In
the case of a normally closed
type of conventional solenoid
valve, continuous energization
is required to maintain open
state. The latching solenoid
valve doesn't require a power
supply for the purpose of
maintaining open state through
the utilization of a permanent
magnet. Please see here for an
explanation of the principles of
operation.
Operation principles of the
latching mechanism.
【Merits
of the Latching Solenoid Valve】
1.
Eco-friendly
and energy efficient.
A latching solenoid valve does
not require energization to
maintain its state, so for
applications where a
conventional valve would require
long periods of energization the
economical benefits are
significant.
2.
Low heat generation limiting
thermal influence on
surroundings.
As energization is not required
to maintain the state, the heat
generation associated with
energization is reduced.
Suitable for analytical fields
and other applications where the
effect of temperature on a fluid
is a concern. The "EL
Series" pinch valve is an
example of one product that uses
this mechanism. Other latching
solenoid pinch valves and
diaphragm valves are also
available.
3.
Compact and powerful
A large current is necessary to
create a large force from a
solenoid, however to prevent a
burnout it is usually necessary
to make a larger size of
solenoid (i.e. a
larger electrical capacitance),
or to limit the energization to
short periods of time.
However as the heat generation
in a latching solenoid is
suppressed, large power outputs
can be achieved without
restraints on energization time
or the size of the solenoid.
This contributes to compact
sizing and a high-pressure
rating, and also allows for a
continuous duty cycle.
