EFD 790 INSTALLATION GUIDE

Introduction

The 790 is a precision dispense valve specifically
designed for metering controlled deposits of solder
pastes, thick sealants and other particle-filled materials.

By combining screw-feed principles with precise time,
pressure and dispensing control, the 790 valve is able to
provide accurate, repeatable deposits without damaging
the metal particles of the solder. These features are not
possible with any other type of conventional control valve.

790 Dispense Valve

INSTALLATION GUIDE

USA: 800-556-3484 or [phone]
Europe: 0800 585733 or [phone]
Asia: [phone]
[e-mail] www.efd-inc.com

Electronic pdf files of EFD®manuals are also available at
www.efd-inc.com/manuals.html.

®

A NORDSON COMPANY

Power cable

Motor chamber

Fluid feed fitting

Dispensing tip

Barrel
retaining
clamp

Installation

1. Connect the motor lead wire to

the I/0 connector position 7 (white
wire) and position 8 (brown wire).

2. Install the barrel of red purge

compound (supplied) onto the
dispense valve-inlet fitting.

3. Press the barrel into the fitting

while rotating one-half turn
clockwise. Do not overtighten.

4. Attach the yellow end of the

barrel adapter assembly to the
barrel of red purge compound.

5. Install the black quick-connect

into the air output connector
labeled "Constant Pressure.”

6. Install a pink 20 gauge dispens-

ing tip (supplied, part #5120-1/4)
onto the valve outlet.

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.

1

4

5

2

3

6

VALVEMATE

7090

M

M

How the Valve Operates

ValveMate Concept

The ValveMate 7090 provides
easy adjustment of valve output
for maximum end-user conven­ience and efficiency. Valve open­time is the primary control of
deposit. The 7090 puts push­button adjustment of valve open­time where it needs to be – at
the valve.

Microprocessor circuitry provides
exact control of the spray valve
to achieve exceptional spray pat­tern definition. The ValveMate
7090 also incorporates micro­processor-controlled functions
that include motor start-up

open closed

➁➁

➀➀

Input-air pressure at 65 psi (4.5 bar) is
applied to the material reservoir, forc­ing fluid

➀➀

into the path of the auger.
As the auger rotates, fluid moves along
the auger flutes

➁➁

and is forced-out

through the dispense orifice.

The ValveMateTM7090 controller regu­lates the reservoir pressure, ensuring
that there is enough pressure to keep
the valve primed with fluid without
forcing it past the auger.

Duration of the dispensing time
is controlled by adjusting the
time control up or down until the
required deposit size is estab­lished, at which point it is repeated
with each initiate cycle.

acceleration limits and maxi­mum current overload protec­tion for extended motor life.

Deposit size can be pro­grammed by pressing the
PROGRAM button in the
SETUP mode. This affords
an easy starting point for
selecting deposit size.

Note: The EFD Ultra

®

TT 325
and 525 XYZ automated dis­pensing systems have inte­grated ValveMate controllers
for operating all EFD dispense
valves.

www.efd-inc.com [e-mail] USA 800-556-3484 Europe [phone] Asia [phone]

VALVEMATE

7090

Rear Panel

air input
power input
(voltage selector)
air output to valve

connector for
optional foot pedal

M

Control Pad

set time
timer bypass
display – pressure (psi, bar)
– time
– motor volts
TEACH program
test cycle
purge
reset

M

Specifications

General

Size: 155.4 mm length x 28.7 mm diameter (6.12" x 1.13")

Weight: 314 grams (11.07 oz)

Fluid body: Type 303 stainless steel (Acetal optional)

Auger: Type 303 stainless steel (Acetal optional)

"U" cup: Viton

®

Fluid feed fitting: Type 303 stainless steel (Polypro optional)

Auger speed: 250 RPM (400 RPM optional)

Auger pitch: 8 threads per inch (16 threads per inch optional)

For consistent dispense valve operation and easy adjustment
of valve output, EFD recommends using the ValveMate 7090
controller on all automatic, semi-automatic and benchtop
applications.

The EFD Ultra TT Series positioning systems incorporate
dispensing control into the main system.

Contact the EFD Dispense Valve Systems Group for details.

For EFD sales and service in over 30 countries,
contact EFD or go to www.efd-inc.com/contact

EFD, Inc.

East Providence, RI USA
800-556-3484; [phone] (outside the USA)
[e-mail] www.efd-inc.com

EFD International Inc.

Dunstable, Bedfordshire, UK
0800 585733 or [phone]
Ireland 00800 8272 9444
[e-mail] www.efd-inc.com

EFD, Inc., Asia

China: [phone]
[e-mail] www.efd-inc.com/cn
Singapore: [phone] [e-mail]

Viton is a registered trademark of E.I. DuPont.
©2006 Nordson Corporation 790-INSTALL-01 v062606

®

A NORDSON COMPANY

This equipment is regulated by the European Union under WEEE
Directive (2002/96/EC). See www.efd-inc.com for information about
how to properly dispose of this equipment.