780S Series Spray Valves VALVEMATE™ 7040 Controller Operating Manual ® A NORDSON COMPANY US: 888-333-0311 UK: 0800 585733 Mexico: 001-800-556-3484
If you require any assistance or have specific questions, please contact us. US: 888-333-0311 Telephone: 401-434-1680 Fax: 401-431-0237 E-mail: technical@efd-inc.com Mexico: 001-800-556-3484 UK: 0800 585733 EFD Inc. 977 Waterman Avenue, East Providence, RI 02914-1342 USA Sales and service of EFD Dispense Valve Systems is available through EFD authorized distributors in over 30 countries. Please contact EFD U.S.A. for specific names and addresses.
Contents Introduction ..................................................................2 Specifications ..............................................................3 How The Valve and Controller Operate ......................4 Controller Operating Features ....................................5 Typical Setup ..............................................................6 Setup ........................................................................7-8 Adjusting the Spray...................................
Introduction The 780S Series precision Low Volume Low Pressure (LVLP) liquid spray valves are manufactured to the highest quality standards. The VALVEMATE™ 7040 controller features an adjustable nozzle air flow regulator and a microprocessor-based timed air pressure output for controlling the ON time of the 780S valve. This equipment is produced to very close tolerances to ensure proper and reliable operation. Each valve and controller has been thoroughly tested prior to shipping.
Specifications 780S Spray Valve Size: 4.120" x 1.060" dia. (104.6 x 26.9 mm) Weight: 780S: 8.3 oz (235 g) 780S-SS: 14.3 oz (405 g) Air cylinder body: 780S-SS: Type 303 stainless steel 780S: Hard-coated aluminum Fluid chamber: 780S-SS: Type 303 stainless steel 780S: Hard-coated aluminum VALVEMATE™ 7040 Controller Cabinet size: W 7.5" x D 5.6" x H 2.7" (W 19 x D 14 x H 7 cm) Net weight: 3.1 lb (1.4 kg) Air input required: 70 psi (4.
How The Valve and Controller Operate The 780S is a normally closed, air actuated needle type spray valve that uses a Low Volume Low Pressure (LVLP) design for high transfer efficiency without overspray or airborne mist. Air pressure from the VALVEMATE™ 7040 controller at 70 psi (4.8 bar) acts on a piston ➀ that retracts the needle ➁ from its nozzle seat ➂ and allows liquid to flow from the nozzle ➃.
Controller Operating Features 1. Cycle Press to initiate one complete dispense cycle. Press this button again to interrupt a timed cycle. Press and hold while in the time override mode for continuous cycle. Release to stop. Nozzle air gauge Nozzle air regulator 1 2 3 4 5 VALVEMATE 7040 2. Time override Press to override time control. Display will show (---). While in this mode, dispensing is manual using the cycle button, voltage initiate source or foot pedal (optional, #2015A). 3.
Typical Setup 5 micron filter regulator Plant air 70 psi (4.
Setup supply. Input Power 1. View cartridge window in power cord receptacle to ensure that fuse voltage value matches your input voltage. If it does not match, remove the fuse cartridge. Then remove the fuse holder from the cartridge, rotate the holder and position the correct voltage to show through the cartridge window. Replace the cartridge into the power cord receptacle and ensure that both sides snap securely into position. Connect the power cord.
11. Set the reservoir pressure regulator according to the fluid viscosity. For example, low viscosity fluids require only 1 to 3 psi (0.07 to 0.2 bar). Higher pressures are required for more viscous fluids. 12. Close needle stroke control knob, fully (clockwise), then set at one turn open. This is a starting point only. Final setting will be determined by the desired flow rate. 13. Check the nozzle air gauge. If not at zero, turn the regulator knob clockwise to turn off the nozzle air.
Adjusting the Spray ➀ Check to be sure steps 11 through 16 under Setup have been completed, then proceed to adjust the spray. 1. Using the needle stroke control knob ➀ on the 780S valve, set the fluid flow rate to one or two drops per second. Check flow rate by actuating the controller in the time override mode. Make valve stroke adjustments when the controller is off. 2. Set the nozzle air pressure on the VALVEMATE™ 7040 controller to 10 psi and actuate the controller.
Programming Nozzle Air Delay The nozzle air time delay can be changed from the factory setting of 0.24 seconds to fine-tune the shutoff characteristics of the 780S spray valve. When making small deposits of low viscosity fluid, it may be necessary to shorten the time delay to eliminate a hollow center in the deposit. To change the time delay: 1. Turn the power switch off. 2. Press and hold the time override button while turning power switch on. 3. The display will read "SEL" (select).
Spray Patterns Round Pattern Spray Area Coverage Nozzle Distance from the Work Surface: 1" 2" 3" 6" Nozzles 25.40 mm 50.80 mm 76.20 mm #7857-46SS Standard 0.046" (1.17 mm) 0.250" 6.35 mm 0.750" 1.500" 19.05 mm 38.10 mm 0.500" 12.70 mm 152.40 mm #7857-46WA-SS Wide-angle 0.046" 0.750" 1.500" (1.17 mm) 19.05 mm 38.10 mm Not 2.000" 50.80 mm Recommended #7857-28SS 0.028" (0.71 mm) 0.200" 5.08 mm 0.400" 10.16 mm 0.600" 1.200" 15.24 mm 30.48 mm #7857-14SS 0.014" (0.36 mm) 0.170" 4.32 mm 0.
