KIMAIR BOV Oil-free Inverter Screw Blowers

The BOV series is a high-efficiency oil-free blower developed by KIMAIR using advanced twin-screw technology. It abandons the contact-based compression principle of traditional Roots blowers, employing a non-contact meshing screw airend and intelligent Variable Speed Drive (VSD). It delivers high flow, pulse-free clean air at low pressure (typically <0.5 BarG). It completely solves the industry pain points of Roots blowers—low efficiency, high noise, and frequent maintenance. It is a revolutionary product for energy-saving upgrades and process improvements in applications like wastewater treatment, aquaculture, and pneumatic conveying.

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Energy-efficient and Eco-friendly Oil-free Blower Solutions

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| Product Details

Video Tutorial

KIMAIR BOV Oil-free Inverter Screw Blowers Principle Explanation Video

KIMAIR Core Advantages

High Efficiency & Energy Saving

- Optimized screw profile, minimal internal leakage, high adiabatic efficiency, saving 20%-35% energy compared to traditional Roots blowers.
100% Oil-Free Air

- Screw structure with Timing Gear drive ensures absolutely Oil-Free Compressor output air, suitable for sensitive environments.
Quiet & Stable Operation

- Non-contact compression results in Noise Level and vibration far lower than Roots blowers, greatly improving the working environment.
Intelligent Inverter Control

- Automatically adjusts motor speed based on actual air demand, avoiding wasteful blow-off and further enhancing energy savings.
Long Maintenance Interval

Simple and reliable structure, long design life for core components, less maintenance work, low overall cost.

Technical Specifications

Model	Motor Power		Pressure（MPa）	Free air delivery（m³/min）	Lub. Oil（L）	Outlet （inch/mm）	Weight (kg）	Dimensions （mm）
Model	（kW）	（Hp）	Pressure（MPa）	Free air delivery（m³/min）	Lub. Oil（L）	Outlet （inch/mm）	Weight (kg）	Dimensions （mm）
BOV30/1.2	22	30	0.12	9.0	DN100	20	1000	160010371380
BOV30/1.5	22	30	0.15	8.1	DN100	20	1000	160010371380
BOV50/1.2	37	50	0.12	16.5	DN150	30	1100	160011001750
BOV50/1.5	37	50	0.15	12.5	DN150	30	1100	160011001750
BOV60/1.2	45	60	0.12	21.9	DN150	30	1200	160011001750
BOV60/1.5	45	60	0.15	16.3	DN150	30	1200	160011001750
BOV75/1.2	55	75	0.12	29.0	DN200	45	1400	180011501710
BOV75/1.5	55	75	0.15	22.3	DN200	45	1400	180011501710
BOV100/1.2	75	100	0.12	41.3	DN200	50	2000	202014002000
BOV100/1.5	75	100	0.15	32.0	DN200	50	2000	202014002000
BOV120/1.2	90	120	0.12	48.0	DN250	50	2250	220015002000
BOV120/1.5	90	120	0.15	40.9	DN250	50	2250	220015002000
BOV150/1.2	110	150	0.12	62.0	DN250	50	2300	230016002000
BOV150/1.5	110	150	0.15	51.0	DN250	50	2300	230016002000
BOV220/1.2	160	220	0.12	85.3	DN300	50	4000	265017002400
BOV220/1.5	160	220	0.15	67.6	DN300	50	4000	265017002400

Application Scenarios

- Municipal & Industrial Wastewater Treatment: Biological aerobic treatment in aeration tanks, improving efficiency and reducing energy consumption.

- Aquaculture: Bottom aeration for fish and shrimp ponds, increasing stocking density and survival rate.

- Pneumatic Conveying: Dilute phase conveying of powder and granular materials, clean and pollution-free.

- Printing, Cigarette Industry: Paper conveying, drying processes.

- Other applications requiring low-pressure, high-volume, clean air.

Customer Frequently Asked Questions (FAQ)

Q: Is it complicated to retrofit an existing Roots blower with the BOV screw blower?

A: The retrofit is simple. BOV's inlet and Outlet Ports are typically designed to match standard Roots blower dimensions, requiring minimal piping changes. The main considerations are the installation location and power supply for the inverter. KIMAIR provides detailed retrofit plan drawings and technical support for quick replacement, minimizing downtime.

Q: What is the specific advantage of VSD control in wastewater treatment aeration?

A: The advantages are significant and direct:

1) Aeration on Demand: Adjusts air volume based on water quality, flow rate, and Dissolved Oxygen (DO) concentration, eliminating power waste from over-aeration.

2) Stable DO: Precise air volume control helps the biological tank maintain the optimal DO value, improving treatment efficiency and stability.

3) Soft Start/Stop: Reduces impact on the power grid and aeration system components (like membranes), extending equipment life.

Why choose the KIMAIR BOV Series?

- Blower Technology Innovator: Challenges and replaces traditional Roots technology with advanced screw technology, delivering a leap in efficiency and reliability.

- Tailored Energy Savings for Environmental Industry: Directly addresses the pain point of high energy consumption in wastewater treatment plants, offering rapid payback.

- Perfect Combination of Cleanliness & Quietness: Ensures pure process media while significantly improving the plant and surrounding environment.

- Easy Smart Management: VSD provides a natural interface for integration into plant-wide Smart Control Systems, aiding the development of smart water utilities.