Anti-Bottoming:
The single most effective technique to increase the life
of a DC solenoid is to prevent the metal to metal contact
between the plug and plunger. This can be accomplished by
using a non-metallic plunger stop, either on the outside of
the solenoid or at the interface between plug and plunger
on the inside. In some cases, longevity can be increased by
a factor of 50 or more by this means. It must be understood
that the gap introduced between plug and plunger must be taken
into account so that the force delivered by the solenoid is
concerned.
Holding Force:
The Long Life tubular solenoids are "anti-bottoming" units
and the holding forces indicated on our specification sheets
are the forces the solenoids hold against their anti-bottoming
means.
Load Application:
Proper alignment of plunger and load is important. It is
desirable that solenoids be operated in a vertical position
(plunger moving vertically) whenever possible. Side loading,
that is, loading which is not centered directly along the
line of plunger travel, should be avoided. The results of
misalignment are premature wear of plungers and plunger bores
and possible impairment of seating.
Power Input:
Selection of a solenoid which most closely matches the mechanical
load requirement is most desirable. Energy in excess of that
required to do the work required must be dissipated. If the
extra force imparted to the plunger is not used either by
the load or by some spring cushioning means, the energy will
be dissipated at the time of impact of the plunger against
the plug. This excessive impacting causes early failure of
the solenoid.
Speed of Operation:
The speed of operation of a DC solenoid is dependent upon
the input power (NI), the stroke and the load against which
it operates and to some degree upon its orientation, whether
vertical, horizontal or other. The operate times shown on
our data and specification sheets are typical at the values
of NI, stroke, load and orientation indicated. Operate time
will increase with an increase of load and stroke and a decrease
in NI input. Conversely, any decrease in load and stroke or
increase in NI will shorten operate time.
All
Guardian Solenoid Specifications
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