Scott Safety AFU 2, Руководство пользователя

Страница: 4 / 10

AFU 2 & AFU 4 3
SERVICING
In order to maintain optimum
performance, AFU 2 and AFU 4 must
be tested regularly and serviced at
scheduled intervals by personnel who
have completed a formal training
course and hold a current certificate
for the servicing and repair of Scott
Safety compressed-air airline breathing
apparatus.
Instructions for the replacement of
filter elements are contained within
this manual. All other instructions for
servicing are contained in the Scott
Safety Service Manual, copies of which
can only be obtained by registered
holders of a current certificate.
Your distributor or Training and
Technical Support Services will be
pleased to provide training course
details and quotes for service contracts.
Please see above for contact details.
The Scott Safety AFU is an Airline Filter
Unit designed to remove dirt particles,
water and oil from a breathable air
supply for use with compressed-air
airline breathing apparatus.
Scott Safety AFU is available in two
sizes, dependant upon the maximum
flow-rate required:
AFU 2 has a maximum flow capacity
of 13 litres per second (28 cubic feet
per minute) at 7 Bar G (100 psi G).
This unit can only be used to supply
a maximum of 3 wearers of demand
valve-fed apparatus or 2 wearers of
constant-flow apparatus.
AFU 4 has a maximum flow capacity
of 25 litres per second (53 cubic feet
per minute) at 7 Bar G (100 psi G).
This will allow up to 6 wearers (3 pairs)
of demand valve-fed apparatus or
4 wearers (2 pairs) of constant-flow
apparatus.
These units are available either mounted
in a tubular steel floor stand or in a box
enclosure suitable for wall-mounting.
All units work on the same principle,
utilising a three-stage filtration system.
The first stage AO Filter is a high-
efficiency coalescing filter for the
removal of dirt particles down to 1 x
10-6 metres in size.
The second stage AA Filter is a high-
efficiency coalescing filter for the
removal of oil mist/ water aerosol and
dirt particles down to 0.01 x 10-6 metres
in size with a maximum remaining oil
content of 0.01mg/m3.
An auto-drain valve is fitted to each
of the first and second stage filter
housings to allow water and other
liquids to be safely drained away.
The third stage AC Filter is an
absorption bed of activated carbon for
the removal of oil vapours and odours.
The air supply following this stage has
a maximum remaining oil content of
0.003mg/m3 at a temperature of 21
O
C.
The maximum unit inlet pressure is
TECHNICAL
DESCRIPTION