ELSA DASH/SPRINT
5
2.5 DEMAND VALVE
(SPRINT)
Instant Positive Pressure DV
The demand valve employs a servo
assisted, tilting diaphragm to regulate
the supply of air into the facepiece. It
operates in conjunction with the
spring-loaded
exhale
valve
to
maintain a positive pressure within
the facepiece.
First Breath DV
The demand valve is available with a
First Breath actuation mechanism
that becomes active when the wearer
takes a first breath, or with Instant
Positive Pressure where air is
available as soon as the cylinder
valve is opened.
Demand valves with a First Breath
Mechanism have a black cover, while
Instant Positive Pressure demand
valves have an orange cover.
First Breath Mechanism demand
valves have a black rubber reset
button which, when pressed, closes
the demand valve. This permits the
demand valve to be removed from the
facepiece for testing or at the end of
an escape. Once reset the demand
valve is opened by the wearer
inhaling sharply.
2.6 CYLINDER VALVES
(DASH/SPRINT)
The cylinder valve has a handwheel-
operated slug which closes the valve.
The charging port is a DIN 477 type
A.
The contents gauge, which indicates
the cylinder charge level, has three
coloured
sectors:
green
(fully
charged), orange (safe to use but will
not provide the full duration) and red
(Empty - DO NOT USE).
A burst disc is fitted, which blows if
the cylinder charge exceeds 300 bar,
and in the event of damage to the
gauge, a restrictor limits air loss to 25
L/min.
2.7 STORAGE BAG
The standard bag is fabricated from
high visibility lightweight material. A
bag fabricated from black anti-static
material is also available. The fully
adjustable carrying strap permits the
wearer to wear the bag across the
chest or under the right arm.
