Related Manuals for Nordson A7AA
Summary of Contents for Nordson A7AA
- Page 1 Model A7AA Air Assisted Airless Gun Customer Product Manual Part 108 046C OBSOLETE NORDSON CORPORATION AMHERST, OHIO...
- Page 2 Amherst, OH 44001 Notice This is a Nordson Corporation publication which is protected by copyright. Original copyright date 1990. 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.
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Page 3: Table Of Contents
......A7AA Airless Gun ........ - Page 4 ..........E 2000 Nordson Corporation...
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Page 5: 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. -
Page 6: Personal Safety
Model A7AA Air Assisted Airless 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 7: High-Pressure Fluids
Model A7AA Air Assisted Airless Gun High-Pressure Fluids High-pressure fluids, unless they are safely contained, are extremely hazardous. Always relieve fluid pressure before adjusting or servicing high pressure equipment. A jet of high-pressure fluid can cut like a knife and cause serious bodily injury, amputation, or death. Fluids penetrating the skin can also cause toxic poisoning. -
Page 8: Fire Safety
Model A7AA Air Assisted Airless Gun Fire Safety To avoid a fire or explosion, follow these instructions. Ground all conductive equipment in the spray area. Use only grounded air and fluid hoses. Check equipment and workpiece grounding devices regularly. Resistance to ground must not exceed one megohm. -
Page 9: 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... -
Page 10: Description
It is also suitable for use in heated systems up to 92 _C (200 _F) or ambient fluid systems. Due to its fast trigger cycle capability, the A7AA may be used for ultra high speed applications as well as common product finishing. Its simple design and rugged construction provide for long service life and easy field maintenance. -
Page 11: Theory Of Operation
Model A7AA Air Assisted Airless Gun Theory of Operation In normal operation, the air is turned on just before fluid exits the nozzle and is turned off just after the fluid stops flowing. This overlap is designed to eliminate gun spitting. -
Page 12: Installation
See Figure 3. 3. Installation NOTE: The A7AA can be mounted to a 12.7 mm (0.5 in.) round bar. The gun or the mounting bar should be mounted in such a way as to allow for easy removal for service. Slide the mounting bar through the mounting hole on the gun body (1), then tighten the square-head screw (2). - Page 13 Model A7AA Air Assisted Airless Gun 0420003A Fig. 3 Installation of A7AA Guns 1. Gun body 3. Street elbow 4. Fluid fittings 2. Square head screw E 2000 Nordson Corporation 108 046C Manual 4-20 All rights reserved Issued 1/00...
- Page 14 Model A7AA Air Assisted Airless Gun The A7AA gun is normally used as part of a larger spraying system. A 3. Installation (contd) typical installation is show in Figure 4. MAIN AIR ASSIST AIR 0420004A Fig. 4 Typical A7AA Installation 1.
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Page 15: Quick-Exhaust Valve
Model A7AA Air Assisted Airless Gun Quick-Exhaust Valve For high speed gun triggering (stitching) or for actuating the A7AA over long distances, use an optional quick-exhaust valve. Refer to the Options section for ordering information. The A7AA gun may also be installed so that several guns can be fired by the same solenoid. -
Page 16: Operation
1. Check the air lines and the material supply hose for leaks, kinks or damage. Replace lines and hoses when necessary. 2. Make sure the A7AA gun is mounted securely. 3. Make sure the air supply filters are clean and dry. -
Page 17: Troubleshooting
If you cannot solve the problem with the information given here, contact your local Nordson representative for help. Troubleshooting Chart The following table lists possible A7AA malfunctions. Problem Possible Cause Corrective Action... -
Page 18: Repair
Model A7AA Air Assisted Airless Gun WARNING: Allow only qualified personnel to perform the 7. Repair following tasks. Follow the safety instructions in this document and all other related documentation. The repair section consists of disassembly and assembly of the gun. -
Page 19: Parts
Model A7AA Air Assisted Airless Gun To order parts, call the Nordson Customer Service Center or your local 8. Parts 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 20: A7Aa Airless Gun
Model A7AA Air Assisted Airless Gun A7AA Airless Gun See Figure 6. Item Part Description Quantity Note — 103 754 Gun, A7AA, stainless steel, pounds S Screw, oval, 10-32 x 1.000, slotted, zinc 981 138 S Cover, air cylinder 103 735 S Spring, compression, 1.240 x 1.093 OD x 0.094 in. - Page 21 Model A7AA Air Assisted Airless Gun 0420007A Fig. 6 A7AA Airless Gun E 2000 Nordson Corporation 108 046C Manual 4-20 All rights reserved Issued 1/00...
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Page 22: Seal Service Kit
S O-ring, Hotpaint, 0.250 x 0.375 x 0.063 in. 940 100 Recommended Spare Parts The following lists the recommended spare parts. Refer to the Options section or contact your Nordson representative for a complete list of nozzles available. Part Description... -
Page 23: Options
Options include nozzles, air cap and equipment. 9. Options Nozzles and Air Cap For a complete list of nozzles, refer to the Nordson Airless Nozzle Catalog. Nozzles can also be made to customer specifications. Contact your Nordson representative for more information. -
Page 24: Equipment
Model A7AA Air Assisted Airless Gun Equipment The following table lists optional equipment. Part Description 161 340 Fluid filter 110 911 Fluid filter, stainless steel 244 777 Circulation valve 244 778 Circulation valve, stainless steel 094 000 Nozzle broach, 0.003 in. -
Page 25: Specifications
Model A7AA Air Assisted Airless Gun Specifications for the A7AA gun are listed below. 10. Specifications Dimensions See Figure 7. 7.62 cm. (3 in.) 14.73 cm. (5.8 in.) 10.16 cm. (4 in.) 0420008A Fig. 7 System Dimensions E 2000 Nordson Corporation... -
Page 26: Weight
Model A7AA Air Assisted Airless Gun Weight 1400 grams (3.09 lbs) Pressures Air pressures are listed below. Minimum Maximum Trigger 276 kpa (40 psi) 758 kpa (110 psi) Assist 758 kpa (110 psi) Fluid 1034 kpa (1500 psi) E 2000 Nordson Corporation...
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