Screw Vacuum Pump



HZPT professional manufacturing

HZPT is a leading global enterprise specializing in the design, manufacture, and sale of Screw Vacuum Pumps. Renowned for our commitment to engineering excellence and quality assurance, HZPT has established itself as a premier provider in the vacuum technology sector, particularly noted for our state-of-the-art Screw Vacuum Pumps. Our products are celebrated for their reliability, efficiency, and superior performance, catering to a wide range of applications across industries such as chemical processing, pharmaceuticals, food packaging, and electronics manufacturing.

At HZPT, we leverage advanced engineering techniques and innovative design principles to produce Screw Vacuum Pumps that meet the highest standards of durability and operational efficiency. Our pumps are designed to deliver optimal performance under various conditions, offering both oil-sealed and dry-running configurations to suit diverse operational requirements and applications.

Advantages of Screw Vacuum Pump compared to other vacuum pumps

Feature Rotary Vane Liquid Ring Vacuum Pump Diaphragm Vacuum Pump
Operating Principle Utilizes two screw rotors rotating in opposite directions to compress and move gas through the pump. Uses rotating vanes in a cavity to create vacuum by volume reduction. Operates by using a rotating impeller within a ring of liquid to create a vacuum. Relies on the reciprocating movement of a diaphragm to pump gas.
Lubrication Can operate with or without oil lubrication, offering oil-free models for clean applications. Typically requires oil lubrication, which can lead to potential contamination. Uses water or other liquids as the sealing mechanism, which may introduce process contamination. Oil-free, suitable for clean and dry applications.
Maintenance Lower maintenance due to fewer moving parts and no oil changes in oil-free models. Requires regular maintenance for oil changes and vane replacement. Needs consistent maintenance to manage the sealing liquid and ensure proper operation. Generally low maintenance but diaphragm and valve replacements are necessary over time.
Efficiency High efficiency due to continuous operation without the need for internal pressure recovery. Efficiency can be affected by wear and the need for internal pressure recovery. Limited efficiency due to the inherent slip of the sealing liquid. Less efficient for high-volume applications due to limited flow capacity.
Noise Level Typically quieter than rotary vane and liquid ring pumps due to smoother operation. Noise levels can be higher due to the design and need for lubrication. Can be noisy due to the handling of the sealing liquid. Operates quietly, suitable for laboratory and medical applications.
Water Handling Oil-free models can handle moist or slightly contaminated gases without issue. Moisture and contaminants can cause oil emulsification and vane wear. Capable of handling wet gases but at the cost of potential liquid carryover. Not suitable for wet or heavily contaminated gases.
Environmental Impact Oil-free models offer an environmentally friendly solution with no risk of oil contamination. Oil mist and potential contamination issues need to be managed. Water and liquid disposal must be considered, impacting environmental sustainability. Oil-free operation minimizes environmental impact.
Application Versatility Suitable for a wide range of applications, including those requiring clean and dry vacuum environments. Broad application range but with considerations for oil contamination. Best suited for applications where water handling and tolerance to contamination are required. Ideal for applications demanding very clean and dry vacuum conditions.


Features of Screw Vacuum Pump

The screw vacuum pump is a type of vacuum pumping equipment that utilizes a pair of screws rotating synchronously at high speed within the pump casing to create suction and exhaust. Here are some of its key features:

1. High Efficiency: The screw vacuum pump adopts both equal pitch and variable pitch screws, resulting in high inspiratory exhaust efficiency. This means it can quickly and effectively create and maintain a vacuum, making it suitable for a wide range of applications.

2. Low Exhaust Temperature and Power Consumption: Compared to other types of vacuum pumps, the screw vacuum pump has a relatively low exhaust temperature and power consumption. This not only saves energy but also helps extend the pump's lifespan.

3. Low Noise and Vibration: The design of the screw vacuum pump ensures low noise and vibration levels during operation. This is beneficial for maintaining a quiet work environment and reducing wear and tear on the pump itself.

4. High Vacuum Performance: The screw vacuum pump offers excellent vacuum performance, with an ultimate pressure of 1 * 10-2 Torr (Torr). This makes it suitable for demanding applications that require a high degree of vacuum.

5. Simple Structure and Easy Maintenance: The pump has a relatively simple structure with no metal contact on rotating parts. This simplifies maintenance procedures and reduces maintenance costs. Additionally, the long service life of the pump further adds to its cost-effectiveness.

6. Versatility: The screw vacuum pump can be used in a variety of applications, including industrial machinery, semiconductor manufacturing, and other fields where vacuum conditions are crucial.

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What Is A Screw Vacuum Pump?

A screw vacuum pump is a type of vacuum pumping equipment that utilizes a pair of screws rotating synchronously at high speed within the pump casing to create suction and exhaust. It is a vacuum generation device that uses the meshing of the screw tooth profile to continuously transport the gas from the suction port to the exhaust port. This process creates a vacuum within the system. The screw vacuum pump has several distinct features and advantages.

