China OEM Negative Pressure Roots Vacuum Pump for Pulp Dehydration Drying vacuum pump brakes

Product Description

negative pressure roots vacuum pump for pulp dehydration drying

Product Description

Roots blower is a positive displacement blower with impeller end face and front and rear end cover of the blower. The principle is a rotary compressor that uses 2 blade-shaped rotors to move relative to each other in the cylinder to compress and deliver gas. This kind of blower is simple in structure and convenient to manufacture. It is widely used in CHINAMFG aeration, sewage treatment and aeration, cement conveying, and is more suitable for gas conveying and pressurizing systems in low pressure occasions, and can also be used as a vacuum pump.

Vietnam cement 1.5kw pump Tri-Lobe roots blower for Vacuum packaging

Product Parameters

Model Pressure Flow Rate Motor
RHSR50 9.8kpa-58.8kpa 0.67m3/min-2.48m3/min 0.55kw-4kw
63. 7kpa-98kpa 0. 45m3/m in-2. 02m3/min 2.2kw-7.5kw
RHSR65 9.8kpa-58.8kpa 0.95m3/min-3.64m3/min 0.55kw-5.5kw
63.7kpa-98kpa 0. 78m3/m in-2.96m3/min 3kw-11kw
RHSR80 9.8kpa-58.8kpa 2.36m3/min-6.13m3/min 1.5kw-11kw
63.7kpa-98kpa 1.82m3/min-5.24m3/min 5.5kw-15kw
RHSR100 9.8kpa-58.8kpa 3.28m3/min-9.62m3/min 1.5kw-15kw
63.7kpa-98kpa 2.65m3/min-8.67m3/min 7 .5kw-18.5kw
RHSR125 9.8kpa-58.8kpa 5.37m3/min-13.39m3/min 2.2kw-22kw
63. 7kpa-98kpa 4.64m3/min-12.25m3/min 11kw-30kw
RHSR150 9.8kpa-58.8kpa 10 .39m3/min-29. 61 m3/min 5.5kw-55kw
63.7kpa-98kpa 9.53m3/min-28.35m3/min 8.5kw-75kw
RHSR175 9.8kpa-58.8kpa 19.65m3/min-40.67m3/min 11kw-75kw
RHSR200 9.8kpa-58.8kpa 27.65m3/min-58.81 m3/min 15kw-90kw
63. 7kpa-98kpa 25 .34m3/m in-56. 92m3/min 551<w-1321<w
RHSR250 9.8kpa-58.8kpa 61.4m3/min-97.1 m3/min 18.5kw-132kw
63.7kpa-98kpa 58.1 m3/min-93.7m3/min 90kw-220kw
RHSR300 9.8kpa-58 8kpa 87 .1 m3/min-136. 7m3/min 22kw-185kw
63.7kpa-98kpa 83.8m3/min-134.4m3/min 132kw-280kw
RHSR350 9.8kpa-58 8kpa 111.9m3/min-198.1 m3/min 30kw-250kw
63. 7kpa-98kpa 102.2m3/min-179.65m3/min 185kw-400kw

Packaging & Shipping

Roots Blower Packing and Delivery

Wooden case and iron case packaged
Send by ship / plane / train

  Vietnam cement 1.5kw pump Tri-Lobe roots blower for Vacuum packaging


Roots Blower Application
2.Sewage treatment/ Effluent Treatment & Sludge Management
3.Conventional anaerobic & aerobic systems
4.Chemical industry
6.CHINAMFG Waste Management Bio gas plants
7.Engineered landfills
8.Printing and paper feeding
9.Electrical transportation
10.Pneumatic conveying
11.Pneumatic transport
12.Air Pollution Control, Noise Abatement & Ventilation Wet scrubbers
13.Vacuum packaging
14.Part demolding

China Sewage Treatment Industrial Air Roots Blower for Vacuum CHINAMFG Aeration

Roots Blower Features

1.The helical construction uses the stator helical method that the screen lines of casing at the suction and discharge sides are cut to a helical shape,and the triangle suction and discharge port formed by a straight line of the rotor top is to be opened and closed gradually.
2.The rotors are 3 lobes.
3.By adoption of an unique profile of rotor, the clearance between the rotors can be held to be constant, which makes the efficiency even higher.
4.The precision of rotors is fully controlled and variation of precision between blowers is almost nil because the rotors are produced under the mass production control by utilizing a prenision NC maching.
5.The advanced driving gears are adopted but only to extend  the use life but also to make noise lower.
6.The transported air is clean and is any oil-dust free oil lubrication is not needed in casing and the structure design prerent the bearing oil and gear oil from entering the casing.

