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WVSD stainless steel submersible sewage pump adopts double-channel series mechanical seal. The material is hard and corrosion-resistant tungsten carbide, durable and wear-resistant, which can make the pump run safely and continuously. This pump adopts large-flow anti-blocking hydraulic component design, which greatly improves the ability of dirt to pass, and can effectively pass 5 times of fiber material of pump diameter and solid particles with diameter of about 50% of pump diameter.