Firstly, it has a simple and compact structure, which makes it easy to install and maintain. Secondly, it has a high vacuum degree and a large air pumping volume, which allows it to meet the requirements of various vacuum applications. Additionally, the screw vacuum pump has a stable operation and low noise, providing a reliable and quiet vacuum solution.

Due to its excellent performance and reliability, the screw vacuum pump is widely used in various industries, such as chemical, pharmaceutical, food processing, metallurgy, electronics, and aerospace. It is often used in vacuum distillation, vacuum drying, vacuum concentration, vacuum filtration, vacuum packaging, and other processes that require high vacuum levels or large gas handling capabilities.

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How Does The Screw Vacuum Pump Work?

The Screw Vacuum Pump operates on the principle of using a pair of screws that rotate synchronously at high speed within the pump casing. These screws are designed with precision to mesh with each other, creating a continuous seal as they rotate.

As the screws rotate, they trap and compress the gas between their threads, effectively pushing it from the inlet port towards the outlet port. The rotation of the screws creates a low-pressure area at the inlet, which allows gas or vapor to be sucked into the pump. As the gas is transported towards the outlet, it is compressed and expelled from the pump, creating a vacuum in the system.

The design of the screw vacuum pump allows for a continuous and smooth flow of gas, ensuring high pumping efficiency and low noise levels. Additionally, the absence of metal-to-metal contact between the rotating parts reduces wear and tear, resulting in a longer pump lifespan and reduced maintenance requirements.

Screw Vacuum Pump Main Application Areas

The screw vacuum pump finds its application in a wide range of industries and processes due to its high efficiency, stability, and ability to handle various gases and vapors. Here are some of the main application areas for the screw vacuum pump:

1. Chemical Industry: The screw vacuum pump is commonly used in the chemical industry for processes such as distillation, evaporation, crystallization, drying, and vacuum filtration. It effectively removes volatile components and creates the required vacuum conditions for various chemical reactions and separations.

2. Pharmaceutical Industry: In the pharmaceutical industry, the screw vacuum pump is used for vacuum drying, distillation, and crystallization of drugs and intermediates. It helps to remove solvents, moisture, and impurities, ensuring the purity and quality of pharmaceutical products.

3. Food Processing: The screw vacuum pump is suitable for vacuum packaging, dehydration, and concentration processes in the food industry. It can assist in removing excess moisture, oxygen, and other gases to extend the shelf life and improve the quality of food products.

4. Metallurgy and Mining: In the metallurgy and mining industries, the screw vacuum pump is used for vacuum degassing, vacuum smelting, and vacuum refining processes. It helps to remove impurities and gases from metals and minerals, improving their purity and quality.

5. Electronics and Semiconductor Manufacturing: The screw vacuum pump plays a crucial role in the electronics and semiconductor manufacturing industries. It is used for vacuum deposition, etching, and other processes that require high vacuum levels for precise manufacturing of electronic components and devices.

6. Research and Development: Laboratories and research facilities often rely on screw vacuum pumps for various experiments and processes that require controlled vacuum conditions. They are suitable for vacuum distillation, vacuum evaporation, and other experimental setups.

7. Environmental Applications: The screw vacuum pump can also be used in environmental applications such as vacuum collection and treatment of gaseous emissions, as well as in waste management and recycling processes.

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Proper operation of Screw Vacuum Pump

Proper operation of a screw vacuum pump is crucial for ensuring its efficient and reliable performance. Here are some key steps and considerations for the proper operation of a screw vacuum pump:

1. Pre-operation Checks: Before starting the pump, conduct a thorough inspection to ensure all connections are tight and secure, and there are no leaks or damage to the pump or its components. Check the oil level and ensure it is within the recommended range. Also, verify that the power supply is stable and suitable for the pump's requirements.

2. Starting the Pump: Once the pre-operation checks are complete, you can proceed to start the pump. Follow the manufacturer's instructions for the specific starting procedure, which may involve switching on the power supply and allowing the pump to warm up gradually.

3. Monitoring and Control: During operation, continuously monitor the pump's performance and conditions. Pay attention to any abnormal noises, vibrations, or changes in the exhaust temperature. Use the control panel or remote monitoring system to adjust the pump's settings and parameters if needed to maintain optimal performance.

4. Maintenance and Servicing: Regular maintenance and servicing are essential for the long-term performance of the screw vacuum pump. Follow the manufacturer's recommended maintenance schedule and procedures, which may include changing the oil, cleaning the filters, checking the seals, and lubricating moving parts. Additionally, inspect the pump regularly for any signs of wear or damage and replace worn-out components promptly.

5. Shutting Down the Pump: When it's time to shut down the pump, follow the manufacturer's instructions for the proper shutdown procedure. This may involve gradually reducing the pump's speed, turning off the power supply, and disconnecting any external connections.

6. Safety Precautions: Always operate the screw vacuum pump in a well-ventilated area, away from any flammable materials or sources of ignition. Wear appropriate safety gear, such as gloves and eye protection, when handling the pump or its components. Additionally, ensure that the pump is properly grounded to prevent electrical hazards.

