Applications of screw vacuum pumps

I sell this kind of pump; it’s imported from Europe. The limit can reach the PA level. But this data is generally not useful for chemical processes, as the vacuum in typical processes is on the order of hPa or higher. The effect is naturally very good, but it still depends on the manufacturing process, right? The lifespan depends on the place of origin; those from Europe are naturally better than those from Asia.

What does HPA level mean? Please advise

Screw vacuum pumps have many advantages: they can operate for up to 400,000 hours, achieve a vacuum level of 0.5 torr, and do not require sealing water. Although their price is relatively high, they save a significant amount on water costs; taking subsequent expenses into account, their actual cost is still relatively low

Low energy consumption, low noise, minimal maintenance; used in industries such as printing, hospitals, electronics, and packaging

Advantages of dry screw vacuum pumps: 1. The greatest advantage is energy conservation, environmental protection, emission reduction, and improved efficiency. Replacing steam jet pumps, it achieves an effective energy savings rate of over 85% with no wastewater discharge. 2. It possesses an extremely strong ability to remove condensable gases, including pure solvent gases, enabling gas-liquid separation as well as precise diversion and recycling of these gases ； It can achieve substantial drainage, and in actual use, it can drain while continuing to operate normally. 3. Obtain a clean vacuum environment. It effectively improves production efficiency and enhances product quality. Sealing methods that include skeleton seals, mechanical seals, and special seals ensure a safe separation between the pump chamber and the oil tank. 4. It features a wide vacuum range (105–10-1), can start under normal pressure, continuously draws and discharges air to the atmosphere, and allows the vacuum level to be adjusted according to the user’s process requirements. 5. This pump features a function that allows it to be cleaned without disassembly; when there is a large amount of dust, viscous substances, or other foreign materials present during use, the pump can be cleaned within half an hour to meet the factory’s standards, ensuring stable operation. 7. The gas flow channels are coated with an anti-corrosion coating, offering corrosion resistance and suitability for conditions with dust and liquid present. 8. Wide range of applications, capable of meeting the requirements of all production processes in industries such as petrochemicals, pharmaceuticals, electronics, aerospace, nuclear industry, and laboratories. It can form a high-vacuum system together with molecular pumps and Roots pumps. 9. This pump can truly achieve large-volume liquid discharge, and it is capable of discharging liquid while operating normally in actual use. Comparison of other vacuum pumps with dry vacuum pumps: Water ring pump (liquid ring): Common problems include the fact that it is a medium-based vacuum pump; during operation, the material to be evacuated mixes with the medium, resulting in low vacuum levels. Additionally, the costs associated with recovering the material and treating wastewater are high, and it can easily cause environmental pollution. Dry screw pump: a vacuum pump that operates without any medium; it creates a clean vacuum with high vacuum levels. When used in combination with a Roots pump, it enables even higher vacuum levels. The material processed remains pure, and it can be recovered 100% without any contamination, eliminating the need for wastewater treatment. It meets environmental standards, and it performs particularly well in the production of pharmaceutical intermediates. Vane pump: Common problems: As a vacuum pump that handles media, it is prone to backflow during operation; the condensable gases drawn in can liquefy, resulting in a decrease in vacuum level. The vacuum oil needs to be replaced regularly, resulting in high maintenance costs. Dry screw pump: a vacuum pump that operates without any medium, creating a clean vacuum environment with no backflow. The liquid discharged during operation can be collected and processed centrally, which helps maintain a constant vacuum pressure; moreover, it requires no maintenance costs. Reciprocating pumps (W pumps, piston pumps): Common issues: These vacuum pumps create a vacuum environment through the relative movement of a cylinder and a piston. In the chemical industry, when dealing with crystalline substances, this can cause damage to the piston or cylinder, leading to production disruptions. It is also not suitable when the gas being drawn contains a large amount of liquid. Dry screw pump: a vacuum pump that operates without any medium, featuring a friction-free design and variable-volume compression mechanism. In the chemical and electronics industries, it can effectively remove crystalline substances without causing damage to the pump