Above is the boiler house at Chrysler Australia I mentioned being left in charge of at the tender age of 18 in a post above, taken mid-1970s. The 44 gallon drum on the handcart in the mid-ground gives an idea of scale.
Four Superior watertube boilers on the right. Gauge glass, pressure gauge, feedwater valves etc are on the platform at the top of the stairs on the boiler front, at second floor level.
Four Ingersoll Rand XL air compressor “L twins” on the left. Pistons 3 foot diameter on the vertical low pressure cylinder, about 18 inches on the high pressure horizontal cylinder.
The tea-break table was just to the left of the compressor control panel at the front of the pic. With four compressors running and four boiler forced draft fan intakes screaming like jet engines, it is not wonder I have wear hearing aids today. No mention of hearing protection back then. In fact it was actively discouraged lest you not hear a low water alarm or the beginnings of water hammer in one of those big steam pipes in the top right of the pic.
And below is the boiler house today. Repurposed as a yuppie microbrewery since the factory closed down in about 2008. My old boilerhouse mentors, all ex-navy and merchant marine men would have a quiet chuckle.