to an electrostatic waterborne hand spray gun, the air hose must be electrically conductive in nature.
Page 19: Introduction
Nordson model EPS8 electrostatic power supply, which is equipped with an electro-pneumatic flow switch. The AN-8 Plus gun is light weight and well balanced. You can adjust the horn air pressure and fluid flow rate of the AN-8 Plus gun, and easily disassemble the gun for cleaning and repair.
Page 20: Options
Refer to the Parts section for ordering information for the Isocoil. You can also convert the AN-8 Plus gun for use with waterborne materials. Refer to AN-8 Plus Waterborne Conversion Kit instructions for conversion data.
Page 21: Typical Heated Circulating System
Description Figure 2-2 illustrates the AN-8 Plus gun in a typical heated, circulating 3. Typical Heated system. Circulating System 2119003A Fig. 2-2 AN-8 Plus Gun in a Typical Heated, Circulating System 1. Electrostatic cable 7. Fluid filter 13. Air pressure regulator 2.
Page 22: Theory Of Operation
Description To charge the coating particles as they leave the gun, the AN-8 Plus 4. Theory of Operation gun (2) uses a high-voltage electrostatic charge, generated in the EPS8 electrostatic power supply (12) and conducted to the gun through the electrostatic cable (1).
Page 25: Introduction
The AN-8 Plus gun operates at any reasonable working distance. If you wish to use the AN-8 Plus gun to spray waterborne coating materials, convert the gun as described in Converting the Gun for Waterborne Coatings.
Page 26: Installing The Cable To The An-8 Plus Gun
A resistor, insulating tube, and dielectric grease are factory-installed in the AN-8 Plus gun. To install a replacement resistor kit and cable to a previously installed AN-8 Plus gun, refer to Replacing the Extension Resistor Kit and Cable in the Repair section.
Page 27 Refer to the Electrostatic Cable Care and Installation manual for instructions on maintaining the cable and power supply well. 6. Operate the AN-8 Plus gun only from a primary voltage source with a grounded conductor connected to a true earth ground. Make a second ground connection at the external ground terminal on the power supply chassis.
Page 28: Installing The Gun
2. Install the fluid tip (3) over the tip resistor, and then thread it into the end of the gun extension. 3. Tighten the fluid tip with the Nordson wrench until it is snug. Do not overtighten the fluid tip.
Page 29: Installing The Air Flow Switch, Hoses, And Fittings
WARNING: Using fittings other than those recommended can void the AN-8 Plus gun’s Factory Mutual (FM) certification and create a spark or ignition hazard. CAUTION: Dirty, moist air can reduce the efficiency of the gun and can cause equipment damage.
Page 30: Securing The Hoses And Gun
2. Ground all metal fittings to a suitable earth ground and keep them as far away from the AN-8 Plus gun as possible. Manual 21-19 107 962H E 1999 Nordson Corporation...
Page 31: Checking The Gun After Installation
6. Converting the Gun for consult your Nordson Corporation representative to order the conversion Waterborne Coatings kit. When installing the waterborne conversion kit, refer to the AN-8 Plus Air Spray Gun Solvent-Based to Waterborne Conversion Kit instruction sheet for additional information.
Page 32: Installing A New Extension Resistor Kit And Cable
The resistor service kit includes dielectric grease. If you are performing an initial installation of the AN-8 Plus gun, refer to Installing the Electrostatic Cable in this section. If you are installing a new cable or a new resistor service kit into a previously installed AN-8 Plus gun, refer to Replacing the Resistor Service Kit and Cable in the Repair section of this manual.
Page 33 Installation 2119006A Fig. 3-3 Optional AN-8 Plus Isocoil 1. Gun extension 5. Isocoil swivel fitting 2. Gun handle 6. Fluid tube 3. Fluid port—gun handle 7. Fluid inlet port—gun extension 4. Isocoil fluid tube 107 962H Manual 21-19 E 1999 Nordson Corporation...
Page 37: Daily
WARNING: This equipment can be dangerous unless it is used 1. Daily in accordance with the rules laid down in this manual. The following steps describe daily operation of your AN-8 Plus gun. 1. Turn on the air supply. 2. Turn on the EPS8 electrostatic power supply.
