The 1600 Series has a maximum operating pressure of 175 psi, and a maximum operating temperature of 300 F. Replaceable "cooler running" bearing cartridge extends bearing life, and with permanently sealed greased lubricated ball bearings it is virtually maintenance free. Pressure tappings allow for differential pressure readings to be taken across the pump. Dynamically balanced stainless steel impeller assures long life and higher pump efficiencies. Non corrosive shaft sleeve protects the shaft by preventing contact between the shaft and system fluid eliminating the need for more expensive corrosion resistant shaft materials. 1600 Series In-Line pumps utilize a Type 21 seal design which facilitates quick and easy replacement. One size seal fits all models. Flexible coupler absorbs shock, vibration and misalignment that could be transmitted to the cartridge and motor bearings while also isolating and preventing any motor related noise or vibrations from being transmitted to the system. Resilient mounted motor insures quiet reliable vibration free operation of the pump. Superior parts flexibility: one cartridge, one seal, and two motor frames fit all pump models. All 1600 series pumps are factory tested, and are built in accordance with Hydraulic Institute Standards.