**Detailed explanation of high-pressure Roots blower**
**High pressure Roots blower is a special type of Roots blower designed specifically for conveying high-pressure gases (usually>49kPa, up to 200kPa), suitable for industrial scenarios such as sewage treatment, pneumatic conveying, and vacuum packaging.
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**1. Characteristics of high-pressure Roots blower**
**(1) Wide pressure range**
-* * Standard pressure * *: 9.8~98 kPa (0.1~1 bar)
-* * High pressure model * *: up to * * 98~200 kPa (1~2 bar) * * (some two-stage turbocharged models can be higher)
**(2) Stable air volume**
-Adopting the principle of * * volumetric * *, the air volume is basically not affected by pressure, making it suitable for situations that require * * constant flow * * (such as aeration).
**(3) Sturdy structure**
-Adopting high-strength cast iron/stainless steel casing, it is resistant to high pressure and wear.
-Some high-pressure models use * * dual oil tank lubrication * * or * * water-cooled structure * * to ensure long-term operational stability.
**(4) Applicable industries**
-Wastewater treatment (aeration tank oxygenation)
-* * Pneumatic conveying * * (fly ash, cement, grains)
-Vacuum Packaging (Food, Electronics Industry)
-Chemical gas transportation (such as inert gases such as CO, N, etc.)
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**2. High pressure vs ordinary Roots blower**
|* * Comparison item * * | * * Ordinary Roots blower * * | * * High pressure Roots blower * *|
|------------------|-------------------------|-------------------------|
|* * Pressure range * * | 9.8~49 kPa (0.1~0.5 bar) | 49~200 kPa (0.5~2 bar)|
|* * Impeller design * * | Conventional three blade/two blade type | High precision three blade type (better sealing)|
|* * Bearings/Gears * * | Ordinary bearings | Heavy duty bearings+reinforced gears|
|* * Cooling method * * | Air cooling is the main method | Some models support water cooling|
|* * Price * * | Lower | Higher (about 20-50 more expensive)|
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**3. Selection Guide for High Pressure Roots Blowers**
**(1) Key parameters**
-* * Airflow (m3/min) * *: Select according to process requirements (such as sewage treatment, which generally requires 3-50 m3/min).
-* * Pressure (kPa) * *: Pipeline resistance and liquid level depth (such as the required pressure determined by the water depth of the aeration tank) need to be considered.
-Motor power (kW): The higher the pressure, the greater the required power (e.g. 7.5 kW for 50 kPa and 15 kW for 100 kPa).
**(2) Selection steps**
1. * * Determine the air volume * * (e.g. sewage treatment is calculated based on an air to water ratio of 5:1).
2. * * Calculate pressure * * (pipeline loss+liquid level pressure+residual 10).
3. * * Select the model * * (refer to the manufacturer's performance table, such as Changsheng CSR-150).
4. * * Consider additional configurations * * (muffler, vibration isolation device, frequency conversion control).
**(3) Recommended brand**
|* * Brand * * | * * Representative Model * * | * * Pressure * * | * * Features * *|
|---------------|----------------|-------------|-----------------------------|
|* * Shandong Changsheng * * | CSR-200 | 98 kPa | High market share and excellent cost-effectiveness|
|* * Shandong Changsheng * * | CSR-300 | 58.8 kPa | Dual stage turbocharging, suitable for ultra-high pressure requirements|
|Zhangqiu Changsheng L93WD 98 kPa Export type, strong durability|
|* * * * | Delta Blower | 200 kPa | Energy saving, suitable for high-end industries|
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**4. Frequently Asked Questions (FAQ)**
**Q1: Can high-pressure Roots blower replace air compressor**
**Cannot * *, Roots blower * * pressure is only 2 bar * *, while air compressor can reach more than 10 bar.
**Q2: Does the high-voltage model consume more electricity**
**Yes, the higher the pressure, the greater the motor power (for example, 100 kPa consumes about twice as much electricity as 50 kPa).
**Q3: How to reduce the noise of high-pressure Roots blower**
method:
-Install a silencer (both inlet and outlet can be installed).
-Adopt * * soundproof cover * * or shock-absorbing foundation.
-Choose a low-noise three blade fan.
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**5. Maintenance and upkeep**
-Daily inspection: oil level, vibration, and abnormal noise.
-* * Every 3 months * *: Replace lubricating oil and clean filters.
-* * Annual * *: Check the wear of gears and bearings.
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**Summary**
-High pressure Roots blower is suitable for conveying medium and high pressure gases at 49-200 kPa, with stable airflow but high noise.
-* * Selection key * *: Calculate accurate air volume and pressure, and choose a reliable brand (such as Changsheng).
-* * Maintenance points * *: Regularly change oil, check sealing, and avoid overpressure operation.
If specific model parameters or operating conditions need to be matched, it is recommended to directly consult the manufacturer for * * performance curve * * and * * selection plan * *.
