National 12P-160 Mud Pumps Used QT-3

Power Rating: 1,600 hp (1,193 kW) at 120 strokes per minute (spm)
Stroke Length: 12 in (304.8 mm)
Maximum Fluid Cylinder Liner Bore: 7¼ in (184.2 mm)
Hydrostatic Test Pressure (Fluid Cylinders): 11,250 psi (791 kg/cm²)
Gear Ratio: 3.439:1
Suction Connection: 10″ ASA‑150 lb raised-face flange
Discharge Connection: 6″ API 10,000 psi raised-face flange
Valve Pot: API Model 7
Weight (Complete, Less Sheave): ~54,700 lb (24,810 kg)
Operates across multiple liner sizes; performance figures at 120 spm for select bore sizes:
Complete performance curves—varying liner sizes, speeds, and efficiencies—are available in engineering datasheets
Height to Center of Suction: 16½ in (419 mm)
Height to Center of Discharge: 45¼ in (1,149 mm)
Overall Length (over skids): 209 in (5,309 mm)
Width over Frame: 78 in (1,997 mm)
Width over Pinion Shaft: 113¾ in (2,889 mm)
Height (floor to top of gear case): 75 in (1,905 mm)
Height Over Fluid Cylinders: 62 in (1,599 mm)