User manual EFD 741V INSTALLATION GUIDE

[. . . ] ® A NORDSON COMPANY 741V Series Dispense Valve INSTALLATION GUIDE Electronic pdf files of EFD® manuals are also available at www. efd-inc. com/manuals. html. USA: 800-556-3484 or +1-401-434-1680 Europe: 0800 585733 or +44 (0) 1582 666334 Asia: +86 (21) 5854 2345 technical@efd-inc. com www. efd-inc. com Introduction The 741V Series dispense valve is simple to use and will operate many millions of cycles without maintenance. The 741V Series valves are designed to apply low-viscosity fluids with accurate, extremely close repeat deposit control. The 741V and 741V-SS valves are ideal for use on automatic assembly machines. [. . . ] Fill reservoir by pouring fluid directly into tank liner or manufacturer's bottle placed inside reservoir. Set reservoir pressure to low for thin fluids and higher for thick fluids. Set the needle stroke, starting at one full turn open. Set valve control air pressure at 70 psi (4. 8 bar). Refer to valve controller operating manual. Open the valve with an air pulse long enough to fill the valve and start fluid flow. Test the dispensed amount with a nominal time setting. RUN SETUP CYCLE ® A NORDSON COMPANY Run Purge Program VALVEMATE 7000 Setup Fast Slow Time Set Pressure Time STOP 4 5 5. 6 6. 7. 9. 8 Open Close 9 10 10. 11 Set desired deposit size by adjusting reservoir pressure, needle stroke and valve open time. How the Valve Operates Input air pressure at 70 psi (4. 8 bar) retracts the needle from the needle seat , permitting fluid flow from the output tip adapter . Piston and needle stroke and fluid flow are controlled by the stroke control knob. Once the cycle is complete, air is exhausted back through the valve controller, ensuring rapid and positive fluid shutoff. The 741V Series can be operated in any position without affecting flow. The amount of fluid dispensed will depend on the time the valve is open, fluid reservoir pressure, dispensing tip size, needle stroke and fluid viscosity. To calibrate or document the dispensing process, use the stroke control reference. To calibrate, turn the calibrating adjustment (located in the end of the stroke adjustment knob) out two full turns. Close the stroke adjustment knob fully until it bottoms against the air cylinder body. Turn the adjustment until it stops, calibrating the valve to zero stroke. * closed 741 Series Fluid Flow open * The 741V valve can be ordered in a tamper-resist configuration to limit unauthorized adjustment. [. . . ] East Providence, RI USA 800-556-3484; +1-401-434-1680 (outside the USA) info@efd-inc. com www. efd-inc. com EFD International Inc. Dunstable, Bedfordshire, UK 0800 585733 or +44 (0) 1582 666334 Ireland 00800 8272 9444 europe@efd-inc. com www. efd-inc. com EFD, Inc. , Asia China: +86 (21) 5854 2345 china@efd-inc. com www. efd-inc. com/cn Singapore: +65 6896 9630 sin-mal@efd-inc. com Teflon is a registered trademark of DuPont. ©2006 Nordson Corporation 741V-INSTALL-01 v062606 [. . . ]