725HF High Flow Series Dispense Valves
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800-556-3484 Sales and service of Nordson EFD dispensing systems are available worldwide.
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How the Valve Operates
Input air pressure at 4.8 bar (70 psi)
forces the internal piston
to move down,
causing the diaphragm seal
to deflect
and the sealing head
to open and permit
fluid flow. When the input air pressure
exhausts, the spring retracts the piston and
the sealing head closes, stopping the fluid
flow and pulling back a slight amount of
fluid.
For stripes and lines, input air pressure
can be lowered to eliminate opening
surge.
The primary control of deposit size is the valve open time.
The amount of fluid dispensed will
depend on the time the valve is
open, the viscosity of the fluid, the air
pressure in the fluid reservoir and the
dispensing tip size.
Flow rate is a function of reservoir
pressure, stroke adjustment setting, tip
size and fluid viscosity.
ValveMate Concept
The ValveMate 8000 provides easy adjustment
of valve output for maximum end-user
convenience and efficiency. Valve open time
is the primary control of deposit. The 8000
puts push-button adjustment of valve open
time where it needs to be—at the valve.
The ValeMate 8000 features micro-processor
circuity for extremely precise control of
deposit size. Feed lines can be purged, initial
deposit sizes set, and adjustments made quickly
and easily at the dispensing station, without stopping the
production line.
NOTE:
Nordson EFD automated dispensing systems integrate
with ValveMate controllers for operating all pneumatic and
BackPack
™
dispense valves.
Important Note: Order your 1, 2, 3 or 4
solenoid manifold block assembly separately.
Consult EFD for recommendations.
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