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A20A Automatic Electric
Airless Spray Gun
Customer Product Manual
Part 108182-03
Issued 03/17
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.
FM
C
US
APPROVED
NORDSON CORPORATION • AMHERST, OHIO • USA
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Table of Contents
Related Manuals for Nordson A20A
Summary of Contents for Nordson A20A
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Page 1: Airless Spray Gun
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. APPROVED NORDSON CORPORATION • AMHERST, OHIO • USA... -
Page 2: Table Of Contents
..... . . Contact Us Notice This is a Nordson Corporation publication which is protected by copyright. Nordson Corporation welcomes requests for information, comments, and Original copyright date 1999. No part of this document may be inquiries about its products. -
Page 3: Safety
Regulations and Approvals Make sure all equipment is rated and approved for the environment in which it is used. Any approvals obtained for Nordson equipment will be voided if instructions for installation, operation, and service are not followed. Part 108182-03... -
Page 4: Personal Safety
A20A Automatic Electric Airless Spray Gun Personal Safety To prevent injury follow these instructions. Do not operate or service equipment unless you are qualified. Do not operate equipment unless safety guards, doors, or covers are intact and automatic interlocks are operating properly. Do not bypass or disarm any safety devices. -
Page 5: Fire Safety
A20A Automatic Electric Airless Spray Gun The National Spray Equipment Manufacturers Association has created a wallet card that you should carry when you are operating high-pressure spray equipment. These cards are supplied with your equipment. The following is the text of this card: WARNING: Any injury caused by high pressure liquid can be serious. -
Page 6: Halogenated Hydrocarbon Solvent Hazards
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. Halogenated Hydrocarbon Solvent Hazards Do not use halogenated hydrocarbon solvents in a pressurized system that contains aluminum components. -
Page 7: Safety Labels
A20A Automatic Electric Airless Spray Gun Safety Labels See Figure 1 for the location of the safety label on the applicator. The safety label is provided to help you operate and maintain your equipment safely. The label reads: WARNING: Do not open when an explosive gas atmosphere is present. -
Page 8: Description
A20A Automatic Electric Airless Spray Gun Description The A20A Electric Spray Gun is a fast cycle, airless automatic spray gun designed for use in high-speed container coating applications. The gun can be used with the Nordson iTrax System or the Flow Sentry System. -
Page 9: Specifications
A20A Automatic Electric Airless Spray Gun Specifications Dimensions and Weight Length: 124 mm (4.88 in.) Short Standard Short ATEX 168 mm (6.62 in.) Extended Standard Extended ATEX 8 in. Extended Width 75 mm (2.94 in.) Height 67 mm (2.62 in.) Weight: 1.13 kg (2.5 lbs) -
Page 10: Installation
Electrical Connections The gun can be connected to any 24 Vdc driver that supplies a minimum of 1.5 amps (such as a Nordson FET-1 or FET-2 timer). The solenoid housing has a -in. NPT female thread for connection to an electrical conduit. -
Page 11: Baseefa Special Conditions For Safe Use
Spray Monitor System Installation To use the A20A spray gun with the Nordson iTrax System or the Flow Sentry System, a CO-plate and pressure transducer must be installed in the gun. These devices allow the systems to detect an abnormal changes in spray pressure that could cause rejects. -
Page 12: Co-Plate Selection
A20A Automatic Electric Airless Spray Gun CO-Plate Selection Cross-reference your nozzle size with your spray pressure to find the CO-plate part number. Table 1 CO-Plate Selection Spray Pressures Nozzle 27 Bar 34 Bar 41 Bar 48 Bar 55 Bar 62 Bar... -
Page 13: Operation
WARNING: This equipment can be dangerous unless it is used in accordance with the rules laid down in the manual. The A20A gun operation is controlled by the timer or pattern controller and driver used to trigger the spray gun. Refer to controller and driver manuals for operation procedures. -
Page 14: Troubleshooting
A20A Automatic Electric Airless Spray Gun Troubleshooting WARNING: Allow only qualified personnel to perform the following tasks. Follow the safety instructions in this document and all other related documentation. Problem Possible Cause Corrective Action Gun fails to trigger Poor electrical connection Check the gun, driver, and timer electrical connections. -
Page 15: Repair
