476 Issue date: 17 November 2006 14 of 80
7.1 The standard size combination of face mask and inner mask fitted to the PSS 7000 BA set is a
medium mask ‘M’ with a size ‘2’ inner mask – ‘M 2’.
7.2 If a seal cannot be achieved using this combination of face mask and inner mask, the wearer
(following a face fit arranged through OSG) will be given either the S (small), M (medium) or L
(large) face mask and 1, 2 or 3 inner mask combination as appropriate. This will be issued on a
personal basis and will be recalled on an annual basis for testing.
7.3 Personal issue face masks that become defective during weekend and or night duties are to be
removed from service and a POMS order raised. Personnel affected are to remain on the run and
allocated duties that do not involve the wearing of BA. This is however limited to the extent that a
minimum of two BA wearers (excluding the appliance commander but not excluding the driver)
are available on the appliance. Should BA wearer availability drop below two, an appliance will
then be considered ‘off the run’ (OTR) for BA.
7.4 The log book ‘remarks’ section should be annotated with the personal issue face mask
identification number when fitted as part of BA set testing when carrying out ‘A’ and ‘B’ tests.
A 28 day test can be carried out with a personal issue face mask see section 18 for details.
7.5 The FPS 7000 DPFM can be fitted with a P3 particulate filter to protect personnel from the effects
of exposure to airborne particulates.
7.6 The FPS 7000 face mask can be fitted with a hot cutting visor for cutting operations carried out by
fire rescue unit (FRU) qualified personnel, see Policy number 799 – Broco exothermic cutting
equipment – technical information.
BA face mask seal and the acceptable limits of facial hair.
7.7 The importance of obtaining an effective face mask seal should not be underestimated. Factors
such as individual face shape and size together with the presence of facial hair can affect face fit.
Poor face fit introduces the potential for inward leakage and exposure under extreme use,
together with the potential for outward leakage with consequent reduced duration.
7.8 The face mask seal has been defined by the manufacturer as that area of the face mask in contact
with the face. The inner mask is designed to manage the build-up of CO
2
in the face mask. The
face mask seal is made up of a ’double reflex seal’ that by design and function is considered
safety critical to the respiratory protection of the wearer. The area within the yellow lines
shows the defined limits of the double reflex seal (see image 389147 below).
LFB image 389147
7.9 For their own safety and in accordance with the manufacturer’s and Health and Safety Executive
(HSE) recommendations, all potential BA wearers are to maintain all areas of the face that may
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