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The slurry pump throat bush is a critical wetted part of a horizontal centrifugal slurry pump system. Located at the entrance of the pump’s impeller on the inside of the outer casing, it combines with the volute liner and frame plate liner insert to form the pump chamber that surrounds the impeller and helps guide the slurry into the impeller, ensuring a smooth flow. The throat bush acts as a protective barrier against wear caused by abrasive slurry.
Our premium throat bush is made from high chrome alloy materials, including A05, A49, A33, among others. It is engineered to manage highly abrasive or corrosive slurries across various sectors such as mining, mineral processing, coal washery, metallurgy, power generation, chemicals, and environmental services. Proudly produced in our Chinese factory, we provide robust and effective slurry pump throat bush at competitive prices with reduced lead times.
The throat bush in a slurry pump is a critical component that contributes to the pump’s efficiency, longevity, and reliability by providing wear protection, maintaining a proper seal, and aiding in the hydraulic performance of the pump. Regular maintenance and proper material selection are essential for ensuring optimal pump operation.
1. Wear Protection: The throat bush acts as a protective barrier against wear caused by abrasive slurry. Slurry pumps are commonly used in industries where the pumped fluid contains solid particles, and these particles can cause wear on pump components. The throat bush helps minimize wear on the pump’s interior surfaces, particularly in the area where the slurry enters the impeller.
2. Sealing: Another important function of the throat bush is to help create a seal between the suction side and the pressure side of the pump. This is essential for maintaining efficiency and preventing leakage. A well-maintained throat bush contributes to the overall sealing integrity of the pump.
3. Maintaining Hydraulic Performance: The design of the throat bush is crucial for maintaining the hydraulic performance of the pump. It helps guide the slurry into the impeller, ensuring a smooth flow and preventing turbulence that could negatively impact efficiency.
4. Easy Replacement: Given that the throat bush is subjected to wear over time, it’s designed to be replaceable. This allows for easier maintenance and extends the overall lifespan of the pump. Regular inspection and replacement of the throat bush are important aspects of pump maintenance.
5. Material Selection: The material used for the throat bush is chosen based on the characteristics of the pumped slurry. Common materials include high chrome alloy, rubber, polyurethane, and ceramic, selected for their wear resistance, corrosion resistance, and durability.
The diagram below illustrates the basic structure of the SH series heavy-duty slurry pumps featuring a high chrome alloy throat bush. The wetted parts made from other materials are interchangeable, while the non-wetted parts remain identical across different configurations.
The following materials are commonly used for slurry pump throat bush liners, with A05 high-chrome alloy being the most frequently used. Depending on the specific characteristics of the slurry and user requirements, options such as rubber, polyurethane, or ceramic are available. For exceptionally unique working conditions, we also provide customized services. Please feel free to consult our sales engineers for more information.
A05 27%Cr, Wear-resistant White Cast Iron.≥58HRC For abrasive wear with larger impact loads, suitable for working conditions with pH value of 5~12. A49 28%Cr, Wear-resistant and Corrosion-resistant Cast Iron.≥43HRC Suitable for corrosive environments with low pH, 3.5≤PH≤13, especially suitable for flue gas desulfurization with PH≥4 device, usually used in low-acid environments. A33 33%Cr, Wear-resistant and Corrosion-resistant Alloy.≥35HRC Used to transport oxidizing slurry with PH≥1, such as phosphogypsum, nitric acid, sulfuric acid, and phosphoric acid.
A05 27%Cr, Wear-resistant White Cast Iron. Hardness≥58HRC. For abrasive wear with larger impact loads, suitable for working conditions with pH value of 5~12. A49 28%Cr, Wear-resistant, Corrosion-resistant Cast Iron. Hardness≥43HRC. Suitable for corrosive environments with low pH, 3.5≤PH≤13, especially suitable for flue gas desulfurization with PH≥4 device, usually used in low-acid environments. A33 33%Cr, Wear-resistant, Corrosion-resistant Alloy. Hardness≥35HRC. Used to transport oxidizing slurry with PH≥1, such as phosphogypsum, nitric acid, sulfuric acid, and phosphoric acid.
Natural Rubber R55 Black medium hardness natural rubber with excellent wear and corrosion resistance, suitable for conveying slurry of fine to medium particles without sharp corners. Natural Rubber R08 Back medium hardness natural rubber for impeller, used for impellers where superior corrosion resistance is required in fine particle slurries. Natural Rubber R26 Back soft natural rubber for liner, used for liner where superior corrosion resistance is required in fine particle slurries. Polyurethane PU01 Elastomer material more wear-resistant than natural rubber, The wear resistance is 3-5 times that of natural rubber, and it is resistant to oil, hydrolysis and corrosion.
Natural Rubber (R55)Black medium hardness natural rubber with excellent wear and corrosion resistance, suitable for conveying slurry of fine to medium particles without sharp corners. Natural Rubber (R08)Back medium hardness natural rubber for impeller, used for impellers where superior corrosion resistance is required in fine particle slurries. Natural Rubber (R26)Back soft natural rubber for liner, used for liner where superior corrosion resistance is required in fine particle slurries. Polyurethane (PU01)Elastomer material more wear-resistant than natural rubber, The wear resistance is 3-5 times that of natural rubber, and it is resistant to oil, hydrolysis and corrosion.
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