A20A Automatic Electric Airless Spray Gun Repair WARNING: Allow only qualified personnel to perform the following tasks. Follow the safety instructions in this document and all other related documentation. Ball and Seat Module Replacement WARNING: To prevent serious injury to personnel and damage to equipment, relieve system fluid pressure and disconnect and lock out system electrical power before repairing the spray gun. -
Page 16: Solenoid Coil Replacement
A20A Automatic Electric Airless Spray Gun Ball and Seat Module Replacement (contd) Figure 5 Ball and Seat Module Installation 1. Nozzle nut 4. Ball and seat module* 7. Body pins 2. Nozzle 5. O-ring* 8. Seat housing 3. Retaining nut 6. -
Page 17: Armature Replacement
A20A Automatic Electric Airless Spray Gun 5. Unscrew the jam nut or loosen the set screw (5 or 6). Unscrew the housing nut (3) and remove the solenoid housing from the solenoid sleeve (1). Discard the parts you removed. 6. Slide the new solenoid housing over the solenoid sleeve. -
Page 18: Nordson Corporation
A20A Automatic Electric Airless Spray Gun Armature Replacement (contd) 3. Remove the nozzle nut, nozzle, and ball and seat module. Refer to Ball and Seat Replacement in this section. NOTE: On guns with 8-in. extensions, you do not have to remove the extension assembly. -
Page 19: Parts
A20A Automatic Electric Airless Spray Gun Parts To order parts, call the Nordson Finishing Customer Support Center at (800) 433−9319 or your local Nordson representative. Use these parts lists and illustrations to locate and describe parts correctly. Gun Models Refer to the indicated pages for the model parts lists. -
Page 20: Standard Short And Extended A20A Spray Guns
A20A Automatic Electric Airless Spray Gun Standard Short and Extended A20A Spray Guns See Figure 8. This parts list covers the standard short and extended models. The only difference between the short and extended models is the length of the gun body and the armature. -
Page 21: Nordson Corporation
A20A Automatic Electric Airless Spray Gun Standard Short Standard Extended Figure 8 Standard Short and Extended A20A Spray Guns Part 108182-03 E 2017 Nordson Corporation... -
Page 22: Ce/Atex Short And Extended A20A Spray Guns
A20A Automatic Electric Airless Spray Gun CE/ATEX Short and Extended A20A Spray Guns See Figure 9. This parts list covers the CE/ATEX short and extended models. The only difference between the short and extended models is the length of the gun body and the armature. -
Page 23: Nordson Corporation
C: Included in Buna-N soft goods service kit. To replace with EPR O-rings refer to EPR Soft Goods Kit on page 25. D: Included in standard and extended armature service kit. E: Use for mounting gun. NS: Not Shown Figure 9 CE/ATEX Short and Extended A20A Spray Guns Part 108182-03 E 2017 Nordson Corporation... -
Page 24: 8-Inch Extended Standard A20A Spray Gun
A20A Automatic Electric Airless Spray Gun 8-Inch Extended Standard A20A Spray Gun See Figure 10. Item Part Description Quantity Note − 144466 GUN, A20A extended, 8-inch 984171 S NUT, hex, jam, −20, steel, zinc 247641 S RETAINER, CO-Plate 945020 S O-RING, hotpaint, in. - Page 25 A20A Automatic Electric Airless Spray Gun MODEL A20A US PATENT NO 5,078,325 OTHER PAT.PEND NORDSON CORP MFG. Figure 10 8-Inch Extended Standard A20A Spray Gun Part 108182-03 E 2017 Nordson Corporation...
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Page 26: Service Kits
A20A Automatic Electric Airless Spray Gun Service Kits See Figures 8, 9, and 10 for item numbers. Ball and Seat Kit Use for all models. See Figures 8, 9, and 10. Item Part Description Quantity − 135557 SERVICE KIT, ball and seat - - - - - - S MODULE, ball &... -
Page 27: Armature Kits
A20A Automatic Electric Airless Spray Gun Armature Kits See kit description for usage. All armature kits have the same parts except for the armature. See Figures 8, 9, and 10. Item Part Description Quantity − 135560 SERVICE KIT, standard armature (standard, CE/ATEX) −... -
Page 28: Nordson Corporation
A20A Automatic Electric Airless Spray Gun Part 108182-03 E 2017 Nordson Corporation... - Page 29 II 2 G Ex db IIB T3 Gb (Ta -20°C to + 60°C) DNV ISO9001 Date: 01March2017 Hallie Smith - Petee Engineering Manager Industrial Coating Systems Amherst, Ohio, USA Nordson Authorized Representative in the EU Contact: Operations Manager Industrial Coating Systems Nordson Deutschland GmbH Heinrich-Hertz-StraBe 42-44 D-40699 Erkrath...
- Page 30 A20A Spray Gun Refer to the A20A Spray Gun manual 108182 for complete service and parts information. Refer to the A20A Spray Gun manual 108182 for complete service and parts information. For parts and technical support call (800) 433-9319. For parts and technical support call (800) 433-9319.