EFD 780S User Manual

US: 888-333-0311
UK: 0800 585733
Mexico: 001-800-556-3484

780S Series Spray Valves
VALVEMATE

™

7040 Controller

Operating Manual

®

A NORDSON COMPANY

If you require any assistance or have spe­cific questions, please contact us.

US: 888-333-0311
Telephone: [phone]
Fax: [phone]
E-mail: [e-mail]

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 specific names and addresses.

Contents

Introduction..................................................................2

Specifications ..............................................................3

How The Valve and Controller Operate ......................4

Controller Operating Features ....................................5

Typical Setup ..............................................................6

Setup ........................................................................7-8

Adjusting the Spray......................................................9

Programming Nozzle Air Delay ..................................10

Spray Patterns ..........................................................11

Troubleshooting Guide ........................................12-13

Valve Maintenance................................................14-16

780S Exploded View..................................................17

Input / Output Connections..................................18-19

Connecting More than One 7040 Controller..............20

7040 Schematic and Replacement Parts ..................21

Warranty ....................................................................22

Meets CSA and CE standards.

780/7040-MAN ©2003 EFD Inc.
This manual is for the express and sole use of EFD valve purchasers and users,
and no portion of this manual may be reproduced in any form.

EFD and VALVEMATE are trademarks of EFD Inc.
Teflon is a registered trademark of DuPont.

2 / Introduction

Introduction

The 780S Series precision Low Volume Low Pressure
(LVLP) liquid spray valves are manufactured to the

highest quality standards. The VALVEMATE™7040
controller features an adjustable nozzle air flow
regulator and a microprocessor-based timed air pres­sure output for controlling the ON time of the 780S
valve.

This equipment is produced to very close tolerances to
ensure proper and reliable operation. Each valve and
controller has been thoroughly tested prior to shipping.

The 780S and VALVEMATE™7040 are simple to use
and will operate many millions of cycles without main­tenance. Spray valve cleaning is accomplished by
purging with the appropriate solvent.

To obtain the maximum performance from this fine
equipment, please read through these instructions
carefully.

Note: All stainless steel valve parts are passivated.

Specifications and technical details are subject to
engineering changes without prior notification.

VALVEMATE™7040 Controller

Cabinet size: W 7.5" x D 5.6" x H 2.7"

(W 19 x D 14 x H 7 cm)

Net weight: 3.1 lb (1.4 kg)

Air input required: 70 psi (4.8 bar) minimum

Input voltage: 100/120/220 VAC selectable

Power required: 50/60 Hz 14/12VA

Foot pedal voltage: 5 VDC

Time range: .001 to 99.9 seconds

Timing control: Microprocessor-based CMOS logic

Time cycle repeat 0.00005 seconds

Time reset: Less than 20 milliseconds

Initiation: Dry contact closure or 5 to 24 VDC signal

Output pressure:

Actuating air 70 psi (4.8 bar)
Nozzle air 1 to 30 psi (0.07 to 2.07 bar)

Cycle rate: Exceeds 600 per minute

Cycle end feedback circuit: N.C. solid-state switch

5 to 24 VDC, 250 mA maximum load

Specifications

780S Spray Valve

Size: 4.120" x 1.060" dia. (104.6 x 26.9 mm)

Weight: 780S: 8.3 oz (235 g)

780S-SS: 14.3 oz (405 g)

Air cylinder body: 780S-SS: Type 303 stainless steel

780S: Hard-coated aluminum

Fluid chamber: 780S-SS: Type 303 stainless steel

780S: Hard-coated aluminum

Piston: Type 303 stainless steel

Piston return spring: Type 303 stainless steel

Needle and Nozzle: Type 303 stainless steel

Air cap: 780S-SS: Type 303 stainless steel

780S: Plated brass

Needle packings: Teflon

®

Packing spring: Stainless steel

Liquid inlet hole: 1/8 NPT female

Mounting: 1/4-28 UNF tapped hole

Operating frequency: Exceeds 400 per minute

Air pressure required: 70 psi (4.8 bar)

Minimum mounting center distance: 1.067" (27.1 mm)

Standard nozzle diameter: 0.046" (1.17 mm)

Optional nozzle sizes: 0.028" (0.71 mm)

0.014" (0.36 mm)

Spray patterns: Round (standard)

Fan (optional)

3 / Specifications

How The Valve and Controller Operate

open position

The 780S is a normally closed, air actuated needle
type spray valve that uses a Low Volume Low
Pressure (LVLP) design for high transfer efficiency
without overspray or airborne mist.

