Manual - LOCTITE Equipment
Contents
1. clogged The diaphragm stroke adjustment may be closed Adhesive may have set up in the valve body Increase air pressure to 70 psi 4 8 bars minimum Increase pressure Replace tip If closed open counterclockwise V turn Clean the valve body Fluid drools after the valve closes eventually stopping This is caused by air trapped in the outlet of the valve body or the product has entrapped air The air will expand after the valve closes causing product to extrude until the air reaches atmospheric pressure Purge the valve by dispensing a steady flow of adhesive until clear of air bubbles If a small tip is being used remove the tip while purging to obtain sufficient flow to carry the air down through the tip adapter Liquid drips at a steady rate after the valve closes A steady drip can be caused by excessive reservoir pressure If the stroke adjustment is turned out more than two full turns the closure spring tension will be reduced allowing normal reservoir pressure to force the diaphragm open If reservoir pressure and stroke adjustment are within limits a steady drip indicates failure of the diaphragm to close fully due to particle build up and wear Check reservoir pressure to ensure it is not above 70 psi 4 8 bar Check to be sure the stroke adjustment knob is less than two turns out Remove the valve body inspect sealing surfaces on the diaphragm and valve body Repla2. LOGTITE EQUIPMENT Operation Manual Loctite VA10 Micro Diaphragm Valve Part Number 1611449 10 13 Table of Contents Description Specifications Unpacking and Inspection Theory of Operation Typical System Setup Setup Instruction Troubleshooting Care and Maintenance Accessories and Spare Parts Exploded Diagram Parts List Warranty 10 Description The Loctite VA10 Micro Diaphragm Valve is a small normally closed dispense valve for dispensing low to medium viscosity adhesives Its miniature size allows for multiple valve stacking in minimal space and higher dispensing frequency A tamper resistance stroke control provides for high resolution stroke adjustment which results in consistent flow control and bubble free no drip dispensing The materials of construction ensure that the Loctite VA10 Micro Diaphragm Valve is compatible with most adhesive products Features Bubble free no drip dispensing Compact size and weight High resolution stroke adjustment Seal less design Fail safe air to open spring to close UHMW polyethylene diaphragm Fluid body material 316 stainless steel Fitting Barb 316 stainless steel Tamper resistance stroke control Specifications Size 2 5 8 length x 4 dia 66 5 mm x 19 mm Total weight approx 1 75 oz 50 g Fluid Body Type 316 stainless steel Air Cylinder Body Type 303 stainless steel Fluid inlet thread 10 32 Diaphragm UHMW polyethylen
3. RRED DIRECTLY OR INDIRECTLY IN CONNECTION WITH THE SALE OR USE OF OR OTHERWISE IN CONNECTION WITH THE PRODUCTS INCLUDING WITHOUT LIMITATION LOSS OF PROFITS AND SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES WHETHER CAUSED BY NEGLIGENCE FROM HENKEL OR OTHERWISE 10 LOCTITE Henkel Corporation Henkel Canada Corporation One Henkel Way 2225 Meadowpine Boulevard Rocky Hill CT 06067 3910 Mississauga Ontario L5N 7P2 Henkel Corporation Henkel Ltda Automotive Metals HQ Rua Karl Huller 136 Jd 32100 Stephenson Hwy Canhema 09941 410 Madison Heights MI 48071 Diadema SP Brazil Henkel Capital S A de C V Calzada de la Viga s n Fracc Los Laureles Loc Tulpetlac C P 55090 Ecatepac de Morelos Edo de M xico www loctite com and designate trademarks of Henkel Corporation or its affiliates registered in the U S and elsewhere Henkel Corporation 2009 All rights reserved Data in this operation manual is subject to change without notice Manual P N 8902600 Rev A Date 05 09 2012 Gente 11
4. amounts specify a 0 to 15 psi 0 to 1 0 bar precision regulator to control the reservoir pressure 3 Set the diaphragm stroke Start with no more than 1 2 turn open The dispense valves are shipped with the stroke adjustment set at 1 2 turn open 4 Set the valve control air pressure at a minimum of 70 psi 4 8 bar 5 Actuate the valve long enough to fill the valve start liquid flow and purge air from the dispensing tip If a small tip is used it may need to be removed from the valve during purging Then fill the tip hub with fluid and install on the tip adapter so it is free of air 6 Before setting the controller time adjust the valve stroke control and reservoir pressure to provide proper flow from the tip Excessive flow can cause bubbles Use only enough reservoir pressure to achieve the proper flow Avoid setups with tight stroke setting and high reservoir pressures 7 Test the dispensed amount with a nominal time setting If more or less fluid is required increase or decrease the open time or reservoir air pressure Questions regarding installation operation or safety should be addressed to Loctite Technical Information Department in Rocky Hill Connecticut Telephone 1 800 LOCTITE 1 800 562 8483 7 Troubleshooting Problem Possible Cause Correction No liquid flow If valve operating pressure is to low the valve will not open The reservoir pressure may not be high enough The dispense tip may be
