Roots blowers specification: What do you need to know before buying?

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4. Thermal forming applications

5. Fish farm and aquaculture

6. ULV fogging and more

Things to consider when choosing a roots blower for your application

1. Air volume: The air volume is the gas the roots blowers delivers per unit of time. In some applications like cement transportation and boiler return roots blowers are only auxiliary equipment, and it is not possible to know the required air volume parameters one can provide the delivery volume per unit time like conveying 15 tons of cement per hour. Thus, the air volume parameter is one aspect that must be considered when choosing a roots blower.

2. Pressure: It refers to the outlet pressure and the pressure the roots blower needs to overcome. Roots blower is a positive displacement blower, and the pressure depends on the front pipe and atmospheric pressure, known as back pressure. The pressure gauge shows the same pressure, and if the pressure exceeds the rated pressure, the roots blower will be in an overpressure condition, and the motor will burn.

3. Rotate speed: The rotation speed affects two aspects — air volume and service life of the blower. When all the parameters are the same except the rotation speed, the higher the speed, the larger the blower volume. Blowers with high speed will have a shorter service life. Consider rotating speed when choosing roots blowers for your application.

4. Transport medium: The roots blowers cannot transport all types of gas like high acidity gas and alkaline and flammable and explosive gases. The potent corrosive gases damage the roots blowers easily. Choose the roots blowers as per the air volume and pressure; there are specific needs for transport medium.

5. Sealing method: Another aspect one must consider is the sealing method. The sealing method of roots blowers is labyrinths. Unique sealing methods like pistons, rings, and mechanical seals are required when special gases are transported. The difference in the sealing method will cause price fluctuations, and it is also one of the necessary parameters for selection.

Wrap up

When choosing the best roots blowers for your application, it is essential to consider the above parameters and choose the apt roots blowers in sync with your budget and needs.

The best roots blower manufacturers have high standards and best quality roots blowers at a cost-effective price.

A thorough analysis of your installation and application is key to selecting the right technology, and there will undoubtedly be one or more aspects might take precedence over others. For example, a smaller space for the blower might dictate choosing a technology with a smaller footprint and lower noise levels, while an application that requires lower energy costs may be best suited for an energy-efficient technology that has a higher initial cost. Key factors that should be taken into consideration include:

Flow and pressure

A correctly sized blower installation will help to achieve a more energy-efficient process. For instance, in a situation where compressor turndown is employed as the low-pressure source, replacing the compressor with an air blower to deliver 0.3 and 1.5 bar(g) air will result in significant savings. For every 1 bar(g) the air is compressed above the actual demand, 7% of energy is wasted.

Application conditions

Site conditions have a bearing on blower choice. For example, dusty environment or hot humid site for a blower installation might dictate the choice of a technology offering a reliable positive displacement screw, lobe blower or multi stage centrifugal to provide a reliable source of low pressure air with no much of sensitivity to dust or high ambient temperatures. On the other hand, the application criterion of lower energy costs may be best met by a more energy-efficient technology that comes with a higher capital cost.

Initial capital cost vs. greatest ROI

The cheapest solution to purchase does not automatically result in the lowest operating costs. It is therefore advisable not only to consider the investment costs in the design phase, but also to keep an eye on the necessary expenses over the entire life cycle of the machines to get the maximum ROI.

Operating noise levels

A feature of the latest generation of low-pressure blowers is intelligent baffle and canopy design that provides reduced sound levels down to 72dB(a) for an improved working environment. Consequently, installation costs are reduced as there is no need for the provision of noise-insulated rooms and doors. 

Service and lifetime support

When it comes to routine maintenance and service support, some older blower technologies may require units to be serviced, repaired or re-furbished offsite. Advanced design developments in the latest oil-free, low-pressure blowers now sees the inclusion of low maintenance components, extended on-site service intervals, each blower technology need to have routine services and checkups , however the each technology design and mechanism differs on the number of consumables and service periods  and the benefits of lifetime customer support plans.

Comparative performances

It pays to check the vital statistics. As an example, the tri-lobe rotors incorporated into the latest generation of low-noise, low-vibration, low-pulsation blowers are capable of sweeping nearly six times the volume of air in a single revolution compared to their belt-driven, twin-lobe predecessors. On average, this older technology experiences 5% - 7% more transmission losses.  

An important advantage of the direct-drive, oil-free, rotary screw blowers is wide turndown, especially on models with integrated inverter drives. This allows the units to match the airflows to the daily and seasonal variations in the effluent inflow, resulting in additional energy savings. In order to cope with fluctuations in air demand, screw blower technology can operate from 100% capacity to 25% with very little change in specific power requirement.

Are you interested in learning more about buy roots blower? Contact us today to secure an expert consultation!