China supplier Single-Stage Diesel Vacuum Fire Fight High Pressure Pump vacuum pump brakes

Product Description

Product Datails

PURITY Product Range

Our Company

    CHINAMFG Co., Ltd. is a specialized manufacturer and supplier of  the high-quality
industrial pumps, exporting to global market in competitive prices. Our main products
are centrifugal pumps, fire pumps, inline pumps and multistage jockey pumps.

    Purity Pump was found in 1998, headquartered in Daxi, HangZhou (ZHangZhoug,  China),
equipped with professional lathe, punching machine, water testing apparatus,  spray-
painting plant, etc. Purity has over 200 employees, around 10% of whom are engaged
in research and development.

    Purity consists of R&D institute, main factory, machinery workshop, rotor workshop
showroom in HangZhou city, and 1 branch in ZheJiang .Our products and service have
been deployed in more than 60 countries. And we supply water pumps for many  large
projects  like National Olympic Stadium. We also supply centrifugal and fire pumps  to
some CHINAMFG pump companies all over the world.
    Aimed to “Life From Purity”, with the tenet of  ‘innovation,  high  quality,  customer
satisfaction”, we are striving for the top-ranking brand of industrial pumps.


1. Q: What is your payment terms?
    A: 30%T/T, L/C,West Union, Ali-Pay.etc.
2. Q: What is your MOQ for sample?
    A: 1pc or any of your required quantity, the more quantity you order, the best price you’ll get.
3. Q: Are you Trader or Manufacturer?
    A: 100% Manufacturer,welcome to visit our factory and establish business partnership with us.
4. Q: Do u have your own designers and engineers?
    A: Yes, we have.
5. Q: How long is your warranty?
    A: 2 years after purchasing our pump.

Why Choose Us?

1. Exported to more than 60 countries.
2. More than 90% customers make payment before meeting us.
3. Re-order rate up tp 80%
4. Focus on middle~high-end market, we never CHINAMFG market by using inferior material.
5. With professional engineers research.


PURITY Pump Products

Industrial pump Centrifugal Pump Fire pump Fire pump system
Industry pump Centrifugal Pumps fire fighting pumps fire pump set
electric motor pump Centrifugal water pump fire pumps Fire fighting Pump set
horizontal pump Standard Centrifugal Pump fire fighting pump Fire fighting Pump system
bare shaft pump Monoblock Centrifugal Pump fire fighting water pump fire fighting system
close-coupled pump Centrifugal Monoblock Pump fire hydrant pump fire fighting equipment
suction pumps Centrifugal surface pump fire sprinkler pump fire pump and jockey
surface pump horizontal centrifugal pumps fire fighting engine pump fire electric pump
monoblock pump pumps centrifugal diesel engine fire pump jockey and electric pump
end suction pump End suction water pump fire engine water pump fire pump set with electric
SS end suction pump End suction Centrifugal Pump electric fire pump fire pump set fighting
suction water pump close coupled centrifugal pump fire fighting pumps electric Fire fighting Pump group
horizontal inline pump Industrial centrifugal pump fire water pump fire system water pump
vertical inline pump centrifugal horizontal pump centrifugal fire pump fire pump group
inline circulation pump SS centrifugal pump fire pump engine diesel fire fighting pumps
vertical multistage pump stainless centrifugal pump end suction fire pump diesel fire pump set
Split case pump    self-priming centrifugal pump fire fighting electric pump diesel set pump fire
double suction pump horizontal centrifugal pump diesel fire pump jockey fire pump
Split case pump horizontal inline centrifugal pump fire pump diesel fire jockey pump
Sewage pump water centrifugal pump diesel driven fire pump Split case fire pump
sewage water pump Vertical centrifugal pump jockey pump Double Suction fire pump
submersible sewage pump Split case centrifugal pump   multistage jockey pump fire horizontal pump

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Max.Head: >150m
Max.Capacity: >400 L/min
Driving Type: Motor
Structure: Single-stage Pump
Power: Electric
Start Up: Electric Pump


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 for Leak Detection?

Yes, vacuum pumps can be used for leak detection purposes. Here’s a detailed explanation:

Leak detection is a critical task in various industries, including manufacturing, automotive, aerospace, and HVAC. It involves identifying and locating leaks in a system or component that may result in the loss of fluids, gases, or pressure. Vacuum pumps can play a significant role in leak detection processes by creating a low-pressure environment and facilitating the detection of leaks through various methods.

Here are some ways in which vacuum pumps can be used for leak detection:

1. Vacuum Decay Method: The vacuum decay method is a common technique used for leak detection. It involves creating a vacuum in a sealed system or component using a vacuum pump and monitoring the pressure change over time. If there is a leak present, the pressure will gradually increase due to the ingress of air or gas. By measuring the rate of pressure rise, the location and size of the leak can be estimated. Vacuum pumps are used to evacuate the system and establish the initial vacuum required for the test.

2. Bubble Testing: Bubble testing is a simple and visual method for detecting leaks. In this method, the component or system being tested is pressurized with a gas, and then immersed in a liquid, typically soapy water. If there is a leak, the gas escaping from the component will form bubbles in the liquid, indicating the presence and location of the leak. Vacuum pumps can be used to create a pressure differential that forces gas out of the leak, making it easier to detect the bubbles.

