Ball bearing

Thrust bearing

Sleeve bearing

Open ball bearing

2 - 3 m / sec

5 - 7 m / sec

7 - 9 m / sec

9 - 10 m / sec

150 psig

250 psig

350 psig

450 psig

Eliminates compressor

High energy efficiency

Low energy efficiency

Current drawn is high

Hand shut off valve

Automatic expansion valve

Thermostatic expansion valve

Thermal electric expansion valve