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The Jesco N-2990
Series Electric Drive Double Acting dispensers
were designed to dispense small amounts of low
to moderately high viscosity materials. A Stepper
Motor Driven Linear Actuator is used to drive
2 Lance type Positive Piston Displacement Meters.
The meters are arranged in an opposed fashion
such that when one meter is Dispensing, the
other meter is Refilling. In this manner, the
Double Acting Metering provides a nearly continuous
flow of material, thus eliminating the need
for Refill time.
Each positive displacement meter has its own
set of power operated inlet and outlet flow
valves. Both inlets are plumbed together to
a common material feed system and both outlets
are plumbed together to a common applicator
valve. Each metering unit includes its own pressure
transducer, allowing the PLC controller to monitor
for proper operating conditions in each meter
at all times.
These systems are designed to accurately dispense
either small repeatable shots or small consistent
beads of material at a constant flow rate. Both
are adjustable via a thumbwheel on the operator
interface. Dispensers are available in 1.8 cc,
7.2 cc and 16.3 cc per stroke displacements
in order to better fit the requirements of an
application. Shot sizes as small as 0.015 cc
per shot can be dispensed. Flow rates as low
as 0.015 cc/sec can be dispensed in bead mode.
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