How Does a Roots Blower Work?

Roots blowers are typically oil-free, air-cooled technologies comprised of 2 rotors that spin in opposite directions. Once the compression chamber comes into contact with the outlet port, compressed air flows back into the housing from the pressure side. Further compression takes place as the volume of the compression chamber further decreases with continued rotation. This means that the compression occurs against full counter-pressure, which results in low efficiency and a high noise level.

The low-efficiency of these blowers limits them to applications requiring very low pressure and single-stage compression. These are also frequently used as vacuum pumps and for pneumatic conveyance.

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3 lobe air blowers fish pond roots blower for mining/biogas/aquaculture/sewage treatment/landfill/cement

Company Profile

HangZhou City RuiHeng Building Materials Co., Ltd is specialized in the research, development, production and sales of geosynthetic materials, plastic products and plastic machinery. Our company is devoted to geosynthetic material research and development and application.

Our main products are hdpe geomembrane liner, plastic geogrid, geotextile, 3D geomat, geocell, geomembrane welding machine, extrusion welder and welding rod, etc. Our products have been widely used by clients in more than 20 countries and regions. Our products are applied in aquaculture, railways, highways, water conservancy, electric power, metallurgy, ports and municipal engineering construction. We have won the praises of customers.

Vietnam cement 1.5kw pump Tri-Lobe roots blower for Vacuum packaging


1.Do you have an extended warranty?
Yes, every product is 1 year quality warranty under customer correct using the products.12 months warranty and long-term marketing, after-sales support.

2.If you have a designated forwarder ?
Please contact us and provide destination port details. We have own forwarder. Working term is very fexible in our company.

3.Can you produce according to the samples?
Yes, we can produce by your samples or technical drawings.

4.Do you accept OEM order?
Yes,we can produce as client’s request. OEM and ODM order are accepted, any kind of logo printing or design are available.

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Material: Casting Iron
Usage: for Air Conditioner, for Manufacture, for Refrigerate, Aquaculture, Sewage Treatment, Industry
Pressure: High Pressure


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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

vacuum pump

What Is the Vacuum Level and How Is It Measured in Vacuum Pumps?

The vacuum level refers to the degree of pressure below atmospheric pressure in a vacuum system. It indicates the level of “emptiness” or the absence of gas molecules in the system. Here’s a detailed explanation of vacuum level measurement in vacuum pumps:

Vacuum level is typically measured using pressure units that represent the difference between the pressure in the vacuum system and atmospheric pressure. The most common unit of measurement for vacuum level is the Pascal (Pa), which is the SI unit. Other commonly used units include Torr, millibar (mbar), and inches of mercury (inHg).

Vacuum pumps are equipped with pressure sensors or gauges that measure the pressure within the vacuum system. These gauges are specifically designed to measure the low pressures encountered in vacuum applications. There are several types of pressure gauges used for measuring vacuum levels:

1. Pirani Gauge: Pirani gauges operate based on the thermal conductivity of gases. They consist of a heated element exposed to the vacuum environment. As gas molecules collide with the heated element, they transfer heat away, causing a change in temperature. By measuring the change in temperature, the pressure can be inferred, allowing the determination of the vacuum level.

2. Thermocouple Gauge: Thermocouple gauges utilize the thermal conductivity of gases similar to Pirani gauges. They consist of two dissimilar metal wires joined together, forming a thermocouple. As gas molecules collide with the thermocouple, they cause a temperature difference between the wires, generating a voltage. The voltage is proportional to the pressure and can be calibrated to provide a reading of the vacuum level.

3. Capacitance Manometer: Capacitance manometers measure pressure by detecting the change in capacitance between two electrodes caused by the deflection of a flexible diaphragm. As the pressure in the vacuum system changes, the diaphragm moves, altering the capacitance and providing a measurement of the vacuum level.