Page 38 (no workpiece in front of gun), and with the gun electrode shorted to ground (dead short). 10. Use a Nordson kV meter to read the maximum kV output of the power supply. Use this information, and the resistance values given in the Electrostatic System Checks manual, as a baseline when troubleshooting the electrostatic system.
Page 41: Introduction
The electrostatic cable is the high-voltage link between the power supply and the AN-8 Plus gun. Because the cable conducts high voltage, it is subject to electrical breakdown (burn-through or carbon tracking) if it is not correctly maintained.
Page 42: Gun Maintenance
To prevent coating materials from collecting on the gun extension, you can wrap the extension in the Nordson AN-8 Plus gun cover, or in a protective, non-conductive cloth or plastic and then secure it with non-conductive tape or rubber bands.
Page 45: Introduction
This section contains troubleshooting procedures. These procedures 1. Introduction 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. Mechanical Problems Problem Page...
Page 46: Mechanical Problems
Fluid leaking near Damaged packing cartridge gasket or Disassemble the gun and inspect the trigger shaft seal parts for damage or wear. Replace parts if required. Manual 21-19 107 962H E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 47: Electrostatic Problems
2. Check the electrostatic cable to microamp readings between the gun and power supply using a Nordson kV meter (follow the instructions provided with the meter). Defective electrostatic cable Replace the electrostatic cable. Power supply problem Refer to the Troubleshooting section in your power supply manual.
Page 51: Introduction
Do not disassemble the gun any further. b. Work through the cable adapter at the end of the gun. 107 962H Manual 21-19 E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 52 7. Tighten the cable connecting nut. 2119008A Fig. 7-1 Applying the Dielectric Grease to the AN-8 Plus Gun 1. Dielectric grease 4. Insulating tube 2. Syringe 5. Resistor and spring 3.
Page 53: Disassembling The Gun
2. Unscrew the retaining ring (3) and remove the air cap (1) from the gun extension. 3. Use the Nordson wrench to remove the fluid tip (2) from the gun extension. 4. Remove the tip resistor (35). 5. Remove the two pivot screws (11) that secure the trigger (25) to the gun handle, and then remove the trigger.
Page 54: Internal Parts
1. Unscrew the trigger puller (12) from the threaded end of the packing cartridge/needle assembly (32). 2. Use the Nordson wrench shipped with your gun to unscrew and remove the seal retainer (8) from the gun extension. 3. Remove the spacer (7), gasket (6), and packing cartridge/needle assembly from the gun extension.
Page 55 Repair 2119009A Fig. 7-2 AN-8 Plus Gun Parts 1. Air cap (typical) 13. Compression spring 25. Trigger 2. Fluid tip (typical) 14. Retainer gasket 26. Nut 3. Retaining ring 15. Air valve plug 27. Washer 4. Insulating tube 16. Spring 28.
Page 56 6. Spring 2. Air valve needle 7. Trigger stop needle 3. Air adjustment knob 8. Retaining ring 4. Gun handle 9. Set screw 5. Trigger stop knob Manual 21-19 107 962H E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 57: Replacing The Extension Resistor Service Kit And Cable
Install the resistor end (6) of the insulating tube into the high-voltage bore of the extension. (The end of the insulating tube containing the dielectric grease should go into the bore last.) 4. Assemble the AN-8 Plus gun. Refer to Assembling the Gun in this section. 107 962H...
Page 58: Replacing The Resistor Only
(The end of the insulating tube containing the dielectric grease (3) should go into the bore last.) 5. Assemble the gun. Refer to Assembling the AN-8 Plus Gun in this section. 6. Install the electrostatic cable on the gun.
Page 59: Replacing Parts And Cleaning The Gun
2. Inspect all the gun parts, especially seals, gaskets, and O-rings, for signs of wear or damage, and replace parts as required. 3. Clean the AN-8 Plus gun and replace the O-rings as follows. a. Lubricate all new O-rings with O-ring lubricant before installing them into the gun.
