In PneumaticCraft there currently are a few 'Vanilla' ways of generating pressure.

[prefix{l}]Tier one[prefix{}]

-[link{block/airCompressor}]Air Compressor[link{}]
-[link{block/liquidCompressor}]Liquid Compressor[link{}]

[prefix{l}]Tier two[prefix{}]

-[link{block/advancedAirCompressor}]Advanced Air Compressor[link{}]
-[link{block/advancedLiquidCompressor}]Advanced Liquid Compressor[link{}]
-[link{block/electrostaticCompressor}]Electrostatic Compressor[link{}]