First, define the core requirements
Pressure and flow
Pressure: According to the requirements of the terminal equipment (such as tools, processes), usually 7-14bar, special needs to be customized.
Flow rate: Calculate the actual gas consumption and reserve 10% (unit: m³/min) to avoid insufficient pressure or excessive waste of energy.
Application scenario
Fixed scenario: Power frequency/frequency conversion screw machine (such as G/GA series) is preferred.
Mobile scenario: Select the XAS/XRV series, paying attention to the pressure range (4-13bar or high wind pressure).
Clean demand: food, medicine and other industries need oil-free models (such as AQ/SF series).
Environmental condition
Space limitation: Vertical or compact design (such as SF scroll).
Power supply: No electricity environment choose diesel driven mobile models.
Climate factors: the cold areas in the north avoid water-cooled models.
Second, model and technology selection
No oil vs. spray oil
Oil-free: Meets high cleanliness requirements (CLASS 0 certification), but at a higher cost (e.g. ZT/AQ series).
Oil injection: cost-effective, need to be equipped with post-treatment equipment oil removal (such as GA/G series).
Driving mode
Frequency conversion (VSD) : suitable for scenarios with large gas fluctuations, saving more than 30% (such as GA VSD + series).
Power frequency: fixed speed, suitable for stable gas (such as G series).
Two-speed (FLX) : Balance cost with energy savings for moderately fluctuating demand.
Mobile model
Small (7-10.3bar) : 8 series, suitable for sandblasting and concrete work.
Large (15-35bar) : high wind pressure model, used in mining and oil projects.
Battery drive: Environmentally friendly, suitable for low noise or power inconvenience scenarios.
Third, energy efficiency and cost considerations
Total Cost of Ownership (TCO)
Initial investment: frequency conversion > power frequency, no oil > oil injection.
Operating costs: Frequency conversion models have lower electricity costs, and oil-free models reduce oil treatment costs.
Maintenance costs: Choose a model with a long maintenance period and easy to replace parts (such as SF scroll).
Energy efficiency class
IE3/IE4 motors are preferred, and permanent magnet frequency conversion models are more efficient (such as GA VSDs series).
Iv. Other key factors
Noise control
Low noise models (such as the SF Series 53 dB) are suitable for office or residential areas.
extensibility
Reserve room for future production increase, consider modular design or parallel scheme.
After-sales service
Choose a brand with a well-localized service network to ensure a quick response.