Troubleshooting Guide Valve Trouble No fluid flow. Possible cause and correction If valve operating pressure is too low, the valve will not open. Increase air pressure to 70 psi (4.8 bar) minimum. The reservoir air pressure may not be high enough. Increase pressure. The nozzle may be clogged. Clean the nozzle. The stroke adjustment control may be closed. If it is closed, open counterclockwise one turn. The control and the nozzle air lines may be reversed.
VALVEMATE™ 7040 Trouble No power. Possible cause and correction Be sure that there is power at the wall receptacle. Check the input power fuse. If the fuse has blown, check the voltage value in the fuse cartridge window. Be sure that it matches the input voltage. End-of-Cycle Feedback Circuit is not functioning. Ensure that the external voltage to the circuit is between 5 and 24 VDC and that the load does not exceed 250 mA. If the circuit has been overloaded, the fuse may have blown.
Valve Maintenance Normal cleaning is accomplished by purging with appropriate solvent. The air cap and nozzle can be removed, soaked in solvent and reinstalled without demounting the valve. (Refer to Exploded View on page 17.) To thoroughly clean valve chamber and replace needle packings: 1. Remove the needle stroke control knob and spring to prevent damage to the needle and nozzle during reassembly. 2. Remove the air cap retainer, then the air cap, nozzle and fittings from the liquid chamber. 3.
from the needle. 7. Clean the needle with a cloth dampened in solvent. 8. Lubricate the needle with Nye Lubricant #865 gel and reinstall the needle packing spring and packings in accordance with Figure 2 below. 9. Install a new O-ring (#7517) on the fluid chamber. Screw the air cylinder onto the fluid chamber. Hand tighten only. The chamber can be backed off 1/2 turn from the air cylinder body to orient fittings. 10. Reinstall the nozzle, air cap, retainer and fittings.
To replace the piston and needle assembly or the piston O-ring: 1. 2. Remove the needle stroke control knob by turning counterclockwise until free. Remove the piston return spring and thrust washers located on each end of the spring. Note: The piston and needle assembly is replaced as a unit and cannot be disassembled. To reseat the needle and nozzle assembly: 1. Disconnect or shut off all air to the valve. 2. Rotate the stroke adjustment knob to the closed position by turning clockwise. 3.
780S Series Needle stroke reference control #780SSR-KIT (stainless steel) #780SR-KIT (aluminum) Items included in repair kit #780S-RK are listed in blue.
Input/Output Connections 1. Voltage Initiate Circuit The VALVEMATE™ 7040 may be initiated with a 5 to 24 VDC signal across pins 1 and 2. The signal can be momentary (no less than 0.02 seconds) or maintained. A new cycle will begin once power is removed and then applied again. Refer to the schematic on page 19 for proper installation. 2. End-of-Cycle Feedback Circuit Upon completion of a dispense cycle, an open collector circuit closes and remains closed until the next dispense cycle.
Programmable display Microcontroller 1 Opto coupler Voltage Initiate Circuit + 5 to 24 VDC power source power consumption _ 2.2 mA at 5 VDC 15.0 mA at 24 VDC 2 + _ Fuse 3 Opto coupler End-of-Cycle Feedback Circuit 5 to 24 VDC power source maximum load 250 mA 4 A relay is illustrated as one example for utilizing the feedback circuit.
Connecting more than one 7040 Controller Follow these instructions and diagrams when the Voltage Initiate or End-of-Cycle Feedback features are used in a multiple 7040 installation. 5 4 3 2 1 9 8 7 6 1. Voltage Initiate Circuit To start the dispense cycle for multiple 7040's at the same time, connect the Voltage Initiate Circuit in parallel as illustrated. 5 4 3 2 1 Note: The amperage consumption for the Voltage Initiate Circuit will increase with each VALVEMATE™ 7040 that is connected.
Replacement Parts for the 7040 Controller 1. 2-2002-7040 Regulator assembly 0 to 30 psi, 0 to 2.07 bar 2. 2-2003-7040A Control solenoid assembly 3. 2-2003-7040B Nozzle air solenoid assembly 4. 2-2006DB-VC Display PCB assembly 5. 2-2006PS-VC Power supply PCB assembly 6. 2-2017-1500 Foot pedal receptacle assembly 7. 2001A Gauge 0 to 30 psi, 0 to 2.07 bar 8. 2004B Female quick-connect - black (hidden from view - below item #9) 9. 2004B-W Female quick-connect - white 10.
EFD ONE YEAR LIMITED WARRANTY All components of EFD spray valves and VALVEMATE™ controllers are warranted for one year from date of purchase to be free from defects in material and workmanship (but not against damage caused by misuse, abrasion, corrosion, negligence, accident, faulty installation or by dispensing material incompatible with equipment) when the equipment is installed and operated in accordance with factory recommendations and instructions.
