This equipment is the core product of paste backfill and pumping system, which is widely used in the fields of paste backfill in metal mines, high concentration discharge of tailings, sewage treatment in metallurgy and petrochemical industries, and solid waste treatment, and it provides safe and reliable long-distance conveying equipment for high solid content and viscous fine-grained materials with complex composition. It adopts unique conical distribution valve with good sealing and long life of wearing parts. The maximum outlet pressure is up to 21MPa, and the maximum conveying capacity is 500m³/h.