A reciprocating surroundings compressor is a positive displacement compressor that runs on 
the crankshaft-driven piston and cylinder to compress the atmosphere. … A Piston Air Compressor two-stage compressor includes an additional step where in fact the surroundings is compressed by another, smaller piston to a pressure of up to 175 PSI.
Like a little internal combustion engine, a typical piston compressor has a crankshaft, a connecting rod and piston, a cylinder and a valve head. … As the piston techniques down, a vacuum is created above it. This enables outside surroundings at atmospheric pressure to push open the inlet valve and fill the region above the piston.