Air pressure from the VALVEMATE™7040 controller at
70 psi (4.8 bar) acts on a piston➀that retracts the nee­dle ➁ from its nozzle seat ➂ and allows liquid to flow
from the nozzle ➃. At the same time, nozzle air, also
from the 7040, is turned on and flows from an annulus

➄ around the liquid nozzle.

This adjustable nozzle air creates a pressure drop
around the nozzle, causing the liquid to atomize into
fine droplets.

When the timed actuating air from the 7040 shuts off,
the piston spring moves the needle onto the nozzle
seat, shutting off liquid flow. A preset nozzle air delay
ensures that no liquid remains on the nozzle after the
valve closes, eliminating after-deposit spatter.

The amount sprayed is controlled by the valve open
time, reservoir pressure and needle stroke. Area of
coverage is determined by the nozzle size and the dis­tance between the 780S nozzle and the work surface.

closed position

4 / How The Valve and Controller Operate

Piston and needle

➀

Nozzle seat

➂

Needle

➁

Annulus

➄

Nozzle

➃

Piston and needle assembly
Fluid
Nozzle air
Operating air

1. Cycle

Press to initiate one complete dispense
cycle. Press this button again to interrupt a
timed cycle. Press and hold while in the time
override mode for continuous cycle. Release
to stop.

2. Time override

Press to override time control. Display will
show (---). While in this mode, dispensing is
manual using the cycle button, voltage initi­ate source or foot pedal (optional, #2015A).

3. Decimal

Press to move decimal and change time
range maximums from .999 to 9.99 or 99.9.
Decimal does not appear in the display while
in the .999 second range.

4. Program

Press to clear display to zeros. Display
flashes bright/dim while in program mode.
Press cycle button and hold until proper
amount is sprayed. Total spray time will be
displayed. Press program button again to
lock in spray time.

5. Time set

Press to change time setting up or down.
Press and release to advance one digit at a
time, or press and hold to scroll quickly.

6. Foot pedal connector

If using the optional foot pedal, press the
pedal momentarily to initiate the 7040 con­troller. To interrupt a timed dispense cycle,
press the pedal again.

Controller Operating Features

5 / Controller Operating Features

Nozzle

air regulator

Nozzle

air gauge

12

3

5

Power
switch

6

Air input
quick-coupler
70 psi (4.8 bar)
minimum input
pressure

Valve
operating
air output
(white)

Nozzle
air output
(black)

Output A

Output B

Air
exhaust

9 pin D connector

I/O interface

(see page 18 for details)

Input power

cord receptacle

(see page 7

for details)

120

4

VALVEMATE

7040

Caution: Always depressurize the reservoir before

opening. To do this, slide the shutoff valve on the
air line away from the reservoir. If using an EFD
tank, open the pressure relief valve as well. Before
opening the reservoir, check the pressure gauge to
verify that pressure is zero (0).

On all EFD cartridge reservoirs, the unique thread­ed design provides fail-safe air pressure release
during cap removal.

Typical Setup

6 / Typical Setup

5 micron filter regulator

Fluid feed hose

#7543BP (installed)
for 1/4" OD tube

Pressurized reservoir

with air regulator

ValveMate™
7040 Controller

Plant air
70 psi (4.8 bar)
minimum

Material
Constant air
Pulsed air for valve operation
Pulsed nozzle air

VALVEMATE

7040

20

0

5

Control air line

Air tee

White quick connect

Flexible air line

Fluid inlet fitting

Pressure relief valve

Black quick-connect

Shutoff valve

To pressurizeTo exhaust

#7610BP (included)
for 3/8" OD tube