Series 3731 explosion-proof valve
positioners from Samson Controls
are housed in a rugged enclosure
which, even if an explosive
atmosphere forms inside the
enclosure and ignites, the enclosure
will withstand the explosion
preventing the passage of flames out
to the explosive surroundings.

Intrinsically-safe, the positioners
provide a high degree of accuracy
and are easy-to-operate. A single
rotary pushbutton is all that is
required for start-up; turn to select
parameters and push to activate. This
method is still possible in hazardous
areas because the shaft design of the
rotary pushbutton through the
housing is explosion-proof. The
enclosure with its separate terminal
compartment, allows direct cable
entry or connection without spark
barriers for cable conduit systems.

The easy-to-read LCD can be
rotated 180° at the touch of a button.