The Roots blower 250 type is a common positive displacement fan, belonging to a specific specification model in the Roots blower series, widely used in industrial gas transportation, pressurization, and stirring scenarios. Here is a detailed introduction about this model:
1、 Model meaning
250 ": usually refers to the exhaust port diameter of the fan (in millimeters, i.e. 250mm), and may also represent the impeller diameter or design flow rating of the fan (specific reference to manufacturer standards). The naming conventions for models may vary slightly among different manufacturers, but core parameters such as flow rate and pressure will be clearly marked in the technical documentation.
2、 Core parameters
The performance parameters of the Roots blower 250 model may vary depending on the manufacturer and design, but generally include the following ranges:
Flow range: approximately 5-30 m3/min (depending on speed and impeller design).
Pressure range: 0.1-0.98 bar (gauge pressure), can meet low to medium pressure requirements.
Speed: Usually between 500-1500 rpm, high-speed models have higher flow rates.
Power: The motor power ranges from several kilowatts to tens of kilowatts and needs to be matched according to actual working conditions.
Noise level: about 80-90 dB (A), noise reduction measures such as soundproof covers and mufflers need to be taken.
3、 Structural characteristics
Double bladed wheel design: Two three bladed impellers rotate in opposite directions, creating a volume change to achieve gas delivery without internal compression process.
Synchronous gear transmission: By using gears to maintain constant impeller clearance, leakage is reduced and efficiency is improved.
Forced gas transmission: Changes in outlet pressure do not affect flow rate, making it suitable for scenarios that require stable flow.
Material selection:
Impeller: cast iron, stainless steel, or special alloys (such as when dealing with corrosive gases).
Shell: Cast iron or welded steel plate, surface anti-corrosion treatment.
Bearings: Rolling bearings or sliding bearings require regular lubrication.
4、 Application Fields
Water treatment: Aeration and oxygenation promote the decomposition of organic matter by microorganisms in wastewater.
Pneumatic conveying: conveying powders and particles (such as cement, grains, plastic particles).
Vacuum system: used as a vacuum pump to extract gas or steam.
Chemical industry: Transport corrosive or flammable and explosive gases (requiring explosion-proof design).
Power industry: Boiler combustion air supply to improve combustion efficiency.
Food and medicine: Oil free design models are used for clean gas transportation (such as fermentation tank ventilation).
5、 Key selection points
Flow and pressure: Determine the required flow and pressure according to process requirements, leaving a margin of 10-20.
Gas properties:
Corrosivity: Choose stainless steel or corrosion-resistant coating.
Dust content: Install a filter or choose a wear-resistant design.
Temperature: High temperature gases require cooling or special sealing.
Installation environment:
Space limitations: Consider fan size and pipeline layout.
Noise requirements: Install mufflers or soundproof rooms.
Energy efficiency and maintenance:
Prioritize motor and frequency conversion control to reduce energy consumption.
Regularly check gear oil, bearing lubrication, and belt tension.
6、 Common Problems and Solutions
Insufficient traffic:
Check if the imported filter is clogged.
Confirm if the belt is slipping or if the motor speed is insufficient.
High temperature:
Clean the heat sink or add a cooling fan.
Check if the lubricating oil has deteriorated or is insufficient.
Abnormal noise:
Tighten the anchor bolts and check the gear meshing.
Replace worn bearings or impellers.
7、 Market brand recommendation
Brand: (Shandong Zhangqiu Blower), etc., with high cost-effectiveness and a complete service network.
Brands: Hitachi from Japan, USA, etc., with advanced technology, suitable for high-end needs.
8、 Maintenance suggestions
Daily inspection: oil level, temperature, vibration, and noise.
Regular maintenance:
Replace the lubricating oil every 3-6 months.
Check the impeller clearance and gear wear annually.
Spare parts reserve: Vulnerable parts (such as belts, oil seals, bearings) need to be prepared in advance.
If you need specific technical parameters or quotations for a particular model, it is recommended to directly contact the manufacturer or distributor and provide detailed operating conditions (such as flow rate, pressure, gas composition) to obtain accurate selection solutions.
