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Pinch Valve Assembly
Customer Product Manual
Part 768670A
Issued 05/05
For parts and technical support, call your nearest
Finishing Customer Support Centre.
Find your nearest centre at www.nordson.com/directory
This document is available on the Internet at http://emanuals.nordson.com/finishing
NORDSON ITALY • MILAN • ITALY
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Summary of Contents for Nordson 768670A
- Page 1 Customer Product Manual Part 768670A Issued 05/05 For parts and technical support, call your nearest Finishing Customer Support Centre. Find your nearest centre at www.nordson.com/directory This document is available on the Internet at http://emanuals.nordson.com/finishing NORDSON ITALY • MILAN • ITALY...
- Page 2 20090 Pieve Emanuele Milano, Italy Notice This is a Nordson Corporation publication which is protected by copyright. Original copyright date 2005. 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
......Declaration Of Conformity ....... Part 768670A 2005 Nordson Corporation... - Page 4 Table of Contents Part 768670A 2005 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: Regulations And Approvals
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. All phases of equipment installation must comply with all federal, state, and local codes. -
Page 7: 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. Grounding WARNING: Operating faulty electrostatic equipment is hazardous and can cause electrocution, fire, or explosion. -
Page 8: Action In The Event Of A Malfunction
Disconnect and lock out electrical power. Close pneumatic shutoff valves and relieve pressures. Identify the reason for the malfunction and correct it before restarting the equipment. Disposal Dispose of equipment and materials used in operation and servicing according to local codes. Part 768670A 2005 Nordson Corporation... -
Page 9: Residual Risks
Risk of powder ingestion if care is not taken when cleaning the surge hopper. Operators should wear a safety mask and goggles at all times when cleaning the Pinch Valve Assembly. Part 768670A 2005 Nordson Corporation... -
Page 10: Description
(5) which forms a seal to the cyclone during operation. As an option, a vibrator can be fitted to the cone of the surge hopper to encourage powder to enter the pinch valves. Figure 1 Pinch Valve Assembly Part 768670A 2005 Nordson Corporation... -
Page 11: Installation
Ensure that the earth wire is connected to a suitable earthing point. Connect suitable power supply (220v) to optional electric vibrator. Pneumatic Ensure that air supply is at 6 Bar pressure. Connect pneumatic hoses to pinch valves. Part 768670A 2005 Nordson Corporation... -
Page 12: Setting Up
Therefore the lower edge of the cyclone may vary in height from a minimum of 1150mm to a maximum of 1200mm. Operation See Fig 2. Figure 2 Pinch Valve Assembly Operation. Part 768670A 2005 Nordson Corporation... -
Page 13: Raising And Lowering The Surge Hopper For Cleaning
These sequence settings are factory set, and should only be modified by Nordson personnel. Raising And Lowering The Surge Hopper For Cleaning See Fig 3 A raise / lower toggle switch is situated on the side of the surge hopper lifting mechanism. -
Page 14: Maintenance
2. See Fig 4.Using a 19mm wrench disconnect the pinch valve that you would like to replace the sleeve on by loosening the bolts (1). CAUTION: The top valve (2) is bigger than the bottom valve (3) Part 768670A 2005 Nordson Corporation... - Page 15 3. See Fig 4. Remove the pressure regulators and gauges (4) on the side of the pinch valve to avoid damage. 4. See Fig 5. Remove the roll pin (1) that retains the sleeve inside the pinch valve using long nosed pliers. Part 768670A 2005 Nordson Corporation...
- Page 16 Pinch Valve Assembly Figure 5 Removing the roll pin. 5. See Fig 6 and Fig 7. Rotate the sleeve 45 degrees anti--clockwise, when the four tabs are lined up with the slots the sleeve can be removed. Part 768670A 2005 Nordson Corporation...
- Page 17 Pinch Valve Assembly Figure 6 Lining up the four tabs. Part 768670A 2005 Nordson Corporation...
- Page 18 8. Rotate the sleeve 45 degrees to lock it in position. 9. Using long nosed pliers re--insert the roll pin. 10. Check conditions of seals and replace if damaged. 11. Re--assemble regulators and gauges to the pinch valve, and re--assemble to the surge hopper. Part 768670A 2005 Nordson Corporation...
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Page 19: 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 Possible Cause Corrective Action... -
Page 20: 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 21: Pinch Valves
Valve, pinch, flanged, 80mm 393398 Sleeve, inner pinch valve, 80mm 768543 Valve, pinch, flanged, 50mm 766251 Sleeve, flanged, inner pinch valve, 50mm NOTE A: Fitted inside the pinch valve so not specifically shown in Fig 3 Part 768670A 2005 Nordson Corporation... -
Page 22: Pneumatic Switch
Pinch Valve Assembly Pneumatic Switch See Fig 9 Figure 9 Pneumatic Switch Item Part Description Quantity Note 768170 Switch, lever, auto seal Lifting Mechanism Cylinder See Fig 10 Part 768670A 2005 Nordson Corporation... -
Page 23: Vibrator (Optional)
Pinch Valve Assembly Figure 10 Lifting mechanism cylinder Item Part Description Quantity Note 766347 Cylinder, pneumatic, 50 stroke Regulator, 1/8” NOTE A: Non Saleable item Vibrator (optional) See Fig 11 Part 768670A 2005 Nordson Corporation... -
Page 24: Specifications
Item Part Description Quantity Note 769057 Vibrator, 240v AC NOTE A: This item is optional. Specifications Weight 60 Kg Noise Lower than 70 dBa in normal operation Operating Conditions Operating area lighting Minimum 300 Lux Part 768670A 2005 Nordson Corporation... -
Page 25: Dimensions
Table 1 indicates the overall dimensions of the Pinch Valve Assembly. Table 1 General Dimensions General Dimensions (mm) Width 1300 Depth Height 1520 See Fig 12, and Fig 13 for individual dimensions of the Pinch Valve Assembly. Figure 12 Plan view Part 768670A 2005 Nordson Corporation... -
Page 26: Pneumatic Requirements
Pinch Valve Assembly Figure 13 Side View Pneumatic Requirements Main supply air pressure 6 Bar Flow rate 600 nL / min. Operating pressures of components Pinch valves : 2.5 Bar Surge hopper lifting mechanism : 4.5 bar Part 768670A 2005 Nordson Corporation... -
Page 27: Declaration Of Conformity
This product has been manufactured according to good engineering practice and conforms to the specified directives and standards described above. II 3D T 200C Date: 5th May 2005 Sergio Cocchi Technical Director Powder Group Europe Manual XX-XX Part 768670A 2005 Nordson Corporation...