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Smart Valve Controller (SVC)
Latching Solenoid Design for Minimal
Battery Power Consumption...
No need to check the battery more than
once a year
Using a unique
latching solenoid
design on the valve,
the Hunter SVC
battery-powered
controller consumes
very little power,
which allows the controller to
operate valves for a full season
What is a latching solenoid? Latching
solenoids are activated in the same manner
as a traditional non-latching solenoid. The
controller sends a positive pulse to the DC
latching solenoid causing the solenoid plunger
to “pull up” which drains the upper chamber
of the valve. This causes the diaphragm to lift
off the valve seat which allows the valve to
open (turn on). This is where the similarities
end. In standard non-latching solenoids, in
which the traditional controller must provide
a constant power supply to the solenoid coil
to hold the plunger up, the direct current (DC)
latching solenoid plunger is held in place by
the magnetic eld generated by the magnet
around the bottom of the solenoid cavity.
When the irrigation program is nished, the
battery-powered controller sends a very short
negative pulse to the DC latching solenoid,
causing the plunger to drop. This allows the
upper chamber to ll with water, causing the
diaphragm to seal against the valve seat and
close the valve. These short pulses consume
very little battery power, allowing a battery-
powered controller to work for many, many
cycles.
The DC latching solenoid is pre-attached to
the SVC-100 unit utilizing a black wire lead
and a red wire lead. The 24" wire leads allow
the user to conveniently program the SVC
from outside the valve box. The SVC-400
comes with 12" of wire to allow connection
of up to 4 DC latching solenoids (solenoids
sold separately).
Non-Volatile Memory...
Maintains irrigation programs indenitely
The Hunter battery-powered controllers have
what many of the sophisticated electronic
controllers have: a non-volatile memory. With
the controllerʼs non-volatile memory, the set
irrigation program is maintained indenitely,
providing a useful feature when the controller
battery becomes weak or when the battery
needs to be replaced. The replaceable 9-volt
alkaline battery keeps the time of day and
operates the DC solenoids. The controller
program is maintained through the controllersʼ
non-volatile memory.
Controller is Waterproof up to 12 Feet of
Submersion...
Moisture intrusion is non-existent
In-ground valve boxes, which can create
extremely humid environments, are not
a problem for the SVC battery-powered
controller. Installers and users can rest assured
that moisture intrusion will not occur in the
Hunter SVC controller as the sealed case is
completely waterproof and provides protection
from humidity as well as submersion in water
up to twelve feet deep.
Double Sealed Battery Compartment...
Double protection against battery damage due
to water intrusion
A concern of
contractors
about connecting
battery-powered
controllers in
below ground
valve boxes is
the controllerʼs
ability to
withstand water intrusion into the battery
compartment. All Hunter battery-powered
controllers are designed with a double rubber
seal (one O-ring seal in the body and a second
seal inside the cap) to guard against water
intrusion into the unit.
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