... Valve assembly and valve spring for Mud pump expendablesWe supply products include as following:High-chrome Mud Pump Liner (Bimetal liner),Chrome-plated ... Seat,Full-open Valve and Seat (KQ/G2/FO),Valve Spring,Long-life Bonded Piston with RubbersFabric Long-life Bonded Piston ... Gasket,Module (Fluid ends),Ceramic Liner. Valve assembly and valve spring for Mud pump