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Technical development trends of Screw Vacuum Pump

The technical development trends of screw vacuum pumps are evolving continuously to meet the demands of increasing efficiency, reliability, and environmental friendliness in various industrial applications. Here are some key trends that are shaping the technical advancements of screw vacuum pumps:

1. Enhanced Efficiency: Manufacturers are constantly striving to improve the efficiency of screw vacuum pumps. This involves optimizing the pump's design, improving the rotor profile, and using advanced materials to reduce friction and internal leakage. Enhanced efficiency leads to reduced energy consumption, lower operating costs, and improved overall performance.

2. High Vacuum Capability: There is a growing demand for screw vacuum pumps that can achieve higher vacuum levels. Manufacturers are developing pumps with improved sealing and vacuum retention capabilities, enabling them to operate at lower pressures and handle more demanding applications.

3. Reduced Noise and Vibration: Noise and vibration are common challenges in vacuum pump operation. Manufacturers are focusing on reducing noise and vibration levels through innovative designs, precision manufacturing, and the use of vibration-damping materials. This not only improves the operator's comfort but also reduces the potential for mechanical damage and wear.

4. Durability and Reliability: Improving the durability and reliability of screw vacuum pumps is a crucial trend. Manufacturers are employing techniques such as precision machining, wear-resistant coatings, and robust materials to enhance the pump's lifespan and reduce the need for frequent maintenance or repairs.

5. Intelligent Control and Monitoring: The integration of intelligent control systems and remote monitoring capabilities is becoming increasingly common in screw vacuum pumps. These systems enable operators to monitor and control the pump's performance remotely, adjust operating parameters in real-time, and receive alerts for potential issues or malfunctions. This enhances operational efficiency, reduces downtime, and facilitates proactive maintenance.

6. Environmentally Friendly Design: With increasing environmental awareness, manufacturers are focusing on developing screw vacuum pumps that are more environmentally friendly. This involves reducing the pump's emissions, using eco-friendly materials, and optimizing the cooling system to minimize energy consumption and heat generation.

Screw Vacuum Pump Installation and Maintenance


1. Location Selection: Choose a location for the pump that is clean, dry, and well-ventilated. Ensure that the area is free from dust, debris, and excessive moisture, as these can affect the pump's performance.

2. Foundation and Mounting: Prepare a solid and stable foundation for the pump to minimize vibrations and noise. Follow the manufacturer's instructions for mounting the pump securely to the foundation.

3. Connecting Piping: Install the inlet and outlet piping according to the pump's specifications. Use appropriate pipe materials and sealing techniques to prevent leaks. Ensure that the piping is correctly aligned and free from bends or kinks that could restrict flow.

4. Electrical Connections: Follow the manufacturer's guidelines for connecting the pump to the power supply. Use the correct wire gauge and insulation, and ensure that all electrical connections are secure and grounded.

5. Initial Inspection: Perform a thorough inspection of the pump and its components before installation. Check for any damage or missing parts and ensure that all components are in good condition.


1. Regular Checks: Conduct regular checks of the pump's operation, including checking for leaks, vibrations, and excessive noise. Monitor the pump's performance parameters, such as vacuum level and flow rate, to identify any abnormalities.

2. Lubrication: Ensure that the pump's lubrication system is properly maintained. Check the oil level regularly and replace the oil as per the manufacturer's recommendations. Use the specified oil type and viscosity to ensure optimal lubrication.

3. Cleaning: Keep the pump and its surroundings clean. Regularly clean the pump's exterior and internal components to remove dust, dirt, and oil residue. Use appropriate cleaning agents and techniques to avoid damaging the pump's surfaces.

4. Replacement Parts: Replace worn or damaged parts promptly. Follow the manufacturer's recommendations for part replacement and use genuine replacement parts to ensure compatibility and performance.

5. Record Keeping: Maintain a maintenance record for the pump, including the dates of inspections, oil changes, and part replacements. This will help track the pump's maintenance history and identify any potential issues or patterns.

Why choose HZPT?

 1. QUALITY PRODUCTS: HZPT is committed to providing the highest quality screw vacuum pumps. Our products are precision-engineered and manufactured from advanced materials to ensure durability, reliability, and consistent performance.

2. Comprehensive Service: We pride ourselves on providing exceptional service to our customers. Our dedicated team of professionals is ready to answer your questions, provide technical support, and provide solutions tailored to your specific needs.

3. Competitive Prices: HZPT offers competitive prices without compromising on quality. We believe in creating value for our customers and work hard to ensure that our products are competitively priced, making them suitable for every budget.

4. Excellent After-Sales Support: We know that a product is only as good as the support you receive after purchase. HZPT provides comprehensive after-sales service, including timely repairs, replacements and maintenance, ensuring your vacuum pump remains in top condition longer.

5. Wide product range: HZPT offers a wide range of vacuum pumps to meet different applications and requirements. From water ring vacuum pumps, screw vacuum pumps to slide valve vacuum pumps, we can provide you with the right products.