5. ce worn parts Liquid flows out of the drain hole Fluid leaking out of the drain hole indicates a ruptured diaphragm Replace diaphragm in accordance with maintenance instructions 8 Care and Maintenance Loctite VA10 Micro Diaphragm Valve is designed to provide continuous dispensing service Dispense valves used in production need no special care Normally purging with appropriate flush material or solvent after use is sufficient for cleaning Some materials however may cause a buildup on the valve head and diaphragm which will require a periodic thorough cleaning by removing the valve fluid body To Remove Valve Fluid Body Hold the valve air cylinder section securely using the wrench flat Rotate the fluid body counterclockwise using another wrench If the diaphragm remains inside the fluid body it can be pulled out using a 4 40 screw The valve body can be cleaned with flushing solvent The diaphragm can also be cleaned but do not use sharp probes because nicks and scratches on the sealing surface may affect the diaphragms ability to seal Replacing the Diaphragm Diaphragm Assembly P 3 m Air Cylinder r Piston bA Piston lt Insert pin into end of piston Hold piston and thread diaphragm onto piston by hand CY J60 1 so Once diaphragm is installed thread fluid body onto the air cylinder Dispense Valves Flushing amp Cleaning Proce
6. dure If the dispensing system reservoir dispense valve etc will not be used for one or more weeks it is recommended that the feed line and dispense valve be flushed clean with the proper solvent This procedure will describe the process e Turn off the reservoir pressure and verify that pressure has been exhausted from the reservoir e Remove the reservoir lid and remove the adhesive container e Replace it with a container of Equipment Flushing Solvent item 12121 e Replace the reservoir lid and tighten all wing nuts so the lid is secure e Adjust the air pressure regulator to 5 psi e Place a beaker or similar container under the dispense valve e Press the footswitch or manually depress the trigger on the valve and allow the Equipment Flushing Solvent to flow into the container e Note this may take a few moments or minutes depending upon the viscosity of the adhesive in the feed line e While the solvent is flowing be sure to open and close the dispense valve in order to simulate an agitation effect e This agitation allows the dispense valve to open and close while the solvent is being forced around the ball and seat assembly e Continue this process of opening and closing the valve every 5 seconds for a total of two 2 minutes or until the solvent is clear e Once you are satisfied that all adhesive has been removed from the feed line and dispense valve shut off the air and remove the flushing solvent e Re ins
7. e Pneumatic pressure required 70 to 90 psi 4 8 to 6 2 bars Maximum fluid pressure 70 psi 4 8 bars Mounting Hole 8 32 Unpacking and Inspection Carefully unpack the Loctite VA10 Micro Diaphragm Valve and examine the items contained in the carton Inspect the unit for any damage that might have occurred in transit If such damage has occurred notify the carrier immediately Claims for damage must be made by the consignee to the carrier and should be reported to the manufacturer Items supplied Loctite VA10 Micro Diaphragm Valve includes Operating Manual Feed line 7 ft 2 m Teflon line tubing 1 4 6 35 mm O D Air line 7 ft 2 m Nylon tubing 5 32 4 mm Dispense Tip sample kit Stroke Control Adjustment Key Inlet fitting 10 32 Barb 316 stainless steel Theory of Operation The dispense valve is normally a closed fail safe adjustable opening diaphragm valve Input air pressure of 70 to 90 psi 4 8 to 6 2 bars forces the internal piston to move a pre adjusted distance normally 0 025 or less A connecting rod pulls open the diaphragm seal permitting the fluid to flow through the diaphragm chamber Relieving the input air pressure allows the piston return spring to close the diaphragm ensuring rapid fail safe shutoff of fluid flow The amount of fluid that flows through the valve is determined by 1 length of time the valve is open 2 fluid reservoir pressure 3 output dispensing tip s
8. ey PN 1638884 Valve Rebuild Kit PN 1638886 Valve Replacement Diaphragm 5 Pack PN 1693581 Feed line tubing 4 inch 6 4 mm O D black polyethylene lined 33 feet 10 m length item 97972 11 Exploded Diagram and Parts List L CYLINDER BODY ON gt LIST 13 WARRANTY Henkel expressly warrants that all products referred to in this Instruction Manual for Loctite VA10 Micro Diaphragm Valve Part Number 1611449 hereafter called Products shall be free from defects in materials and workmanship Liability for Henkel shall be limited as its option to replacing those Products which are shown to be defective in either materials or workmanship or to credit the purchaser the amount of the purchase price thereof plus freight and insurance charges paid therefor by the user The purchaser s sole and exclusive remedy for breach of warranty shall be such replacement or credit A claim of defect in materials or workmanship in any Products shall be allowed only when it is submitted in writing within one month after discovery of the defect or after the time the defect should reasonably have been discovered and in any event within 12 months after the delivery of the Products to the purchaser This warranty does not apply to perishable items such as indicate items fuses fil
