Applications
- Tanks
- Treaters
- Process Vapors
Performance
- Suction: 0-50 psi (0-350 kPa)
- Discharge: 5-600 psi (30-4000 kPa)
- Volume: 70-1000 mcfd (2-30 e³m³)
- Configuration – Skid with building, Trailer, Small enclosure
- Driver – Natural Gas engine, Electric motor
- Compression Element – Blower, Dry vane, Oil flooded screw, Piston
Features/Options
- Extremely sensitive LP recycle; 100% turn down at 8’’ H2O
- Sweet/Sour
- Annunciator
- VFD
- SS Plumbing
- After Cooler
- Condensate pump
- East access to service points
- CSA
Vapor Recovery Compression Techniques
Dry Vane
- Capital cost – Medium
- Running cost – Low
- Vacuum capable
- Low vibration
- Case material – Ductile iron
- Optional zero emission mechanical seal
Performance
- Low pressure models:
- 0-4600 mcfd (130 e³m³)
- 0-80 psi(550 kPa)
- High pressure models:
- 0-1150 mcfd (30 e³m³)
- 0-150 psi (1000 kPa)
Dry vanes are extremely tolerant of dirty / sour gas. The materials are MRO compliant and bearings are not exposed to process gas. The wear part is an inexpensive composite blade that can be changed in a few minutes. Typical pressures are 8’’-10’’ H2O suction and 50 – 60 psi discharge. View our CV20 Vane Compressor CV20
Oil Flooded Screw
- Capital cost – Medium
- Running cost – Medium
- Low vibration
- Case material – Grey iron
Performance
- Suction: Vacuum – 70 psi (480 kPa)
- Discharge: 50 – 350 psi (340 – 2, 400 kPa)
- Flow: 100 – 2000 mcfd (3-60 e³m³)
Oil flooded screws are a economical method of moving high volumes of gas. The biggest drawback in service with wet dirty gas is the potential for oil contamination. Use of a POA (poly glycol oil) which resists dilution by hydrocarbons and high oil temperatures which vaporize heavier hydrocarbons are commonly used to mitigate the oil contamination issue. Contaminated oil generally results in catastrophic failure of the compression element. View our Oil Flooded Rotary Screw Compressors
Blower
- Capital cost – Low
- Running cost – Low
- Low vibration
- Case material – Grey iron (optional stainless)
Performance
- Suction: Vacuum – 15 psi (100 kPa)
- Discharge: 0 – 30 psi (200 kPa)
- Flow: 100 – 5000 mcfd (3 – 140 e³m³)
Blowers are the most economic solution for low pressure ratios (<1). Large volumes of gas can be moved relatively inexpensively and with little maintenance. Unlike the other techniques a blower should be operated close to the design speed making a VFD not overly useful for capacity control.
Piston
- Capital cost – High
- Running cost – High
- High vibration
- Cylinder material – generally grey iron
Performance
- Suction: 0 – 80 psi (550 kPa), can be higher
- Discharge: 40 – 4000 psi (275 – 2800 kPa)
- Flow: 100 – 3000 mcfd (3 – 85 e³m³)
Piston or reciprocating compressors are the most common method of compressing gas in the oil and gas industry and can be used in almost any application. Their high capital and running costs and heavy base required to resist vibration forces generally restricts their use to pressures that are higher than can be achieved with other techniques