National 12P-160 Mud Pumps QT-4

National 12-P-160 Triplex Mud Pump — Spec Sheet

General Specs

• Rated Input Power: 1,600 HP (~1,193 kW) at 120 strokes/minute (SPM)

• Stroke Length: 12 in (~304.8 mm)

• Maximum Fluid Cylinder Liner (Bore): 7¼ in (~184.2 mm)

• Gear Ratio (Crank vs Pinion): 3.439 : 1

Dimensions & Weight

• Floor-to-suction center height: ~ 16½ in (419 mm)

• Floor-to-discharge center height: ~ 45¼ in (1,149 mm)

• Overall length over skids: ~ 209 in (5,309 mm)

• Width over frame: ~ 78⅝ in (1,997 mm)

• Width over pinion shaft: ~ 113¾ in (2,889 mm)

• Height to top of gear case: ~ 75 in (1,905 mm)

• Height over fluid cylinders: ~ 62 in (~1,599 mm)

• Weight (complete, minus sheave): ~ 54,700 lbs (≈ 24,810 kg)

Connections & Flanges

• Suction: 10-inch ASA-150 lb R.J. flange

• Discharge: 6-inch API-10,000 lb R.J. flange

Hydraulic / Fluid End

• Hydrostatic Test Pressure of Standard Fluid Cylinders: 11,250 psi (~791 kg/cm²)

Performance / Flow Data (select liner bores at 120 SPM)

(Flows drop with smaller pressure or lower SPM; these are reference numbers at 120 SPM with standard liner sizes.)