User manual EFD 725D MAINTENANCE GUIDE

[. . . ] 725D-SS and 725D Piston Valves MAINTENANCE & PARTS GUIDE Electronic pdf files of EFD® manuals are also available at www. efd-inc. com/manuals. html. IMPORTANT!Save this Sheet. Forward to Maintenance or Tool Crib Supervisors A NORDSON COMPANY For EFD sales and service in over 30 countries, contact EFD or go to www. efd-inc. com/contact EFD, Inc. [. . . ] Inspect for damaged threads, piston pins for straightness and fluid body seat for pitting. Reassemble the valve in reverse order of disassembly. Lubricate parts indicated with Nye Lubricant #865 included in the General Maintenance Kit. * * * * * Tip adapter #2186BP 1/4 NPT O-ring #72540A (Viton®) 2 Fluid body #72538-SS (stainless steel) #72538 (hard-coated aluminum) Fluid inlet fitting #7543BP 5 3 Body cap with O-ring #72543-SS (stainless steel) #72543 (Viton) Sealing head with screw #72539 8 1 Shoulder Shaft #72537 Diaphragm #72536 www. efd-inc. com info@efd-inc. com USA 800-556-3484 Europe +44 (0) 1582 666334 Asia +86 (21) 5854 2345 Sales and service of EFD dispensing systems are available worldwide. General Maintenance Kit #725D-RK Includes air cylinder and body cap O-rings, diaphragm, sealing head with screw and lubricant. Maintenance Tools: 1/8" hex wrench 1/4" flat-tip screwdriver 3/8" box wrench 7/8" open-end wrench 1/8 NPT male pipe or rod step 3 5 7 8 9 part Sealing head screw Fluid body Shaft locking screw Shaft Air cylinder cap newton meters 1. 69 6. 78 2. 82 1. 69 10. 8 Nm Nm Nm Nm Nm (inch pounds) (15 inch pounds) (5 foot pounds) (25 inch pounds) (15 inch pounds) (8 foot pounds) * Parts that require a specific torque when reassembling the valve. Air cylinder body assembly #72535 Spring #72528 Thrust washer #72533 Push-in fitting 1/8 NPT x 1/4 OD #2184 7 10 4 Air cylinder wall ID Air piston with O-ring and shaft locking screw #72532 O-ring only #72532A Shaft locking screw #72531 9 6 Air cylinder cap with O-ring #72530 O-ring only #72530A (Buna) www. efd-inc. com info@efd-inc. com USA 800-556-3484 Europe +44 (0) 1582 666334 Asia +86 (21) 5854 2345 Sales and service of EFD dispensing systems are available worldwide. Troubleshooting Guide No fluid flow · · · · · · If valve operating air 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. Fluid may have solidified in the fluid body. Fluid supply line is installed in blind mounting hole. Remove and reinstall properly. case, replace the sealing head in accordance with the maintenance instructions. Valve responds slowly when opening and closing · Valve response is related to control air hose length and size. The EFD valve is supplied with 5 feet of 1/8" tubing attached. Any additional length or size change will affect response time. Check to be sure the length and size have not been changed. Fluid flows out of the drain hole · Fluid drools after the valve closes, eventually stopping Fluid flowing out of the drain hole indicates a ruptured diaphragm. Replace in accordance with the maintenance instructions. · · This is caused when air is trapped in the outlet section of the fluid body or the fluid has entrapped air. [. . . ] Check to be sure the valve controller is providing a consistent output. A NORDSON COMPANY Fluid drips at a steady rate after the valve closes · A steady drip indicates failure of the sealing head to close fully due to particle buildup or wear. In either 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 ©2006 Nordson Corporation 725D-MAINT-01 v062606 [. . . ]