Polyurethane elastomer is a polymer material between plastic and rubber for wetted parts of slurry pump, and its molecular structure contains a polymer with repeated chain links of amino acid esters. It is gradually polymerized from isocyanate monomers and compounds containing active chlorine.
Due to the molecular structure of polyurethane elastomer containing a large number of polar bonds and stable chlorine bonds between molecules, it has many excellent properties, especially good physical and mechanical properties and wear resistance.
Polyurethane elastomer has physical and mechanical properties similar to rubber, as well as processing and forming characteristics similar to plastic.
Advantages of Polyurethane elastomer as material of wetted parts of slurry pump:
1) Wide adjustable range of performance. Multiple physical and mechanical performance indicators can vary within a certain range through the selection of raw materials and adjustment of composition, thereby meeting the different requirements of users.
(2) Excellent performance on wear resistance as wetted part of slurry pump. Especially under working conditions with wetting media such as water and oil, its wear resistance is often several to tens of times as that of ordinary rubber materials.
(3) Processability. Polyurethane elastomeric products can be mechanical processed such as turning, milling, and drilling.
Polyurethane elastomer has excellent operation effect when applied for slurry pump wetted parts.Now let's compare polyurethane elastormer with high chrome
cast iron and rubber.
Polyurethane elastomer VS high chrome cast iron as material of wetted part of slurry pump
1) Lifespan: Polyurethane elastomer has 6~10 times lifespan as that of high chromium cast iron when used for mud pumps, and 3 times as the lifespan of high chromium cast iron when used in slurry pumps.
(2) The weight of the slurry pump's impeller made of polyurethane is greatly reduced, and the surface of the wetted part of slurry pump is smooth, reducing electric consumption during rotation. Therefore, it can save about 20% of electricity and improve the efficiency of theslurry pump by 5% to 10%. At the same time, the weight reduction of the rotor also extends the service life of the bearing components, reduces the failure rate of pump operation, reduces maintenance costs, and reduces downtime losses caused by maintenance.
(3) Polyurethane has good vibration resistance and absorption performance, which can reduce pump vibration and noise to a certain extent.
Polyurethane elastomer VS rubber as material of wetted part of slurry pump
1) Polyurethane has wide hardness range from 20 to above 95(Shore A).Polyurethane is still elastic with elongation at high hardness degree,while lots of packing shall be mixed with rubber at the cost of lowering elasticity and performance.
2) Polyurethane has better performance on tear strength and about 2 times as natural rubber.
(3) Wear resistance of polyurethane is about 3-5 times as natural rubber.
(4)Polyurethane wetted parts could be cut and machined within a certain hardness range.
(5)Polyurethane is dyeable and could be made to product of any color.
