1. PZG (PZ-7) Triplex Drilling Mud Pump Standard Features Nodular iron power frame, eccentric, connection rods, and crossheads Double-row-spherical roller Beamings carry eccentric Double extended Jackshaft carried on heavy-duty straight roller bearings Dual roller bearing connecting rod Heat-treated alloy steel main gears are bolted to the eccentric Replaceable bronze crosshead slides Full splash