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Neptune
Model 23 Auto-Stop Switches used with
800 series preset registers extend the
Auto-Stop feature to electrically operated
systems for the remote actuation of valves,
pumps or other accessory equipment. They
can be supplied on new flowmeters or added
to flowmeters already designed for Auto-Stop
operation. They can be used with any 800
Series Preset Register.
There
are two types of Auto-Stop Switches, 23A
and 23B. They are identical in outward
appearance; however, the Model 23A is
a two-stage switch used with actuated
valves and the Model 23B is a single stage
switch.
Model
23A: The Model 23A is designed to be used only with
a double-trip Auto-Stop Register. The
Model 23A provides two switch closures
for two-stage shutdown of solenoid valves
with the final closure also de-energizing
the pump if needed. No mechanical valve
is needed with the Model 23A switch. Model
23A switches are double-pole double-throw
(DPDT).
Model
23B: The Model
23 B can be used with either a single
trip or double trip Auto-Stop Register.
Model 23B Switches provide one switch
closure for single trip valve shutdown
and/or pump de-energizing. They may be
used with or without an auto-stop valve.
Model 23B switches fit to the rear housing
of the auto-stop register and allow the
operator to electrically energize and
de-energize some other device in sequence
with the auto-stop register. The Model
23B switch is commonly wired to a motor
starter for a pump. When activating the
mechanical batch operation at the auto-stop
register, the pump is energized at the
same time. The switch closes and the pump
is de-energized at the end of the batch.
The Model 23B switch may be used with
the auto-stop register even if a mechanical
valve is not used. In these cases, the
Model 23B starts and stops the flow for
approximate batching application. Model
23B switches are single-pole double-throw
(SPDT).
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