4. Ionization Gauge: Ionization gauges operate by ionizing gas molecules in the vacuum system and measuring the resulting electrical current. The ion current is proportional to the pressure, allowing the determination of the vacuum level. There are different types of ionization gauges, such as hot cathode, cold cathode, and Bayard-Alpert gauges.

5. Baratron Gauge: Baratron gauges utilize the principle of capacitance manometry but with a different design. They consist of a pressure-sensing diaphragm separated by a small gap from a reference electrode. The pressure difference between the vacuum system and the reference electrode causes the diaphragm to deflect, changing the capacitance and providing a measurement of the vacuum level.

It’s important to note that different types of vacuum pumps may have different pressure ranges and may require specific pressure gauges suitable for their operating conditions. Additionally, vacuum pumps are often equipped with multiple gauges to provide information about the pressure at different stages of the pumping process or in different parts of the system.

In summary, vacuum level refers to the pressure below atmospheric pressure in a vacuum system. It is measured using pressure gauges specifically designed for low-pressure environments. Common types of pressure gauges used in vacuum pumps include Pirani gauges, thermocouple gauges, capacitance manometers, ionization gauges, and Baratron gauges.

\vacuum pump

Can Vacuum Pumps Be Used in the Production of Solar Panels?

Yes, vacuum pumps are extensively used in the production of solar panels. Here’s a detailed explanation:

Solar panels, also known as photovoltaic (PV) panels, are devices that convert sunlight into electricity. The manufacturing process of solar panels involves several critical steps, many of which require the use of vacuum pumps. Vacuum technology plays a crucial role in ensuring the efficiency, reliability, and quality of solar panel production. Here are some key areas where vacuum pumps are utilized:

1. Silicon Ingot Production: The first step in solar panel manufacturing is the production of silicon ingots. These ingots are cylindrical blocks of pure crystalline silicon that serve as the raw material for solar cells. Vacuum pumps are used in the Czochralski process, which involves melting polycrystalline silicon in a quartz crucible and then slowly pulling a single crystal ingot from the molten silicon. Vacuum pumps create a controlled environment by removing impurities and preventing contamination during the crystal growth process.

2. Wafering: After the silicon ingots are produced, they undergo wafering, where the ingots are sliced into thin wafers. Vacuum pumps are used in wire saws to create a low-pressure environment that helps to cool and lubricate the cutting wire. The vacuum also assists in removing the silicon debris generated during the slicing process, ensuring clean and precise cuts.

3. Solar Cell Production: Vacuum pumps play a significant role in various stages of solar cell production. Solar cells are the individual units within a solar panel that convert sunlight into electricity. Vacuum pumps are used in the following processes:

– Diffusion: In the diffusion process, dopants such as phosphorus or boron are introduced into the silicon wafer to create the desired electrical properties. Vacuum pumps are utilized in the diffusion furnace to create a controlled atmosphere for the diffusion process and remove any impurities or gases that may affect the quality of the solar cell.

– Deposition: Thin films of materials such as anti-reflective coatings, passivation layers, and electrode materials are deposited onto the silicon wafer. Vacuum pumps are used in various deposition techniques like physical vapor deposition (PVD) or chemical vapor deposition (CVD) to create the necessary vacuum conditions for precise and uniform film deposition.

– Etching: Etching processes are employed to create the desired surface textures on the solar cell, which enhance light trapping and improve efficiency. Vacuum pumps are used in plasma etching or wet etching techniques to remove unwanted material or create specific surface structures on the solar cell.

4. Encapsulation: After the solar cells are produced, they are encapsulated to protect them from environmental factors such as moisture and mechanical stress. Vacuum pumps are used in the encapsulation process to create a vacuum environment, ensuring the removal of air and moisture from the encapsulation materials. This helps to achieve proper bonding and prevents the formation of bubbles or voids, which could degrade the performance and longevity of the solar panel.

5. Testing and Quality Control: Vacuum pumps are also utilized in testing and quality control processes during solar panel production. For example, vacuum systems can be used for leak testing to ensure the integrity of the encapsulation and to detect any potential defects or leaks in the panel assembly. Vacuum-based measurement techniques may also be employed for assessing the electrical characteristics and efficiency of the solar cells or panels.