Page 60: Assembling The Gun
After you replace any parts and perform the cleaning procedures for the 7. Assembling the Gun AN-8 Plus gun, use this procedure to complete the assembly of the gun. Internal Parts 1. See Figure 7-2. Install the needle (33) on the replacement packing cartridge (32).
Page 61: External Parts
3. See Figure 7-2. Install the fluid tip (2) on the gun using the Nordson wrench. Tighten the fluid tip hand-tight, and then tighten further with −...
Page 62: Final Assembly And Adjustments
If the adjustment is correct, go to step 2. If re-adjustment is necessary, remove the pivot screws (11) and trigger (25), and then repeat steps a−c. Manual 21-19 107 962H E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 63 6. With the electrostatic power supply turned off, test the spray for correct operation and for leaks. If necessary, correct any leaks. 7. Turn all power on and return the system to operation. 107 962H Manual 21-19 E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 67: Using The Illustrated Parts List
Parts Section 8 Parts To order parts, call the Nordson Customer Service Center or your local 1. Introduction Nordson representative. Use this five-column parts list, and the accompanying illustration, to describe and locate parts correctly. Using the Illustrated Parts Numbers in the Item column correspond to numbers that identify parts in illustrations following each parts list.
Page 68: Gun Assembly
2. Gun Assembly Item Part Description Quantity Note — 111 048 Gun, electrostatic air spray, manual, AN-8 Plus 244 971 S Ring, retaining 249 038 S Resistor, tip with holder - - - - - - S Extension, head 935 025 S Resistor, without leads, 1.5 W, 7.5 kV...
Page 69 901 905 S Brush 901 907 S Brush, bristle, nylon 227 583 S Bag, cover, AN-8 Plus 247 658 Applicator, dielectric grease, 10 cc, carton of 12 - - - - - - Cap, air - - - - - -...
Page 71: Recommended Spare Parts
Service kit, air valve seat 227 583 Bag, cover, AN-8 Plus 227 584 Bag, cover, AN-8 Plus NS: Not Shown Use the following lists to order service kits for the AN-8 Plus gun. 4. Service Kits Resistor Service Kit See Figure 8-1. Item Part...
Page 72: Air Valve Service Kit
- - - - - - S Adjuster, trigger stop - - - - - - S Needle, stop 900 439 S Adhesive, threadlocking NS: Not Shown Manual 21-19 107 962H E 1999 Nordson Corporation All rights reserved Issued 11/99...
Page 73: Handle Replacement Kit
Service kit, handle replacement 940 140 S O-ring, hotpaint, 0.500 x 0.625 x 0.063 in. - - - - - - S Handle, gun, AN-8 Plus 940 080 S O-ring, hotpaint, 0.188 x 0.313 x 0.063 in. 940 080 S O-ring, hotpaint, 0.188 x 0.313 x 0.063 in.
Page 74: Extension Service Kit
Quantity Note — 111 050 Service kit, extension - - - - - - Extension, AN-8 Plus - - - - - - Needle and seat, A7A - - - - - - Conductor, pin NS: Not Shown AN-8 Plus Electrostatic See Figure 8-1.
Page 75: Optional Isocoils
Only use Nordson Corporation parts. The AN-8 Plus gun can use 5. Optional Isocoils several optional parts. AN-8 Plus Miniature Isocoils See Figure 8-2. The AN-8 Plus gun can use either of two miniature Isocoils listed below. Item Part Description...
Page 76: High-Conductivity Isocoil
S Insert, tube 984 546 S Nut, pipe, 0.380 in., NPS 246 632 S Adapter, Isocoil, 0.380 in., NPS 133 679 S Bracket, Isocoil, AN-8 Plus 2119015A Fig. 8-3 High Conductivity Isocoil Manual 21-19 107 962H E 1999 Nordson Corporation...
Page 79: Introduction
Specifications Section 9 Specifications This section provides the specifications for the AN-8 Plus gun. 1. Introduction Dimensions Size Metric (cm) USA (in.) Height: 24.1 Length: 26.4 10.4 Width: Operating Pressures Pressure Metric (bar) USA (psi) Air: Maximum working pressure Optimum pressure (at gun) 1.4−2.1...
Page 80: Air Quality
Resistance Values Power unit cable end to gun electrode: 230−250 MΩ Cable, end-to-end: 180−270 MΩ Gun resistor: 88 MΩ ± 10% Tip resistor: 12 MΩ ± 10% Manual 21-19 107 962H E 1999 Nordson Corporation All rights reserved Issued 11/99...

Nordson AN-8 Plus Customer Product Manual

Manual

Section 9

Specifications

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