The sealing elements used in truck-mounted concrete pumps are of vital importance for the efficient operation of the pump. Rubber and Delrin are commonly used materials in the production of sealing elements. Rubber is often preferred in the production of sealing elements due to its flexibility and durability, while Delrin is preferred due to its high strength and wear resistance.

Sealing elements are designed to control the pressure in the hydraulic system of the pump. These elements maintain the seal to ensure efficient operation of the pump and also extend its life.