Efd 702 INSTALLATION GUIDE

Introduction

The 702 Series dispense valve is simple to use and will
operate many millions of cycles without maintenance. The
702 Series incorporates a compact, precise, adjustable
diaphragm for dispensing low to medium viscosity fluids.

The 702 Series has a unique flat seat that enables the valve
to provide full flow at one half the stroke of a standard EFD
750 Series valve. This design also reduces turbulence and
provides bubble-free dispensing of dyes and UV-cure resins
used in the optical media and other industries. The central
control air allows the valve to obtain its small size.

Each valve is shipped with a stroke control adjustment key.

702 Series Dispense Valve

INSTALLATION GUIDE

Tamper-resist
stroke control

Fluid supply line

Control air hose

Air cylinder body

Fluid body

Tip retaining nut

Inlet fitting

Dispensing tip

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

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

®

A NORDSON COMPANY

1. Mount valve with an EFD universal

valve mount (#7002VM) or other
fixture.

2. Connect fluid supply line to valve.

Install M5 exterior thread fluid
fitting. (Not supplied with 702M
model.)

3. Connect the fluid supply line to

reservoir.

4. Connect valve control air hose to

ValveMate

™

controller (or other
pneumatic switch) used to control
valve open time.

5. Choose a dispensing tip—small

tips (20 gauge) for low-viscosity
fluids and larger (14 gauge) for
higher viscosities. We recommend
EFD PTFE-coated tips for the
702M-SS model.

6. Fill reservoir by pouring fluid

directly into tank liner or
manufacturer’s bottle placed inside
reservoir. Secure cover prior to
setting pressure.

7. Set reservoir pressure to low for thin

fluids and higher for thick fluids.

8. Set the stroke control starting with

no more than 1/2 turn open from
closed position (full clockwise).

*

9. Place a cup under the dispensing

tip and actuate the valve until fluid
lines, valve and dispensing tip are
free of air.

10. Set desired flow rate by adjusting

fluid reservoir pressure or changing
dispensing tip.

*

Do not overtighten the stroke adjustment
or open it more than one full turn. If open
more than one turn, pressurized liquid could
force open the diaphragm seal, resulting in
continuous liquid flow.

Installation

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.

POWER

RUN

SETUP

CYCLE

Test

Clear

Purge

Run

Setup Program

Fast Slow

Time Set

Steady

Fast Slow

Time Set

STOP

Pressure

Time

®

A NORDSON COMPANY

To pressurize

To exhaust

Set desired deposit size by adjusting valve open
time. Refer to valve controller operating manual.

11

O

pen

Close

8

1

7

5

2

6

4

10

3

9

Air Output

ut

Exhaust

r