This three-crank two-stage vertical reciprocating ammonia compressor was built in 1918 by the Peterborough-based Peter Brotherhood Ltd and installed at the No.2 plant in the Billingham manufacturing plant. The compressor is approximately 7.6 metres tall, 2 metres wide, and 1 metre long. The compressor has a bottom and lower section connected by a set of three pistons. On one side of the compressor, there is a pressure gauge measuring in pounds per square inch, and an attached DELVAC mechanical lubrication system built by the Vacuum Oil Company Ltd from London. The compressor has the logo of the Peter Brotherhood Ltd company, as well as the company name and located marked on the sides of the machine. Three-crank two-stage vertical reciprocating compressor 1918
