An impeller is a rotating component of a centrifugal pump, usually made of iron, steel, or other metal which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation.
Usually, the impeller is made of metal, but there are some disadvantages of the metal material. The disadvantage of the metal impeller is that it is more expensive than the plastic one. Also, it is not as versatile in its applications as a plastic impeller. For example, you can use a plastic impeller in either an acidic or alkalic environment, but the metal one will corrode, so you have to be careful where you use it.
For those concerns, the plastic impeller become more and more popular. The materials must have high mechanical strength, good chemical resistance, good dimensional stability, and be easy to machine. So, PEEK, PEEK CF30, and PPS GF40 are the most commonly used materials.
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PEEK is a high-performance engineering thermoplastic that offers excellent chemical resistance and superior mechanical properties. PEEK plastic is widely used in the aerospace, automotive, chemical processing, oil and gas, and medical industries due to its unique set of properties. For the impeller application, usually, use the PEEK plastic rod with the 5-axis CNC machining center to finish the product.
PEEK is inherently strong and stiff as well as resistant to degradation from many chemicals at both high and low temperatures. This combination of properties makes PEEK a good material choice for applications that require high strength, rigidity, and stiffness.
Why use PEEK plastic to produce impeller?
1. PEEK with high density, low shrinkage, no warpage, dimensional stability is good;
2. PEEK has good mechanical strength, impact strength can reach 100KJ/M2;
3. PEEK has excellent chemical resistance, strong acid and alkali resistance;
4. PEEK has aging resistance and cold resistance;
5. PEEK plastic can be used in the temperature range of -100℃~260℃;
6. PEEK is the most ideal engineering plastic for bearing materials at present.
PEEK CF30 impeller
PEEK CF30 is a 30% carbon fiber reinforced, high-performance polymer. It is an ideal plastic for the manufacture of impellers due to its high strength, stiffness, low creep, and dimensional stability. PEEK also has excellent mechanical properties at both low and elevated temperatures. It also exhibits resistance to many chemicals and solvents.
Due to adding the 30% carbon fiber, the mechanical strength of PEEK CF30 is enhanced, and the material could use in a more harsh working environment. If you want to machine the components yourself, check the PEEK CF30 rod page for material information and the PEEK machining guide page for machining tips.
Using PEEK CF30 plastic to produce an impeller has many advantages, including:
● Durable. One of PEEK CF30 plastic’s greatest advantages is its fatigue and wear resistance. This makes it suitable for use in areas where there is a lot of friction, such as in an impeller.
● Corrosion resistance. Another reason why PEEK CF30 plastic is ideal for making an impeller is that it can resist corrosion from both harsh chemicals and water. This makes it suitable for use in a variety of different industries, including food processing and medicine.
● Low friction coefficient. Because PEEK CF30 plastic has low friction properties, using it to make an impeller minimizes wear on other parts, which means they will last longer before needing replacement.
● Long lifetime under high-temperature conditions. If you use PEEK-CF30 material to make an impeller, the high-speed rotation would cause a temperature rise, and the carbon fiber could conduct the heat and make the component longer lifetime.
PPS GF40 impeller
PPS GF40 is a 40% glass fiber reinforced PPS. The product has excellent mechanical and chemical resistance, high thermal stability, good electrical insulation properties, and low moisture absorption. PPS GF40 offers excellent resistance to hydrocarbons, aromatics, halogenated hydrocarbons, and alcohols. PPS will maintain its mechanical properties at elevated temperatures and in moist environments with limited exposure to alkalis. This grade is resistant to most acids with the exception of concentrated sulphuric acid. For the PPS GF40 rod, which is usually chosen to machine the impeller, we have many sizes in stock.
The advantages of using PPS GF40 are as follows:
1. Cost-effectiveness: As a thermoplastic material, PPS GF40 is much cheaper than metal parts or carbon fiber parts, which can help reduce the cost of producing impellers.
2. Time-saving: Compared with metal parts or carbon fiber parts, PPS GF40 has less production time consumption and faster delivery, which can help save time in the process of producing impellers.
3. Good performance: The mechanical properties of PPS GF40 are outstanding, which can guarantee the performance of produced impellers.
Different materials have their own properties, choosing the right material should according to the working conditions and applications. Contact us for the material selection if you are facing a problem.