Gear Pump/ Internal Gear Pump is easy to maintain and has only two moving parts. The Pump has adjustable end clearance for low or high viscosities, high temperatures, or to compensate for wear over time. The Pump has shaft seal options such as including packed gland, lip seal, component seal, cartridge seal and sealless mag drive options. The Pump has porting options such as broadest selection of port locations, configurations, and types. The Pump has minimal pulsation for accurate flow measurement and has one shaft seal. The Gear Pump/ Internal Gear Pump has compact, close-coupled options for motor speed operation or with gear motors.