Product Description
Product Description
Short Description:
Vacuum pump does not have the function of adjusting vacuum degree, if you need this function you should be match the vacuum control instrument.
Advantage:
1.Original whole sealing compressor, advanced performance and reliable quality.
2.Refrigerating unit of relay, protector and capacitance are all imported original high-quality equipment, that ensure reliability and using life.
3.Digital temperature control, simple and marked operation.
4.Low-temperature cooling liquid circulating pump has multiple functions of providing low-temperature high-quality refrigerating water, low-temperature non-freezing liquid and small low-temperature water bath. Combined with rotary evaporator, vacuum freezing drying oven, circulating water multi-purpose vacuum pump, magnetic stirrer and other instruments, it can proceed chemical reactions and medicine storage under the conditions of multiple-function and low-temperature. In addition, it can be assembled with kinds of large precise equipment to overcome these problems that instrument can’t be used due to low-quality refrigerating water, over temperature and unstable water pressure.
5.Its professional design is accorded with Chinese situation 220V, 50Hz, avoiding faults and using difficulties caused by the design 110V, 60Hz.
6.Circulating system adopts stainless steel materials, with functions of anti-corrosion, rustproof and anti-pollution from low-temperature liquid.
7.As for these large expensive lab instruments of high pure metal, purification of raw materials, environmental labs and magnetic control test shot, and vacuum coating equipment, Low-temperature cooling liquid circulating pump can provide refrigerating water that meets demands of temperature and quality, has characteristics of energy and water conservation, anti-pollution and anti-scaling, which can protect large precise instrument and equipment efficiently.
8.It collected functions of circulating cooling water, small volume and reasonable power, which fully shows the characteristics of saving space.
9.Low-temperature cooling liquid circulating pump meets all kinds of using condition.
Product Parameters
| Model | SHZ-DIII | Double gauge double pumping | SHZ-DIII | Four gauge 4 pumping |
| Consumption | 180W | 370W | ||
| Power Supply | 220V | 220V | ||
| Circulating Pump Flow | 20L/MIN | 40L/MIN | ||
| PumpLift | 8M | 12M | ||
| Material | Anti-corrosion | Anti-corrosion | ||
| Pump Head | 2 | 4 | ||
| Speed of Evacuation | 10L/MIN | 10L/MIN | ||
| Vacuum | 0.098MPA | 0.098MPA | ||
| Capacity | 15L | 15L | ||
| Size | 400*280*420 | 400*280*420 | ||
| Weight | 15KG | 17KG | ||
Core Products
Company Profile
Certifications
Packaging & Shipping
FAQ
Q: Are you trading company or manufacturer?
A: We are professional manufacture of lab equipment and we have our own factory. We commit to be your professional. We commit to be your professional, efficient and reliable partner.
Q: How long is your delivery time?
A: Generally it is within 7 working days after receiving 100% payment if the goods are in stock. Or it is 15 working days if the goods are not in stock, depending on order quantity.
Q: Do you provide samples? Is it free?
A: Yes, we could offer the sample. Considering the high value of our products, the sample is not free, but we will give you our best price including shipping cost.
Q:How about CZPT payment term?
A:T/T & L/C
Q:How about CZPT validity of quotation ?
A:Usually 15 days as the shipping freight and exchange rate can be fluctuant.
Q:How about the package?
A:Bubble film + Cotton +Standard export wooden case.
Q:How to inspect the goods?
A:Products will be checked by our QC staff frist, then our proejct manager. Client can come and check bythemselves or
third party check is available.
| After-sales Service: | on online technical support |
|---|---|
| Warranty: | 1 year |
| Oil or Not: | Oil Free |
| Structure: | Circulating Water |
| Exhauster Method: | Entrapment Vacuum Pump |
| Vacuum Degree: | Vacuum |
| Customization: |
Available
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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.
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. 
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. 
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.
editor by CX 2023-05-22