User Guide

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How the Valve Operates
Input air pressure at 70 psi (4.8 bar) retracts the needle
➀➀
from its nozzle seat,
➁➁
allowing liquid to flow from the nozzle.
At the same time, nozzle air is turned on and flows from an
annulus
➂➂
around the liquid nozzle. This adjustable nozzle
air creates a pressure drop around the nozzle causing the
liquid to atomize into fine droplets.
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 nozzle and work surface.
To calibrate or document the dispensing process, use the
stroke control reference. To calibrate, turn the calibrating
adjustment (located in the end of the stroke adjustment
knob) out two full turns. Close the stroke adjustment knob
fully until it bottoms against the air cylinder body. Turn the
adjustment until it stops, calibrating the valve to zero stroke.
*
ValveMate Concept
The ValveMate 7040 provides easy adjustment of valve output
for maximum end-user convenience and efficiency. Valve
open time is the primary control of deposit. The 7040 puts
push-button adjustment of valve open time where it needs to
be – near the valve.
Microprocessor circuitry provides exact control of the spray
valve to achieve exceptional spray pattern definition. The
ValveMate 7040 also incorporates a built-in adjustable delay
in nozzle air shut-off to assure clean cut-off.
Deposit size can be programmed by using the TEACH function.
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.
Control Pad
set time
timer bypass
test cycle
move decimal
reset
TEACH program
set cutoff air delay
air input
power input
(voltage selector)
air output to valve
nozzle air
I/O connector
connector for
optional foot pedal
Rear Panel
Nozzle Air Gauge
Nozzle Air
Pressure Regulator
VALVEMATE
7040
*
The 781S valve can be ordered in a tamper-resist configuration
to limit unauthorized adjustment. Specify part #781S-TR or
#781S-SS-TR.
The primary control of deposit size is the valve open time.
closed open
781 Series Fluid Flow
➀➀
➂➂
➁➁
➀➀
➂➂
➁➁