• pure gases – Methane (CH4) – Ethane (C2H6) – Propane (C3H8) – Butane (C4H10) – Nitrogen (N2) – Carbon dioxide (CO2)
• Sewage gas (typical composition) – Methane (65%) – Carbon dioxide (35%) Hydrogen sulfide up to 2000 ppm (or more) and some nitrogen, oxygen, ammonia, etc.
• Landfill gas (typical composition) – Methane (50%) – Carbon dioxide (33%) – Nitrogen (15%) – Oxygen (2%) Traces of hydrogen sulfide, fluorine and chlorine compounds, also some ethane, propane, hydrogen, carbon monoxide, etc.
• Natural gas type L (typical composition) – Methane (81.8%) – Ethane (2.8%) – Propane (0.4%) – Butane (0.2%) – Nitrogen (14.0%) – Carbon dioxide (0.8%)
• Natural gas type H (typical composition) – Methane (93.0%) – Ethane (3.0%) – Propane (1.3%) – Butane (0.6%) – Nitrogen (1.1%) – Carbon dioxide (1.0%) Also some higher hydrocarbons, helium, hydrogen sulfide, carbon dioxide, argon, etc.
• Mine gas (typical composition) – Methane (30 – 90%) – Air (remainder) The concentration of methane in the mine gas depends on the atmospheric pressure and whether coal is mined in the exhausted area.
• Biogas – Methane (60%) – Carbon dioxide (35%) – Water (3%) – Nitrogen (1%) Also some Oxygen and ammonia

AVISTA LLC officially represents Wittig Industrial Systems, a German manufacturer which provides engineered solutions for vacuum and pressure. Wittig rotary vane compressors and vacuum pumps are outstanding performers in terms of reliability and economy of operation for any application and in any industry.

WITTIG’s high quality custom engineered equipment is suitable for a myriad of applications to customers around the world. WITTIG has a well-earned reputation as a highly respected global manufacturer of technologically advanced vacuum and pressure solutions, delivering exceptional value, reliability and performance to all levels of industry.

WITTING’s global expertise, unrivalled and extensive range of industry leading products, and fast, responsive and locally based service teams ensure that WTTING is able to develop innovative, high quality, reliable and energy efficient industrial equipment, technologies and services with the lowest life-cycle costs.