Applicable Industries: Farms, vacuum pump for cow milk pump, 500W milk vacuum pump -98Kpa high vacuum air pump, vacuum pump for printing machine, vacuum pump for filling machine
Showroom Location: None
Video outgoing-inspection: Provided
Machinery Test Report: Provided
Marketing Type: New Product 2571
Warranty of core components: 2 years
Core Components: Engine, Motor, Pump
Condition: New
Type: piston type vacuum pump
Use: Cow/Sheep/Goat Milking
Voltage: 220V 110V
Dimension(L*W*H): 271*128*214 mm
Weight: 10.8 KG
Warranty: 2 years
Key Selling Points: Low Noise Level
Keywords: Vacuum Pump
Standard or Nonstandard: Standard
Model: HC750A2 piston vacun pump
Max vacuum: 28 inch Hg
Color: silver (can customized )
Power Supply: 120 VAC, 60 Hz; 5 feet cord with UAS plug
Capacitor: 80 uF, cased in and protected
muffler: Come with a mini muffler for quieter operation
Flow: 120L./min
Application: Milking Machine Tool
Packaging Details: 1 pcs vacuum pump / carton case , the carton case size is : 32.5×21.5×25.5 cm , the weight is 10.8kg ;90pcs vacuum pump / pallet , the pallet size is :120 x 110 x 178 cm ,2.3496 CBM ,1032 kg
Port: HangZhou or ZheJiang port

Product Paramenters

ITEM NOHC750A2-1
NameAC Oil free vacuum pump
Packing1 pcs / carton case
Weight10.6 kg
Dimension271*128*216 mm
Air vacuum flow rate 120 L/min @ -92Kpa or 60L/min @ -98Kpa
Power 500W
Noise ≤51dB(A)
Temperature -5℃-40℃
Thermal protection135℃
Attached accessories With Power cord , capacitor , handles , muffler , and rubber feet attached
Product Image Product video Product Advantages Recommend Products Company Profile FAQ Q.1: What’s your factory address ? May I visit your factory ? Our factory is located in HangZhou city, ZHangZhoug province, near to HangZhou, ZheJiang and HangZhou, about 2 hours by bus or train.Welcome to visit our factory.Q.2: When I get my products, is there anything I should pay attention to ?It need to clear the filter once every 2 months.When use it, it need to handle with care and pay more attention to waterproof.Q.3 : Can I buy the sample to test?We are pleased to send the samples for your evaluation.And the samples shipping freight can be return back to you with next bulk order .Q.4: Do you have test records of every pump?We will inspect products 3 times before shipment and every pump have the test records. We will keep these test records to our quality traceability system about 3-5 years.Test items : workmanship, air flow rate, power, vacuum pressure, current, noise, vibration , temperature and durability etc.Q.5:How long is the life of the your pump?“Quality is our culture”, our vacuum pump with long life (20000 hours ) and high quality ( stable air flow, import spare parts, high workmanship etc ).Q.6: What’s your warranty?Our warranty is 2 years.It means that if our machine has any problems within 2 years, we will send you new 1 or free spare parts for your replacement.Q.7: Question : How many years of your factory? Our factory has the production experience more than 20 years. We make main spare parts of vacum pump by ourselves (include the motor), so we can control the pumps quality very wellQ.8: Question: Can you produce products same/ similar with mine?We have professional and experienced R & D team, so we can better serve customers to achieve high-end customization and development. We accept the ODM and OEM.

Types of vacuum pumps

A vacuum pump is a device that draws gas molecules from a sealed volume and leaves a partial vacuum in its wake. Its job is to create a relative vacuum within a specific volume or volume. There are many types of vacuum pumps, including centrifugal, screw and diaphragm.
Vacuum Pump

Forward centrifugal pump

Positive displacement centrifugal vacuum pumps are one of the most commonly used pump types in the oil and gas industry. Their efficiency is limited to a range of materials and can handle relatively high solids concentrations. However, using these pumps has some advantages over other types of pumps.
Positive displacement pumps have an enlarged cavity on the suction side and a reduced cavity on the discharge side. This makes them ideal for applications involving high viscosity fluids and high pressures. Their design makes it possible to precisely measure and control the amount of liquid pumped. Positive displacement pumps are also ideal for applications requiring precise metering.
Positive displacement pumps are superior to centrifugal pumps in several ways. They can handle higher viscosity materials than centrifuges. These pumps also operate at lower speeds than centrifugal pumps, which makes them more suitable for certain applications. Positive displacement pumps are also less prone to wear.
Positive displacement vacuum pumps operate by drawing fluid into a chamber and expanding it to a larger volume, then venting it to the atmosphere. This process happens several times per second. When maximum expansion is reached, the intake valve closes, the exhaust valve opens, and fluid is ejected. Positive displacement vacuum pumps are highly efficient and commonly used in many industries.

Self-priming centrifugal pump

Self-priming centrifugal pumps are designed with a water reservoir to help remove air from the pump. This water is then recirculated throughout the pump, allowing the pump to run without air. The water reservoir can be located above or in front of the impeller. The pump can then reserve water for the initial start.
The casing of the pump contains an increasingly larger channel forming a cavity retainer and semi-double volute. When water enters the pump through channel A, it flows back to the impeller through channels B-C. When the pump is started a second time, the water in the pump body will be recirculated back through the impeller. This recycling process happens automatically.
These pumps are available in a variety of models and materials. They feature special stainless steel castings that are corrosion and wear-resistant. They can be used in high-pressure applications and their design eliminates the need for inlet check valves and intermediate valves. They can also be equipped with long intake pipes, which do not require activation.
Self-priming centrifugal pumps are designed to run on their own, but there are some limitations. They cannot operate without a liquid source. A foot valve or external liquid source can help you start the self-priming pump.

