Fluid dispensing valve application guide
Syringe/pinch tube valve
•        Use for applications where work life is short or clean up is difficult.
Spool valve – The Spool valve is designed for high pressure
applications and high viscosity materials such as RTVs, silicones,
greases and solder masks.

  • Handles viscosities from 5,000 to 1,000,000 centipoise (cps).

  • Low precision, high volume, high flow rate, high pressure.

  • Can handle filled materials to some extent; heavy fill could
    cause interference with shut off and could lead to leaking.

  • Abrasive particles will damage the spool and seals.

  • Stainless steel and Delrin® versions are available.

  • Spring close for fail-safe operation in case pressure shuts
    down.

  • Can be used with dual air for higher cycling and better
    repeatability
Diaphragm valve – The Diaphragm valve is designed to
dispense low to medium viscosity materials and is excellent
for cynoacrylates, anaerobics, UV adhesives and MEK.

  • Handles viscosities from 1 to 5,000 cps.

  • Use for moisture sensitive materials such as
    cynoacrylates because diaphragm seal does not
    introduce air and moisture.

  • Use for materials that cannot contact metal such as
    UV adhesives.

  • Good for aggressive materials as the wetted path is
    UHMW and Delrin® or PTFE.

  • Will not handle abrasives or filled material well.

  • Spring close for fail-safe operation.

  • Spring can be removed for higher cycling and better
    repeatability.
Needle valve – The Needle valve is excellent for a wide range of shot sizes
and materials such as adhesives, epoxies, silicones, inks and lubricants.

  • Handles viscosities from 1 to 100,000 cps.

  • Use for precision shot dispensing.

  • Can be used for a wide range of materials.

  • Will not handle fill particles or abrasives well.

  • Stainless steel and anodized aluminum available.

  • Spring close for fail safe operation.

  • Can be used with dual air for higher cycling and better repeatability.
Spray valve – The Spray valve is pneumatically actuated and use air pressure to
dispense low to medium viscosity materials such as lubricants, solvents, inks and
conformal coatings.

  • Can handle viscosities from 1 to 1,000 cps.

  • Cannot handle filled materials well.

  • Can be adjusted to a fine mist.

  • Use with conformal coatings and oils.

  • Stainless steel and anodized aluminum available.

  • Spring close for fail-safe operation.

  • Can be used with dual air for higher cycling and better repeatability.
Auger valve – The Auger valve has been designed for medium to high viscosity
material filled fluids such as solder pastes and urethanes.

  • Can handle viscosities from 30,000 to 500,000 cps.

  • Use for solder paste, encapsulants, surface mount adhesives and masks.

  • Can handle filled materials well.

  • Special configurations available for abrasive materials.

  • Can be controlled for high precision dispensing.

  • On-the-fly, electronically controlled adjustment.

  • Multiple configurations available for different material and application needs.
Delrin® is a registered trademark of E.I. DuPont de Nemours
Leading Edge Management LLC
P.O. Box 207, Ellicott City, Maryland 21041
Phone: 410-747-1120; Fax: 410-747-1170; Email: info@leadingedgemgt.net
“Focused on improving your measuring”™
Information on this page has been compiled with the assistance of Richard Jefferson, President of
Dispensing Science
Copyright © 2008 Leading Edge Management LLC  All rights reserved.