User manual EFD 781S INSTALLATION GUIDE

[. . . ] The 781S air cylinder body and fluid body are hard-coated aluminum. The 781S-SS valve model uses stainless steel throughout. Fluid supply line Needle stroke control knob Stroke reference ring Nozzle air hose Inlet fitting LVLP spray valve To exhaust To pressurize Installation Prior to installing this valve, please read the associated reservoir and valve controller operating instructions to become familiar with the operation of all components of the dispensing system. 2 1 1. Mount valve with an EFD universal valve mount (#7002VM) or other fixture. Connect the fluid supply line to the fluid inlet port and to the reservoir. [. . . ] Set the nozzle air pressure on the ValveMate 7040 controller to 10 psi (. 7 bar) and actuate the controller. To change fluid flow, use the needle stroke control knob and/or reservoir pressure. To change nozzle air, use the nozzle air pressure regulator. Higher pressures will provide finer spray. 5 0 20 2. 3. Output A 3 5 4. Output B VALVEMATE 7040 5. 6. 4 6 7. 8 VALVEMATE 7040 7 Open Close 8. Note: The area of spray coverage is determined by the distance between the spray valve nozzle and the work surface. Refer to the charts on the back page to determine this distance. How the Valve Operates Input air pressure at 70 psi (4. 8 bar) retracts the needle from its nozzle seat, allowing liquid to flow from the nozzle. At the same time, nozzle air is turned on and flows from an annulus around the liquid nozzle. This adjustable nozzle air creates a pressure drop around the nozzle causing the liquid to atomize into fine droplets. The amount sprayed is controlled by the valve open time, reservoir pressure and needle stroke. Area of coverage is determined by the nozzle size and the distance between the nozzle and work surface. 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. * 781 Series Fluid Flow closed open * The 781S 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 781S-INSTALL-01 For consistent dispense valve operation and easy adjustment of valve output, EFD recommends using the ValveMate 7040 controller on all automatic, semi-automatic and benchtop applications. [. . . ]