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NSRH-250 Roots Blower

Greentech International (Zhangqiu) Co., Ltd is the professional roots blower supplier. The NSRH type clover spiral Roots blower on the basis of the manufacture and sale of a Roots blower for many years the development of new products using new technology.
The machine through the use of new lines on the impeller, the overall adiabatic efficiency and volumetric efficiency is further improved, and is excellent particularly in the fan of the air volume and pressure characteristics.
So-called excellent efficiency is the amount of heat generation of the wind turbine itself is reduced, i. e. The temperature rise dropped, the various models using the exhaust pressure in the dry state is up to 1kgf/cm2.

tell ：+86-531-83117088

WECAT：+86 13869171699 EMAIL：greentech@vip.163.com

Product Brief Introduction

Product Parameter

Product Application

Features of Series NSRH Tri-Lobe Roots Blower:

1. Each model has a performance table and standard specification, easy to select fan model;
2 Including attachments, fan body to standardize. Mass production system, to be able to meet your requirements at any time;
3. Because there are good helix structure, and using the same fan matching a muffler with a silent air cleaner, the operating noise of the fan is much lower than in the past;
4. Rotor is fully machining precision products. Has been made in the manufacture of the complete dynamic balance, almost no vibration.
5. To take a small design, small mounting area.

NSRH-250 Performance table
NSRH-250 Performance table
Speed	Pressure rise（kgf/cm2）
	0.20		0.25		0.30		0.35		0.40		0.45		0.50		0.55		0.60		0.65		0.70		0.75		0.80
	19.6kpa		24.5kpa		29.4kpa		34.3kpa		39.2kpa		44.1kpa		49kpa		53.9kpa		58.8kpa		63.7kpa		68.6kpa		73.5kpa		78.4kpa
	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La	Qs	La
990	63.10	28.80	62.90	35.80	62.70	41.80	62.50	48.60	62.20	55.30	62.00	62.10	61.80	66.70	61.60	73.30	61.40	76.70	61.20	83.10	61.00	88.90	59.90	93.60	59.80	99.70
1170	74.30	33.90	74.00	42.20	73.60	49.10	73.10	56.90	72.70	64.60	72.30	72.50	72.00	77.80	71.70	85.30	71.30	89.20	71.00	96.10	69.60	101.50	69.40	108.50	69.00	115.10
1250	79.60	36.30	79.20	45.20	78.80	52.60	78.50	61.10	78.20	69.50	77.90	78.10	77.40	83.60	77.10	91.70	76.80	96.00	76.40	103.50	76.00	110.80	75.60	118.20	75.10	125.20
1360	88.70	40.50	88.50	50.40	88.30	58.90	88.10	68.50	87.80	78.10	87.50	87.60	87.20	94.20	86.90	103.40	86.60	108.30	86.30	112.50	86.00	125.50	85.70	133.90	85.40	142.40
1480	96.50	44.10	96.20	54.80	96.10	64.10	95.80	74.50	95.50	84.90	95.20	95.80	95.00	102.60	94.50	112.50	94.10	117.30	93.70	126.90	93.40	136.20	93.20	145.60	92.60	154.30

1. Water Treatment and Environmental Protection Field (Most Core and Classic Applications)
Wastewater Treatment:

Aeration and Oxygen Supply: This is the largest application market for Roots blowers. They provide oxygen to biological tanks in processes such as activated sludge, SBR, and oxidation ditches, promoting the growth of aerobic microorganisms and breaking down pollutants.

Dissolved Air Flotation: Produces tiny bubbles used in flotation tanks, causing suspended solids, grease, and other substances to attach to bubbles and rise to the water surface for easy removal.

Backwashing: Used for regular backwashing of filters (such as sand filters and activated carbon filters) to remove blockages within the filter media.

Sludge Digestion: Delivers gases or stirs the sludge in anaerobic digesters.

Aquaculture:

Oxygenation: Provides bottom aeration for high-density aquaculture ponds (such as fish, shrimp, and sea cucumber farming), increasing dissolved oxygen levels and improving stocking density and survival rates.

2. Industrial Processes and Pneumatic Conveying

Pneumatic Conveying Systems:

Positive Pressure Conveying: Used to transport powdered or granular materials such as flour, cement, plastic pellets, grains, and feed. Materials are blown through pipelines to their destination.

Vacuum Feeding: Serves as a vacuum source for automatically sucking materials on production lines.

Combustion and Combustion Support:

Provides combustion air for small industrial boilers, incinerators, and gas equipment, ensuring complete combustion and improving efficiency.

Drying and Cooling:

Fluidized Bed Drying: Fluidizes granular materials so they fully contact hot air for drying.

Cooling: Provides air cooling for newly produced high-temperature products (such as plastic pellets and metal castings).

Printing and Packaging:

Supplies a uniform and stable air source for printing machines (e.g., offset presses) used for paper feeding, drying, embossing, etc.

In packaging machinery, it is used for pneumatic actions such as labeling, filling, and bag forming.

3. Other Industry Applications

Food and Pharmaceuticals:

Used for ventilation and oxygen supply in fermentation processes (e.g., MSG, yeast, and antibiotic production).

Airflow mixing or material conveying in cleanrooms (requires food-grade lubricants and special treatment).

Power and Metallurgy:

Provides insulating and cooling air for electrostatic precipitators and dust collectors.

Blowing for blast furnaces and cupolas (small to medium-sized furnaces).

Chemical and Petroleum:

Used for reactor agitation, gas circulation, and pressurized transport of process gases.

Vacuum Applications:

Used as a vacuum pump (suction end connected to the system, exhaust end released to the atmosphere) for vacuum adsorption, dehydration, filtration, etc., such as brick and tile factory vacuum extruders and hospital central vacuum systems.