740V Series Dispense Valve Operating Manual 5 0 20 ® A NORDSON COMPANY US: 88-333-0311 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 names and addresses.
Contents Introduction ..................................................................2 Specifications and Flow Chart ....................................3 How The Valve Operates ..........................................4-5 Typical Setup ............................................................ 6 Setup Instructions........................................................7 740V-SS Exploded View ..............................................8 Maintenance and Cleaning ....................................
Introduction The 740V Series dispense valves are precise, needletype valves manufactured to the highest quality standards. The valves are produced to very close tolerances to ensure proper and reliable operation. Each valve has been thoroughly tested prior to shipping. The 740V valves are used with VALVEMATE™ controllers for precise, repeatable outputs from a fraction of a microliter up to continuous stripes of low to high viscosity fluids. It is an ideal valve for use on automatic assembly machines.
Construction Specifications Air cylinder body: Hard-coated aluminum Fluid chamber: 740V-SS: Type 303 stainless steel 740V: Hard-coated aluminum Piston: Type 303 stainless steel Needle: Type 303 stainless steel Tip adapter/needle seat: Type 303 stainless steel SafetyLok™ collar: Nylon Needle packings: Teflon® Size: 4.510" x 1.060" diameter (114.6 mm x 26.9 mm) Weight: 740V-SS: 9.0 oz (255 g) 740V: 6.36 oz (180.
➄ How the Valve Operates The 740V Series valve is a normally closed, fail-safe, adjustable opening needle valve. The amount of fluid dispensed is determined by length of time the valve is open; fluid reservoir pressure; output dispensing tip size; needle stroke; and fluid viscosity. ➀ The 740V Series require 70 psi (4.8 bar) air pressure. This air pressure acting on the piston ➀ retracts the piston and needle ➁ from the needle seat ➂, permitting fluid flow from the output tip adapter ➃.
Stroke Control Reference Tamper Resist Option The Stroke Control Reference feature is used to calibrate the stroke control setting or document the dispensing process. Any 740V Series valve can be ordered in the tamper resist configuration to limit unauthorized adjustment. To calibrate the valve, the stroke control knob is first closed all the way.
Typical Setup Five-micron filter regulator #2000F755 Set at 70 psi (4.8 bar) White quick-connect Shutoff valve To exhaust To pressurize Air tee #1116 Flexible air line #2310S Note: Use only oil-free, clean, dry filtered air.