In summary, vacuum pumps are integral to the production of solar panels. They are used in various stages of the manufacturing process, including silicon ingot production, wafering, solar cell production (diffusion, deposition, and etching), encapsulation, and testing. Vacuum technology enables precise control, contamination prevention, and efficient processing, contributing to the production of high-quality and reliable solar panels.vacuum pump

What Are the Primary Applications of Vacuum Pumps?

Vacuum pumps have a wide range of applications across various industries. Here’s a detailed explanation:

1. Industrial Processes:

Vacuum pumps play a vital role in numerous industrial processes, including:

– Vacuum Distillation: Vacuum pumps are used in distillation processes to lower the boiling points of substances, enabling separation and purification of various chemicals and compounds.

– Vacuum Drying: Vacuum pumps aid in drying processes by creating a low-pressure environment, which accelerates moisture removal from materials without excessive heat.

– Vacuum Packaging: Vacuum pumps are used in the food industry to remove air from packaging containers, prolonging the shelf life of perishable goods by reducing oxygen exposure.

– Vacuum Filtration: Filtration processes can benefit from vacuum pumps to enhance filtration rates by applying suction, facilitating faster separation of solids and liquids.

2. Laboratory and Research:

Vacuum pumps are extensively used in laboratories and research facilities for various applications:

– Vacuum Chambers: Vacuum pumps create controlled low-pressure environments within chambers for conducting experiments, testing materials, or simulating specific conditions.

– Mass Spectrometry: Mass spectrometers often utilize vacuum pumps to create the necessary vacuum conditions for ionization and analysis of samples.

– Freeze Drying: Vacuum pumps enable freeze-drying processes, where samples are frozen and then subjected to a vacuum, allowing the frozen water to sublimate directly from solid to vapor state.

– Electron Microscopy: Vacuum pumps are essential for electron microscopy techniques, providing the necessary vacuum environment for high-resolution imaging of samples.

3. Semiconductor and Electronics Industries:

High vacuum pumps are critical in the semiconductor and electronics industries for manufacturing and testing processes:

– Semiconductor Fabrication: Vacuum pumps are used in various stages of chip manufacturing, including deposition, etching, and ion implantation processes.

– Thin Film Deposition: Vacuum pumps create the required vacuum conditions for depositing thin films of materials onto substrates, as done in the production of solar panels, optical coatings, and electronic components.

– Leak Detection: Vacuum pumps are utilized in leak testing applications to detect and locate leaks in electronic components, systems, or pipelines.

4. Medical and Healthcare:

Vacuum pumps have several applications in the medical and healthcare sectors:

– Vacuum Assisted Wound Closure: Vacuum pumps are used in negative pressure wound therapy (NPWT), where they create a controlled vacuum environment to promote wound healing and removal of excess fluids.

– Laboratory Equipment: Vacuum pumps are essential in medical and scientific equipment such as vacuum ovens, freeze dryers, and centrifugal concentrators.

– Anesthesia and Medical Suction: Vacuum pumps are utilized in anesthesia machines and medical suction devices to create suction and remove fluids or gases from the patient’s body.

5. HVAC and Refrigeration:

Vacuum pumps are employed in the HVAC (Heating, Ventilation, and Air Conditioning) and refrigeration industries:

– Refrigeration and Air Conditioning Systems: Vacuum pumps are used during system installation, maintenance, and repair to evacuate moisture and air from refrigeration and air conditioning systems, ensuring efficient operation.

– Vacuum Insulation Panels: Vacuum pumps are utilized in the manufacturing of vacuum insulation panels, which offer superior insulation properties for buildings and appliances.

6. Power Generation:

Vacuum pumps play a role in power generation applications:

– Steam Condenser Systems: Vacuum pumps are used in power plants to remove non-condensable gases from steam condenser systems, improving thermal efficiency.

– Gas Capture: Vacuum pumps are utilized to capture and remove gases, such as hydrogen or helium, in nuclear power plants, research reactors, or particle accelerators.

These are just a few examples of the primary applications of vacuum pumps. The versatility and wide range of vacuum pump types make them essential in numerous industries, contributing to various manufacturing processes, research endeavors, and technological advancements.

China OEM Negative Pressure Roots Vacuum Pump for Pulp Dehydration Drying   vacuum pump brakesChina OEM Negative Pressure Roots Vacuum Pump for Pulp Dehydration Drying   vacuum pump brakes
editor by CX 2024-03-21

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