Our company’s cast iron impellers, primarily made of HT250 gray iron, utilize advanced design to minimize fluid leakage, achieving efficiencies of 80%-90%. Closed impellers utilize a double cover plate structure to reduce axial thrust and extend bearing life. Open impellers feature adjustable clearances for long-term stable operation. The wear-resistant material withstands harsh opera... https://castingsr.com/gray-cast-iron-parts/impeller-casting