Screw Pump

The mechanical and thermal characteristics of a screw vacuum pump are critical to its operation. They feature a small gap between the rotor and stator to minimize backflow and thermal growth. Temperature is a key factor in their performance, so they have an internal cooling system that uses water that circulates through the pump’s stator channels. The pump is equipped with a thermostatically controlled valve to regulate the water flow. Also includes a thermostatic switch for thermal control.
Screw vacuum pumps work by trapping gas in the space between the rotor and the housing. The gas is then moved to the exhaust port, where it is expelled at atmospheric pressure. The tapered discharge end of the screw further reduces the volume of gas trapped in the chamber. These two factors allow the pump to work efficiently and safely.
Screw vacuum pumps are designed for a variety of applications. In some applications, the pump needs to operate at very low pressures, such as when pumping large volumes of air. For this application, the SCREWLINE SP pump is ideal. Their low discharge temperature and direct pumping path ensure industrial process uptime. These pumps also feature non-contact shaft seals to reduce mechanical wear. Additionally, they feature a special cantilever bearing arrangement to eliminate potential sources of bearing failure and lubrication contamination.
Screw vacuum pumps use an air-cooled screw to generate a vacuum. They are compact, and clean, and have a remote monitoring system with built-in intelligence. By using the app, users can monitor pump performance remotely.
Vacuum Pump

Diaphragm Pump

Diaphragm vacuum pumps are one of the most common types of vacuum pumps found in laboratories and manufacturing facilities. The diaphragm is an elastomeric membrane held in place around the outer diameter. While it is not possible to seal a diaphragm vacuum pump, there are ways to alleviate the problems associated with this design.
Diaphragm vacuum pumps are versatile and can be used in a variety of clean vacuum applications. These pumps are commercially available with a built-in valve system, but they can also be modified to include one. Because diaphragm pumps are so versatile, it’s important to choose the right type for the job. Understanding how pumps work will help you match the right pump to the right application.
Diaphragm vacuum pumps offer a wide range of advantages, including an extremely long service life. Most diaphragm pumps can last up to ten thousand hours. However, they may be inefficient for processes that require deep vacuum, in which case alternative technologies may be required. Additionally, due to the physics of diaphragm pumps, the size of these pumps may be limited. Also, they are not suitable for high-speed pumping.
Diaphragm vacuum pumps are a versatile subset of laboratory pumps. They are popular for their oil-free construction and low maintenance operation. They are available in a variety of styles and have many optional features. In addition to low maintenance operation, they are chemically resistant and can be used with a variety of sample types. However, diaphragm pumps tend to have lower displacements than other vacuum pumps.

Atmospheric pressure is a key factor in a vacuum pump system

Atmospheric pressure is the pressure created by the collision of air molecules. The more they collide, the greater the pressure. This applies to pure gases and mixtures. When you measure atmospheric pressure, the pressure gauge reads about 14.7 psia. The higher the pressure, the greater the force on the gas molecules.
The gas entering the vacuum pump system is below atmospheric pressure and may contain entrained liquids. The mechanism of this process can be explained by molecular kinetic energy theory. The theory assumes that gas molecules in the atmosphere have high velocities. The resulting gas molecules will then start moving in random directions, colliding with each other and creating pressure on the walls of the vacuum vessel.
Atmospheric pressure is a critical factor in a vacuum pump system. A vacuum pump system is useless without proper atmospheric pressure measurement. The pressure in the atmosphere is the total pressure of all gases, including nitrogen and oxygen. Using total pressure instead of partial pressure can cause problems. The thermal conductivity of various gases varies widely, so working at full pressure can be dangerous.
When choosing a vacuum pump, consider its operating range. Some pumps operate at low atmospheric pressure, while others are designed to operate at high or ultra-high pressure. Different types of pumps employ different technologies that enhance their unique advantages.
Vacuum Pump

The screw pump is less efficient in pumping gases with smaller molecular weight

Vacuuming requires a high-quality pump. This type of pump must be able to pump gas of high purity and very low pressure. Screw pumps can be used in laboratory applications and are more efficient when pumping small molecular weight gases. Chemical resistance is critical to pump life. Chemical resistant materials are also available. Chemically resistant wetted materials minimize wear.
Gear pumps are more efficient than screw pumps, but are less efficient when pumping lower molecular weight gases. Gear pumps also require a larger motor to achieve the same pumping capacity. Compared to gear pumps, progressive cavity pumps also have lower noise levels and longer service life. In addition, gear pumps have a large footprint and are not suitable for tight spaces.
Progressive cavity pumps have two or three screws and a housing and side cover. They are also equipped with gears and bearings. Their mechanical design allows them to operate in high pressure environments with extremely low noise. The progressive cavity pump is a versatile pump that can be used in a variety of applications.
Dry screw compressors have different aspect ratios and can operate at high and low pressures. The maximum allowable differential pressure for screw compressors ranges from 0.4 MPa for 3/5 rotors to 1.5 MPa for 4/6 rotors. These numbers need to be determined on a case-by-case basis.

China Best Sales 500W milk vacuum pump -98Kpa high vacuum mini air pump low noise for Milking Machine Tool     vacuum pump belt	China Best Sales 500W milk vacuum pump -98Kpa high vacuum mini air pump low noise for Milking Machine Tool     vacuum pump belt