... also called “Valve Seat Puller” is a service tool, consisting of hydraulic pump assy., pressure gauge, puller head, hose coupling assy., stem ... , jack, wing nut, hex nut, which is used in the drilling sites for pulling the installed valve seats ... -1700-PT, NATIONAL 7P50, 8P80,9P100,10P130, 12P160. This hydraulic valve seat puller was developed for two reasons: A. To eliminate ...