Industrial Screw Blower 4-7.5kW Oil Free Air Compressor for Wastewater Treatment

Product Details:

Place of Origin:	CHINA
Brand Name:	B-TOHIN
Certification:	ISO9001 / ISO14001
Model Number:	BLG109A

Payment & Shipping Terms:

Minimum Order Quantity:	1 set
Packaging Details:	EXPORT WOODEN CASE
Delivery Time:	30 WORKING DAYS
Payment Terms:	L/C, T/T
Supply Ability:	30 SETS PER MONTH

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Detailed Product Description

Pressure:	40-100Kpa	Air Flow:	1.4/min-2.9 M³/min
Package:	Wooden Case	Cooling Type:	Oil
Motor Power:	4-7.5 KW	Speed:	2000-3000 Rpm
Port Dia.:	DN65	Advantages:	Low Cost , Low Noise,energy Saving, PLC Control

Product introduction

BLG Permanent Magnet Variable Frequency Screw Blower is an advanced compressed air system designed for energy efficiency and precise control in industrial applications. This blower combines cutting-edge motor and drive technology with robust screw compression, making it ideal for industries prioritizing energy savings, operational flexibility, and reliability. Its design addresses modern needs for sustainability and cost-effective performance in dynamic environments.

Industrial Screw Blower 4-7.5kW Oil Free Air Compressor for Wastewater Treatment Working Principle

1. Suction starts
2. Suction ends and compression begins
3. During compression
4. Compression ends and air discharge begins
Industrial Screw Blower 4-7.5kW Oil Free Air Compressor for Wastewater Treatment Features

Energy saving
Thanks to the adiabatic compression principle, the total efficiency of oil-free screw blower exceeds 75%, saving more than 20%-35% energy than the Roots blower. The blower is featured with higher discharge pressure and lower pressure pulse.

Low noise
The aerodynamic noise of the screw rotor is very small, and the smooth output eliminates the sudden release of internal air, and the wavy inlet and air outlet minimize airflow fluctuations, so the noise is less than that of traditional blowers.

Intelligent
Intelligent PLC control, remote control and various communication methods are convenient for operation and management

Low cost
The optimized structural design enables the durability of the product with less consumption. Also no special infrastructure is required due to the smooth running and small load of the unit.

Parameters

Self- lubricationⅡ	Pressure Range	40-100KPa	Airflow Range	1.4-172m³/min	Power Range	4-280kw
No.	Model	Diameter	Exhaust Pressure (KPa)	Airflow (m³/min)	Motor Power (Kw)	Main Body Speed (rpm)
1	BLG109A	DN65	40-100	1.4-2.9	4-7.5	2000-3000
2	BLG109B	DN65		2.2-4.8	4-11
3	BLG127B	DN100		3.9-8.7	5.5-18.5
4	BLG140B	DN100		6.4-12.3	7.5-22
5	BLG160A	DN150		7.1-15.1	7.5-30
6	BLG160B			10-20	11-37
7	BLG172B			11.5-25	15-45
8	BLG202A	DN200		17.5-31.7	18.5-55
9	BLG202B	DN200		22.8-41	22-75
10	BLG240A	DN250		27.4-47.7	30-90	1800-3000
11	BLG240B	DN250		34.5-60	37-110
12	BLG275A	DN300		40.7-75.5	37-132
13	BLG275B	DN300		47.4-90	45-160
14	BLG315A	DN350		67.6-116.7	75-185
15	BLG315B	DN350		76.4-132	75-220
16	BLG343A	DN350		73-136	75-200
17	BLG343B	DN450		94-172	90-280

Description of blower parts

Shaft screw blower main body	high efficiency profile rotor design ● adopt synchronous gear and drive gear of national standard precision grade 5 ● Innovative bearing arrangement of screw, fixed radial bearing and thrust bearing adopted to increase the service life ● oil and gas separation between compression chamber and lubricating chamber realized by Labyrinth seal + carbon ring seal, ensuring the discharge of pure air.
Permanent magnet motor	Magnetic properties, no external energy is required to maintain its magnetic field ● High efficiency and energy saving, the average efficiency of 75%- 80% can be achieved in the speed range of 1500-6000r/min. ● High accuracy in voltage regulation can prolong the battery’s service life. ● No brushes, no collector rings, and no sparks generated during operation, so there is no wireless interference, which greatly improves the operation performance.
Oil lubrication system	More reliable forced circulation lubrication cooling system separately designed ● advanced oil circuit system composed of oil pump, oil cooling and oil filter ● low oil temperature enables longer service life of bearings and gears
Operation control system	Integrated station monitoring instrument, signal control module, inverter, touch screen, etc., no additional installation required ● the selection of driving components is optimized, and parameter settings can accurately achieve higher efficiency ● Complete automatic control and protection functions, and realize online control and remote control at the same time ● A variety of operating modes, enabling users to adjust the operation to be more power-saving mode according to the changes in working conditions

Supply Scope

Items	Description	Unit	Qty.	Remarks
1	Blower main body	set	1
2	Motor	set	1	VFD
3	Cooling fan	set	1
4	Heat Exchanger	set	1
5	Air filter	set	1
6	Oil filter	set	1
7	Pressure valve	set	1
8	Oil pump	set	1
9	Connection pipe	pcs	1
10	Contactor	set	1
11	Inverter	set	1	Taiwan QMA
12	Enclosure	set	1
13	Check valve	set	1
14	Stainless steel expansion joint	set	1
15	Relief valve	set	1

Advantages

Energy Efficiency: PMSM + VFD reduces energy consumption by 10% compared to fixed-speed systems.

Precision Control: Real-time adjustments optimize performance for varying demands (e.g., aeration in wastewater treatment).

Lower Maintenance: Fewer moving parts and reduced wear from soft starts and stable operation.

Environmental Benefits: Lower carbon footprint and potential eligibility for energy-saving incentives.

Applications

Wastewater Treatment: Variable aeration demands in biological processes.

Industrial Processes: Pneumatic conveying, fermentation, or manufacturing requiring stable airflow.

HVAC Systems: Efficient air handling in large facilities.

Tag:

Contact Person: Iris Xu

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