... in supply series of mud system equipments, also supply quality valve seat puller and its accessories. Valve seat extruder also called “Valve ... Seat Puller” is a service tool, consisting of hydraulic pump assy., ... -PT, NATIONAL 7P50, 8P80,9P100,10P130, 12P160. This hydraulic valve seat puller was developed for two reasons: A. To eliminate ...