itself. Steam pump: Common problems include high energy consumption, low vacuum level, high costs for wastewater treatment, and the potential to cause significant environmental pollution. It has high steam consumption (resulting in high operating costs), must be installed at a height of over 11 meters, and is difficult to maintain. Dry pump: Energy-efficient and environmentally friendly; the materials can be recycled and reused, causing no pollution to the environment. At the same time, there is no height limit installed. Vortex pump: Common issues: Medium-free vacuum pump, suitable for clean vacuum applications. However, the amount of liquid produced by condensable gases in the working environment shall not exceed 25 grams per day. Work environments with dust can cause wear and damage to turbines. Dry screw pump: a vacuum pump without a medium, suitable for clean vacuums. The liquid produced by condensable gases in the working environment can be discharged during pump operation, with no maintenance costs. Dry vacuum pumps are widely used in various vacuum generation applications. In the petrochemical industry, they are employed in processes such as reduced-pressure evaporation, crystallization, distillation, sublimation, drying, negative-pressure concentration, dehydration, chemical reaction absorption, and vacuum transportation of materials. In the pharmaceutical industry, they are used for vacuum evaporation, filtration, monomer recovery, material transportation, distillation, crystallization, sublimation, drying, and deodorization. In the electronics industry, they are utilized in processes such as coating, molecular beam epitaxy, ion etching, and impregnation. In various laboratories, they can be used for a wide range of vacuum generation processes, as well as fractional distillation and rectification. In the aerospace industry, they are applied in processes such as coating, space environment simulation, brazing, and electron beam welding. In the metallurgy industry, they are used for melting, refining, casting, distillation, degassing of molten steel, and heat treatment. In the biological industry, they are employed in processes such as vacuum evaporation, distillation, sublimation, drying, dehydration, preservation, and packaging. 1) Vacuum level: Dry screw vacuum pumps, claw vacuum pumps, and oil-free rotary vane vacuum pumps all achieve very high ultimate vacuum levels, with the highest ultimate vacuum reaching 1–2 Pa. Oil-free reciprocating vacuum pumps, on the other hand, are designed for rough vacuum applications, with lower ultimate vacuum levels; therefore, they need to be used in combination with Roots vacuum pumps to achieve higher vacuum levels. 2) Pumping capacity: Due to their internal structure, oil-free scroll vacuum pumps have a low pumping capacity and are suitable only for processes that require low levels of vacuum. Dry screw vacuum pumps come in a wide range of models, making them suitable for processes that require high pumping capacities; when used in combination with rotary vane vacuum pumps, they can meet the needs of various customers. 3) Stability: Dry screw vacuum pumps feature stable performance, low noise levels, and a low failure rate; oil-free reciprocating vacuum pumps have a simple structure but generate higher noise levels, and their slides need to be replaced frequently. Due to its complex assembly process, in claw-type vacuum pumps the rotor is not integrated with the shaft; when a fault occurs, the entire unit must be disassembled and reassembled, and repeated assembly processes reduce the performance and stability of the product. 4) Special treatment: Since process gases in industries such as chemicals and pharmaceuticals contain flammable, explosive, and corrosive gases to varying degrees, dry vacuum pumps require special treatment. The dry screw vacuum pump has a simple internal structure; both the rotors and the pump chamber can be treated to resist corrosion, with nickel-phosphorus coating and Teflon coating available as options. It is difficult to apply anti-corrosion treatments to claw-type vacuum pumps; surface treatment is almost impossible to carry out between the various partitions, and the anti-corrosion coating on the rotor surface can also be damaged during assembly. Oil-free vortex vacuum pumps are only suitable for pumping clean gases; they cannot be used to pump flammable, explosive, or corrosive gases

Our company acts as an agent for Korean-brand screw vacuum pumps, which are used in many pharmaceutical factories across the country. If you have any questions, feel free to contact me via QQ at 1326493784

This post was last edited by Maken Learns Rock on 2014-2-10 at 11:48. Dry screw vacuum pumps are widely used; thanks to their energy-saving and environmentally friendly design, they represent a new type of equipment in the pharmaceutical and chemical industries today.

Vertical claw-type vacuum pumps for chemical applications have advantages over screw pumps