Rotor Pump With Water-proff Cover
We are a world-leading technology-based enterprise
focus on R&D and manufactures non-Newtonian fluid conveying equipment. We
specialize in rotary pumps, homogeneous pumps and grinding pumps. We have
obtained 11 invention Patents and 46 practical patents, and won many national honorary
titles.
Twin-rotor
lobe pump are multi-functional and bi-directional positive displacement pumps,
produced with fine technology. These products use synchronic rotors, driven by
a pair of synchronic gears in the gear box. Transmitted by the main shaft and
the sub-shaft. The rotors move synchronically in counter-clockwise a
directions, which, consequently, varies the pump capacity and builds up high
vacuum capacity and emission pressure. It is particularly suitable to pump
sanitary medium, high-corrosive and high-viscous medium.
Rotor
pump with water-proff cover: The pump is equipped with a detachable protective
cover for the whole machine, and the material is S.S., it can protect the
motor, coupling and other parts from corrosion during on-site cleaning.
In
the past 30 years, we dedicate to provide the scientific and professional
solutions in fluid field. In the field of complex fluid transportation, our
company's R&D technology, manufacturing technology, application technology is
at the leading position in the world.
Durrex pumps can be widely used in food, consumer chemical, refined
chemical, paper making, chemical fiber, pharmaceuticals, coating, etc. We will
continue to focus on scientific research and innovation, improve the level of
precision manufacturing, and continuously promote the intelligent development of
fluid transportation industry, to create greater value for global users
Rotor pump water-proff cover, Lobe Pump with water-proff cover, Rotary pumps with water-proff cover, Rotary lobe pumps water-proff cover, Stainless Steel Rotor pumps water-proff cover NINGBO DURREX PUMPS CO.,LTD , https://www.durrexlobepump.com
**China Aluminum Industry Network: Understanding the Factors Behind Low-Quality and Cheap Aluminum Profiles**
1. **Alloy Elements**
6063 aluminum alloy is primarily composed of aluminum, magnesium, and silicon. Each element has a specific allowable range, with magnesium being relatively expensive. To cut costs, some manufacturers reduce the magnesium content below the standard, which significantly lowers the mechanical strength of the final product. In some cases, they even add scrap materials like old wires or used aluminum pots, which can result in an alloy that’s barely 6063. The outcome is weak profiles that can be bent easily by hand—often referred to as "soft as noodles." This is one of the main reasons why such aluminum is sold at a fraction of the price.
Reputable manufacturers, on the other hand, follow strict internal standards for alloy composition. Within the acceptable elemental ranges, each factory maintains its own narrower specifications, especially for the ratio of aluminum, magnesium, and silicon. These formulas are usually confidential, and only those that meet these precise standards can guarantee consistent quality. Any deviation from these guidelines often leads to subpar performance.
2. **Aluminum Alloy Melting Furnaces**
The type of melting furnace used plays a critical role in the quality of 6063 alloy. In China, the technology varies widely—from outdated coal-fired furnaces to modern electrically heated ones. Some manufacturers still use old helium boilers, which lack proper exhaust systems. Others use gas, oil, or coal, but many don’t have chimneys, leading to incomplete combustion and poor melt quality.
Modern circular furnaces, especially those equipped with static furnaces, offer better control over impurities and slag. These advanced systems allow for cleaner melts, resulting in higher-quality aluminum rods for extrusion. Poorly melted alloys often contain bubbles and inclusions, which directly affect the quality of the final product. This is another reason why some aluminum is sold at a much lower price.
3. **Alloy Casting**
Casting techniques also vary greatly across Chinese factories. Older iron mold casting methods produce inferior crystal structures with more slag and bubbles, while modern hydraulic semi-continuous casting offers better results. Semi-continuous casting allows for longer, more uniform rods, typically ranging from 3 to 8 meters. These rods are cooled evenly from all sides, leading to a fine and consistent microstructure.
Hydraulic casting produces smoother surfaces compared to traditional methods, which is essential for high-quality extrusion. Some manufacturers even sand the surface of rough cast rods before extrusion to improve the final profile quality. Advanced horizontal casting molds can produce multiple rods at once, ensuring consistency and efficiency. However, many smaller factories still rely on outdated equipment, leading to inconsistent and lower-quality products.
4. **Profile Extrusion**
Extrusion presses in China vary in quality, from simple homemade machines to advanced hydraulic presses imported from Japan, the U.S., and Germany. High-quality extruders ensure better dimensional accuracy and surface finish. For example, American-made 6063-T5 is known for its superior performance in architectural applications.
In terms of heat treatment, 6063 profiles undergo quenching and aging. Quenching involves rapidly cooling the material after heating, similar to how steel blades are hardened. After quenching, the profiles are aged in a furnace to improve their mechanical properties. Unlike other metals, aluminum alloys exhibit a time-dependent strengthening effect, making this process crucial for achieving optimal performance.
In summary, the quality of 6063 aluminum profiles depends on several factors, including alloy composition, melting techniques, casting methods, and extrusion equipment. Understanding these elements helps explain why some aluminum is cheaper but often of lower quality.