NOV FB-1600 mud pump

The FB-1600 is a 1,600 horsepower triplex mud pump. NOV rates it at 1,600 horsepower at 120 strokes per minute. The maximum liner and stroke is 7 by 12 inches, and the gear ratio is 4.31:1. Discharge is a 5-inch API flange published at 7,500 psi.

It belongs on a land rig that circulates with 1,600 horsepower pumps, usually two or three of them. The 7,500 psi discharge is the reason people shop for an F-series pump instead of a standard 5,000 psi 12-P-160 fluid end. Confirm the discharge iron and the relief valve on the rig are rated with the pump.

The FC-1600 is published with the same horsepower, liner, stroke, and gear ratio. The suffix is the frame generation, so power-end and fluid-end parts are not automatically interchangeable. A 12-P-160 is also 1,600 horsepower, with a longer stroke identity (12 inches), a larger maximum liner (7¼ inches), and a different gear ratio. Do not buy FB expendables for a 12-P-160.

Confirm the listing is an FB and not an FC, and that the fluid end is the 7,500 psi module you expect. Valve pots are valve-over-valve API No. 7, with a metal-to-metal liner lock. Ask whether the motors and the belt or chain drive are included.