B series transfer pumps provide efficient pumping of #1 to #6 type oils, in capacities from 80 to 290 gallons per hour (based on 1725 rpm), pressures up to 500 psi (350 psi with #2 oil). B series pumps offer superior durability and high mechanical efficiency.  Double lip Viton seals are standard. B series pumps are hub mounted (factory mounted adaptor is included), and are available in right-hand or left-hand cofiguration. 18B, 37B, 47B series pumps have 1/2" NPTF porting, and the 59B series pump has 3/4" side inlet and side outlet porting. UL listed.