Page 310 - Compression Machinery for Oil and Gas

Screw Compressors Chapter 6 295

of speed DGS Continued
Hydrogen circulation range molecular weight Variable motor 40%–100% Double 4.2–28

5 Large – 21 30

Hydrogen-sulfide discharge wet temperature driver speed seal ring

4 High H 2 S-mix Fixed – Carbon 37.1 1.6 40
Injection weight

Liquid discharge molecular

Without and suction low motor speed DGS

Compressors 3 Hydrogen High pressure, Fixed – Double 4.08 35.5 16

Screw boil Ethylene suction temperature speed Oil-cooled mechanical

Dry 2 off Low Fixed motor – seal 28.02 1.04 2103
Single-Stage speed for

of 1 Butadiene High molecular weight Fixed motor Only N 2 -start-up Oil-cooled mechanical seal 51.7 1.5 45
Examples weight (°C)

6.6 feature injection type seal pressure
TABLE Nos. Process Special Driver Liquid Shaft Molecular (kg/kmol) Suction abs) (bar Suction temperature