3. Helium Leak Detection: Helium leak detection is a highly sensitive method used to locate extremely small leaks. Helium, being a small atom, can easily penetrate small openings and leaks. In this method, the system or component is pressurized with helium gas, and a vacuum pump is used to evacuate the surrounding area. A helium leak detector is then used to sniff or scan the area for the presence of helium, indicating the location of the leak. Vacuum pumps are essential for creating the low-pressure environment required for this method and ensuring accurate detection.

4. Pressure Change Testing: Vacuum pumps can also be used in pressure change testing for leak detection. This method involves pressurizing a system or component and then isolating it from the pressure source. The pressure is monitored over time, and any significant pressure drop indicates the presence of a leak. Vacuum pumps can be used to evacuate the system after pressurization, returning it to atmospheric pressure for comparison or retesting.

5. Mass Spectrometer Leak Detection: Mass spectrometer leak detection is a highly sensitive and precise method used to identify and quantify leaks. It involves introducing a tracer gas, usually helium, into the system or component being tested. A vacuum pump is used to evacuate the surrounding area, and a mass spectrometer is employed to analyze the gas samples for the presence of the tracer gas. This method allows for accurate detection and quantification of leaks down to very low levels. Vacuum pumps are crucial for creating the necessary vacuum conditions and ensuring reliable results.

In summary, vacuum pumps can be effectively used for leak detection purposes. They facilitate various leak detection methods such as vacuum decay, bubble testing, helium leak detection, pressure change testing, and mass spectrometer leak detection. Vacuum pumps create the required low-pressure environment, assist in evacuating the system or component being tested, and enable accurate and reliable leak detection. The choice of vacuum pump depends on the specific requirements of the leak detection method and the sensitivity needed for the application.

vacuum pump

Can Vacuum Pumps Be Used in Food Processing?

Yes, vacuum pumps are widely used in food processing for various applications. Here’s a detailed explanation:

Vacuum pumps play a crucial role in the food processing industry by enabling the creation and maintenance of vacuum or low-pressure environments. They offer several benefits in terms of food preservation, packaging, and processing. Here are some common applications of vacuum pumps in food processing:

1. Vacuum Packaging: Vacuum pumps are extensively used in vacuum packaging processes. Vacuum packaging involves removing air from the packaging container to create a vacuum-sealed environment. This process helps extend the shelf life of food products by inhibiting the growth of spoilage-causing microorganisms and reducing oxidation. Vacuum pumps are used to evacuate the air from the packaging, ensuring a tight seal and maintaining the quality and freshness of the food.

2. Freeze Drying: Vacuum pumps are essential in freeze drying or lyophilization processes used in food processing. Freeze drying involves removing moisture from food products while they are frozen, preserving their texture, flavor, and nutritional content. Vacuum pumps create a low-pressure environment that allows frozen water to directly sublimate from solid to vapor, resulting in the removal of moisture from the food without causing damage or loss of quality.

3. Vacuum Cooling: Vacuum pumps are utilized in vacuum cooling processes for rapid and efficient cooling of food products. Vacuum cooling involves placing the food in a vacuum chamber and reducing the pressure. This lowers the boiling point of water, facilitating the rapid evaporation of moisture and heat from the food, thereby cooling it quickly. Vacuum cooling helps maintain the freshness, texture, and quality of delicate food items such as fruits, vegetables, and bakery products.

4. Vacuum Concentration: Vacuum pumps are employed in vacuum concentration processes in the food industry. Vacuum concentration involves removing excess moisture from liquid food products to increase their solids content. By creating a vacuum, the boiling point of the liquid is reduced, allowing for gentle evaporation of water while preserving the desired flavors, nutrients, and viscosity of the product. Vacuum concentration is commonly used in the production of juices, sauces, and concentrates.

5. Vacuum Mixing and Deaeration: Vacuum pumps are used in mixing and deaeration processes in food processing. In the production of certain food products such as chocolates, confectioneries, and sauces, vacuum mixing is employed to remove air bubbles, achieve homogeneity, and improve product texture. Vacuum pumps aid in the removal of entrapped air and gases, resulting in smooth and uniform food products.

6. Vacuum Filtration: Vacuum pumps are utilized in food processing for vacuum filtration applications. Vacuum filtration involves separating solids from liquids or gases using a filter medium. Vacuum pumps create suction that draws the liquid or gas through the filter, leaving behind the solid particles. Vacuum filtration is commonly used in processes such as clarifying liquids, removing impurities, and separating solids from liquids in the production of beverages, oils, and dairy products.

7. Marinating and Brining: Vacuum pumps are employed in marinating and brining processes in the food industry. By applying a vacuum to the marinating or brining container, the pressure is reduced, allowing the marinade or brine to penetrate the food more efficiently. Vacuum marinating and brining help enhance flavor absorption, reduce marinating time, and improve the overall taste and texture of the food.

8. Controlled Atmosphere Packaging: Vacuum pumps are used in controlled atmosphere packaging (CAP) systems in the food industry. CAP involves modifying the gas composition within food packaging to extend the shelf life and maintain the quality of perishable products. Vacuum pumps aid in the removal of oxygen or other unwanted gases from the package, allowing the introduction of a desired gas mixture that preserves the food’s freshness and inhibits microbial growth.

These are just a few examples of how vacuum pumps are used in food processing. The ability to create and control vacuum or low-pressure environments is a valuable asset in preserving food quality, enhancing shelf life, and facilitating various processing techniques in the food industry.

China supplier Single-Stage Diesel Vacuum Fire Fight High Pressure Pump   vacuum pump brakesChina supplier Single-Stage Diesel Vacuum Fire Fight High Pressure Pump   vacuum pump brakes
editor by CX 2024-03-01


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