Designers & Builders of Tank Trucks since 1948

NOTE: Models GX2B and GX2.5B are no longer available. PUMP END parts will be available for 5 years. The GX2B and GX2.5B GEAR REDUCTION UNITS are no longer available, and parts for them will be obsoleted as inventory is depleted. Blackmer GNX(H) models have replaced the GX series. Please see the informational link on the 'Blackmer Motor Driven Pumps' page of our web store for GNX(H) models.

GX3E and GX4B models will be obsoleted around the 3rd quarter of 2018 and replaced by their own GNX(H) models. Plans for parts support are the same as for the 2" and 2-1/2" models noted above.

Unit of Measure

Package Type

N/A Each

Units Per Package

N/A 1


N/A 2 1/2 "



Vendor Item #

N/A GX2.5B

Seal Type


Inlet Flange

N/A 2 1/2" FNPT

Outlet Flange

N/A 2 1/2" FNPT

N/A Blackmer's GX type pumps are designed to handle a wide range of non-corrosive, non-abrasive industrial liquids and petroleum products. Typical applications include fuel oils, lube oils, jet fuels, gasoline, edible oils and a variety of solvents and thinners such as esters, ketones, naphthas, ethers, amines, aromatics, alcohols, terpenes, glycols and many other similar liquids.

N/A Blackmer's positive displacement rotary pumps utilizing their unique sliding vane design offers the best combined characteristics of sustained high level performance, energy efficiency, trouble-free operation and low maintenance cost. Also, the high suction lift capability of these pumps makes them especially suitable for pumping from underground tanks, bulk plant service and aircraft refueling.

N/A Blackmer's GX series models are available in 3 and 4-inch flanged port sizes with capacities UP to 520 U.S. gpm (114-1,855 L/min). Cast iron construction is standard on all models. All models have external ball bearings isolated from the pumpage by mechanical seals.

The GX type pumps feature an integral head-mounted gear reduction drive with oil lubricated, hardened helical gears that provide quiet trouble-free operation. Gear shafts are supported at both ends by ball bearings for smooth operation and long life. A splined shaft simplifies alignment of the pump and reducer, and the reducer can be rotated on the pump head to accommodate a variety of motor sizes without shimming.

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