User manual EFD 790 INSTALLATION GUIDE

[. . . ] 790 Dispense Valve INSTALLATION GUIDE Electronic pdf files of EFD® manuals are also available at www. efd-inc. com/manuals. html. ® A NORDSON COMPANY 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 Power cable Introduction The 790 is a precision dispense valve specifically designed for metering controlled deposits of solder pastes, thick sealants and other particle-filled materials. By combining screw-feed principles with precise time, pressure and dispensing control, the 790 valve is able to provide accurate, repeatable deposits without damaging the metal particles of the solder. [. . . ] As the auger rotates, fluid moves along the auger flutes and is forced-out through the dispense orifice. The ValveMateTM 7090 controller regulates the reservoir pressure, ensuring that there is enough pressure to keep the valve primed with fluid without forcing it past the auger. Duration of the dispensing time is controlled by adjusting the time control up or down until the required deposit size is established, at which point it is repeated with each initiate cycle. open closed ValveMate Concept The ValveMate 7090 provides easy adjustment of valve output for maximum end-user convenience and efficiency. Valve opentime is the primary control of deposit. The 7090 puts pushbutton adjustment of valve opentime where it needs to be ­ at the valve. Microprocessor circuitry provides exact control of the spray valve to achieve exceptional spray pattern definition. The ValveMate 7090 also incorporates microprocessor-controlled functions that include motor start-up acceleration limits and maximum current overload protection for extended motor life. Deposit size can be programmed by pressing the PROGRAM button in the SETUP mode. This affords an easy starting point for selecting deposit size. Note: The EFD Ultra® TT 325 and 525 XYZ automated dispensing systems have integrated ValveMate controllers for operating all EFD dispense valves. VALVEMATE 7090 M M Rear Panel air input power input (voltage selector) air output to valve connector for optional foot pedal Control Pad set time timer bypass display ­ pressure (psi, bar) ­ time ­ motor volts TEACH program test cycle purge reset www. efd-inc. com technical@efd-inc. com USA 800-556-3484 Europe +44 (0) 1582 666334 Asia +86 (21) 5854 2345 Specifications General Size: 155. 4 mm length x 28. 7 mm diameter (6. 12" x 1. 13") Weight: 314 grams (11. 07 oz) Fluid body: Type 303 stainless steel (Acetal optional) Auger: Type 303 stainless steel (Acetal optional) "U" cup: Viton® Fluid feed fitting: Type 303 stainless steel (Polypro optional) Auger speed: 250 RPM (400 RPM optional) Auger pitch: 8 threads per inch (16 threads per inch optional) ® For consistent dispense valve operation and easy adjustment of valve output, EFD recommends using the ValveMate 7090 controller on all automatic, semi-automatic and benchtop applications. [. . . ] ©2006 Nordson Corporation 790-INSTALL-01 v062606 This equipment is regulated by the European Union under WEEE Directive (2002/96/EC). See www. efd-inc. com for information about how to properly dispose of this equipment. [. . . ]