Available in 2, 2.5, 3, and 4 in. sizes, NPH and XH Series feature internal relief valve that protects against excessive pressures, symmetrical bearing support that promotes extended life, as well as self-priming and dry-run capabilities. Suction-lift capability suits pumping from underground tanks, bulk-plant service, and aircraft refueling. While XH pumps handle non-corrosive and non-abrasive industrial liquids and petroleum products, NPH Series handles viscous or shear-sensitive fluids.