Regulation 350The engineering manager of a mine shall, in relation to that mine, ensure that(a) each air receiver has at least one reliable safety valve which is loaded in a manner that enables it to lift when the authorised pressure is exceeded;(b) the area available for discharge of air is of a nature that prevents accumulation of pressure greater than ten per cent above the authorised working pressure;(c) adequate precautions are taken to ensure that the load setting of each safety valve cannot be altered by an unauthorised person;(d) a stop valve is placed between a safety valve and a receiver which that safety valve serves;(e) where a safety valve is loaded by a weight or a spring acting on a lever, the load acts only at the extreme end of the lever;(f) each safety valve is constructed in a manner that enables it to rotate on its seat; and(g) each air compressor, other than an air compressor that discharge into an air receiver and cannot be closed off from the air, is provided with a pressure release valve or other automatic device capable of preventing an accumulation of pressure(i) greater than that for which the air compressor was designed or(ii) which is ten per cent above the pressure for which the system into which the air compressor discharges was designed, whichever is the lesser pressure.