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Product Description
Fixed-speed screw air compressor is a screw air compressor that is driven by a power supply of 50Hz/60Hz and has a constant motor speed. Its operating mode is: Fixed-speed operation: The motor always runs at the rated speed (such as 2900rpm/50Hz) and the exhaust volume is constant.Loading/unloading control: Controlled by a pressure switch, unloading (no-load operation) when the set pressure is reached, and reloading when the pressure is lower than the set pressure.
Product Features
(1) Simple structure and high reliability
No complex components such as inverters and permanent magnet motors, few failure points, and low maintenance costs.
Applicable to harsh environments (high temperature, high dust, etc.), with strong anti-interference capabilities.
(2) Low initial investment cost
Compared to variable frequency models, industrial frequency machines are cheaper and suitable for users with limited budgets or low energy-saving requirements.
(3) Suitable for stable gas conditions
In scenarios with stable gas consumption and high load rates (>80%), the energy efficiency is close to that of variable frequency machines.
(4) Easy maintenance
Constant speed operation makes the lubrication system and cooling system stable, and the maintenance cycle is relatively fixed.
Common wearing parts (air filter, oil filter, lubricating oil) are easy to replace, and the technical threshold is low.
（5) Strong instantaneous air supply capacity
The motor starts directly and can quickly respond to short-term high-load demands (such as sudden increase in gas-using equipment) when running at full speed.
Applicable industries
Manufacturing: injection molding, casting, metal processing (stable high load).
Mining/Construction: Drilling rigs and shotcrete equipment (harsh environments requiring high reliability).
Small and medium-sized enterprises: Simple gas needs and limited budgets
FAQ
Q1. What is a fixed-speed screw compressor?
A: A fixed-speed screw compressor is a positive displacement compressor that compresses gas through the rotation of two intermeshing screw rotors (male and female). Its speed is fixed (directly driven by a motor), and the output volume is constant. The volume is adjusted through load/unload control or air throttling.
Q2. How is the volume adjusted in a fixed-speed screw compressor?
Load/Unload Control (Load/Unload):
Load: The intake valve is fully open, and the compressor operates at full load.
Unload: The intake valve is closed, and the compressor idles (maintaining only internal circulation).
Air throttling: A valve is used to restrict the intake volume, reducing the actual exhaust volume (but this reduces efficiency).
Q3. Daily Maintenance Tips
Lubricating oil: Change regularly (recommended every 2000-4000 hours, depending on the manufacturer's instructions).
Air filter: Clean every 500 hours and replace every 2000 hours.
Oil filter: Replace every 1000-2000 hours.
Cooling system: Clean the radiator/cooler regularly.
Q4. How to choose a model?
Air volume requirement: Select based on maximum air volume (allow a 10%-20% margin).
Operating pressure: Match the requirements of back-end equipment (usually 0.7-1.0 MPa).
Environmental conditions: For high-temperature environments, select a model with greater cooling capacity.
Product Description
Fixed-speed screw air compressor is a screw air compressor that is driven by a power supply of 50Hz/60Hz and has a constant motor speed. Its operating mode is: Fixed-speed operation: The motor always runs at the rated speed (such as 2900rpm/50Hz) and the exhaust volume is constant.Loading/unloading control: Controlled by a pressure switch, unloading (no-load operation) when the set pressure is reached, and reloading when the pressure is lower than the set pressure.
Product Features
(1) Simple structure and high reliability
No complex components such as inverters and permanent magnet motors, few failure points, and low maintenance costs.
Applicable to harsh environments (high temperature, high dust, etc.), with strong anti-interference capabilities.
(2) Low initial investment cost
Compared to variable frequency models, industrial frequency machines are cheaper and suitable for users with limited budgets or low energy-saving requirements.
(3) Suitable for stable gas conditions
In scenarios with stable gas consumption and high load rates (>80%), the energy efficiency is close to that of variable frequency machines.
(4) Easy maintenance
Constant speed operation makes the lubrication system and cooling system stable, and the maintenance cycle is relatively fixed.
Common wearing parts (air filter, oil filter, lubricating oil) are easy to replace, and the technical threshold is low.
（5) Strong instantaneous air supply capacity
The motor starts directly and can quickly respond to short-term high-load demands (such as sudden increase in gas-using equipment) when running at full speed.
Applicable industries
Manufacturing: injection molding, casting, metal processing (stable high load).
Mining/Construction: Drilling rigs and shotcrete equipment (harsh environments requiring high reliability).
Small and medium-sized enterprises: Simple gas needs and limited budgets
FAQ
Q1. What is a fixed-speed screw compressor?
A: A fixed-speed screw compressor is a positive displacement compressor that compresses gas through the rotation of two intermeshing screw rotors (male and female). Its speed is fixed (directly driven by a motor), and the output volume is constant. The volume is adjusted through load/unload control or air throttling.
Q2. How is the volume adjusted in a fixed-speed screw compressor?
Load/Unload Control (Load/Unload):
Load: The intake valve is fully open, and the compressor operates at full load.
Unload: The intake valve is closed, and the compressor idles (maintaining only internal circulation).
Air throttling: A valve is used to restrict the intake volume, reducing the actual exhaust volume (but this reduces efficiency).
Q3. Daily Maintenance Tips
Lubricating oil: Change regularly (recommended every 2000-4000 hours, depending on the manufacturer's instructions).
Air filter: Clean every 500 hours and replace every 2000 hours.
Oil filter: Replace every 1000-2000 hours.
Cooling system: Clean the radiator/cooler regularly.
Q4. How to choose a model?
Air volume requirement: Select based on maximum air volume (allow a 10%-20% margin).
Operating pressure: Match the requirements of back-end equipment (usually 0.7-1.0 MPa).
Environmental conditions: For high-temperature environments, select a model with greater cooling capacity.
