Plump for explosion proof
May 1st 2009 Accuracy, ease of operation and
configurability on-site are among the
key features of the Series 3731
explosion-proof valve positioners,
available from Samson Controls.
The positioners are housed in a
rugged enclosure which, even if an
explosive atmosphere forms inside
the enclosure and ignites, will
withstand the explosion and will also
prevent the passage of flames out to
the explosive surroundings.
The positioners also benefit from
low power consumption and can be
conveniently configured on-site, or
by using HART communication.
A single rotary pushbutton is all
that is required for start-up; turn to
select parameters and push to
activate them.This method is still
The Universal Power Alert (UPA)
device from Marsh Bellofram
Europe provides a highly visual
Hodge Clemco has introduced a new
blast operator's helmet with new
design features to improve comfort,
visibility, durability and convenience.
The main shell of the new Apollo
600 helmet is heavy-duty
polypropylene and is large enough
for operators to wear air defenders.
External noise attenuation
performance is improved, and noise
from the internal air-flow has been
reduced. The outer cover is deep
enough to provide protection from
abrasive rebound for the top of the
cape. The fixed visor gives a wide
view and is easy to fit, with tear-off
transparent strips providing
convenient protection and clear
visibility. The air-flow is fed through
a single hose.
possible in hazardous areas because
the shaft design of the rotary
pushbutton through the housing is
explosion-proof. An easy-to-read
liquid crystal display ensures that
relevant data is visible at a glance. More articles from Samson Controls (London) Ltd: | 