9. ize 4 diaphragm stroke 5 fluid viscosity For small deposits of low viscosity fluid the diaphragm adjustment will be set at a short stroke but never less than 1 8 turn from closed The diaphragm stroke control adjustment is made by using the tamper resist stroke control key and turning counterclockwise to open To ensure consistent dispensing the fluid reservoir pressure and the timed pulse must be constant Reservoir air pressure is determined by the viscosity of the fluid and the amount of fluid to be dispensed The dispense valves can be operated in any position without affecting flow Vibration normally has no effect on performance The valves can be moved in and out of dispense positions at high cycle speeds such as a reciprocating device installed on a production line without affecting dispensing performance The unique design of the dispense valves provides extremely high cycle rates at unusually close operating tolerances Typical Setup M Constant Air CH Z H EN H m Control aa Air Line Material LL l ca Ea O Ol i A E n V Fluid Reservoir Feed Tube Fluid Inlet Fitting Needle Retainer Nut 6 Setup Instructions oS Connect the fluid reservoir feed line to valve fluid inlet fitting Connect control air from valve to a valve controller or pneumatic source used to con
10. tall the reservoir lid and adjust the pressure regulator to approx 70 of its maximum value e Press the footswitch or manually depress the trigger on the valve and allow air to continually flow out of the dispense valve e CAUTION the vapors from the flushing solvent will be emitted and should be directed into a paper towel or similar cloth If an exhaust hood or fume filtration system is available it should be used e Continue to dispense air for approx 1 minute or until all solvent has been removed from the feed lines e While the air is being forced thru the feed lines lightly tap the feed line leading from the reservoir to the dispense valve e Once you are confident that all of the remaining solvent has been purged from the feed line and valve the process is complete NOTE the operator must wear Safety glasses and proper gloves while this procedure is being performed 9 Accessories Spare Parts Optional Accessories and System Components sold separately Loctite Dual Channel Integrated Semi Automatic Control Dispenser PN 1390321 amp 1390322 Loctite Bond A Matic 3000 Reservoirs 0 to 15 psi PN 982720 982721 982726 Loctite Bond A Matic 3000 Reservoirs 0 to 100 psi PN 982723 982724 982727 Loctite Shot Miser Reservoirs 0 to 100 psi PN 98090 Loctite Digital Dispense Controller PN 97101 Recommended Spare Parts Accessories Valve mounting block amp screw PN 1638885 Tamper Resistant Stroke Control K
11. ters lights etc No such claim shall be allowed in respect of products which have been neglected or improperly stored transported handled installed connected operated used or maintained In the event of unauthorized modification of the Products including where products parts or attachments for use in connection with the Products are available from Henkel the use of products parts or attachments which are not manufactured by Henkel no claim shall be allowed No Products shall be returned to Henkel for any reason without prior written approval from Henkel Products shall be returned freight prepaid in accordance with instructions from Henkel NO WARRANTY IS EXTENDED TO ANY EQUIPMENT WHICH HAS BEEN ALTERED MISUSED NEGLECTED OR DAMAGED BY ACCIDENT EXCEPT FOR THE EXPRESS WARRANTY CONTAINED IN THIS SECTION HENKEL MAKES NO WARRANTY OF ANY KIND WHATSOEVER EXPRESS OR IMPLIED WITH RESPECT TO THE PRODUCTS ALL WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND OTHER WARRANTIES OF WHATEVER KIND INCLUDING AGAINST PATENT OR TRADEMARK INFRINGEMENT ARE HEREBY DISCLAIMED BY HENKEL AND WAIVED BY THE PURCHASER THIS SECTION SETS FORTH EXCLUSIVELY ALL OF LIABILITY FOR HENKEL TO THE PURCHASER IN CONTRACT IN TORT OR OTHERWISE IN THE EVENT OF DEFECTIVE PRODUCTS WITHOUT LIMITATION OF THE FOREGOING TO THE FULLEST EXTENT POSSIBLE UNDER APPLICABLE LAWS HENKEL EXPRESSLY DISCLAIMS ANY LIABILITY WHATSOEVER FOR ANY DAMAGES INCU
12. trol the ON time of the valve Connect an appropriate size dispense tip to the male luer and secure with retaining nut Use small diameter tips 20 to 25 gage for low viscosity fluids Use larger tips 14 to 20 gage for more viscous fluids With a valve controller set up and connected to the valve and a fluid reservoir connected as shown on page 5 load fluid reservoir per Reservoir Operating Manual instructions CAUTION Always treat a pressurized reservoir with respect and check air gauge to ensure pressure is at zero before opening To ensure that all pressure is bled off all Loctite reservoirs have a pressure relief valve that should be activated before opening the tank After filling check to be certain the reservoir is sealed NOTE Do not over tighten the diaphragm or open the stroke adjustment knob counterclockwise more than two full turns Turning out more than two full turns does not increase the flow capacity and will reduce the closure spring tension This situation could permit pressurized liquid to force open the diaphragm seal resulting in continuous liquid flow Before proceeding check the following 1 Insure all the connections are tight 2 Set the reservoir pressure For low viscosity fluids start with a pressure of approximately 5 psi 0 3 bar For higher viscosity start at 10 to 20 psi 0 7 to 1 4 bar increase or decrease as necessary If solvents or other watery fluids are to be dispensed in very small
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