Input air pressure at 70 psi (4.8 bar) retracts the needle
➀
➀
from the needle seat
➁
➁
, permitting fluid flow from the output
tip adapter
➂
➂
. Piston and needle stroke and fluid flow are
controlled by the stroke control knob. Once the cycle is
complete, air is exhausted back through the valve controller,
ensuring rapid and positive fluid shutoff.
The 741V Series can be operated in any position without
affecting flow. The amount of fluid dispensed will depend on
the time the valve is open, fluid reservoir pressure, dispensing
tip size, needle stroke and fluid viscosity.
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 7000 provides easy adjustment of valve output
for maximum end-user convenience and efficiency. Valve
open time is the primary control of deposit. The 7000 puts
push-button adjustment of valve open time where it needs
to be — near the valve.
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.
POWER
RUN
SETUP
CYCLE
STOP
Test
Clear
Purge
Run
Setup
Program
Fast
Slow
Time Set
Steady
Pressure
Time
Fast
Slow
Time Set
®
A NORDSON COMPANY
VALVEMATE
7000
Function Indicators
Emergency Stop
Control Pad
set time
timer bypass
display pressure (psi, bar)
TEACH program
test cycle
purge
reset
air input
power input
(voltage selector)
air output to valve
I/O connector with alarm
output (<60 psi)
connector for
optional foot pedal
Rear Panel
Pressure/Time Toggle
*
The 741V valve can be ordered in a tamper-resist configuration
to limit unauthorized adjustment. Specify part #741V-TR. For
the stainless steel model, specify part #741V-SS-TR.
How the Valve Operates
The primary control of deposit size is the valve open time.
closed
open
741 Series Fluid Flow
➀
➀
➂
➂
➁
➁
➀
➀
➂
➂
➁
➁
www.efd-inc.com [email protected] USA 800-556-3484 44 (0) 1582 666334 Asia +86 (21) 5854 2345
