General Type GSX series product is characterized by broad comprehensive performance curve,sound hydraulic performance, novel structure,high efficiency,high reliability,low net positive suction head ,and low maintenance. The design,manufacture,and quality of this series product meet the standard of GB/T5656"Technical conditions for centrifugal pumps-Class II"and its efficiency indexes meet the standard of GB/T19762"The minimum allowable values of energy efficiency and evaluating values of energy conservation of centrifugal pump for fresh water" Application GSX series products are mainly used for transport fresh water or other liquid with similar physicochemical properties to fresh water,it can also be widely applied in water supply and drainage system or circulation cooling water system for steel,petrochemical,thermal power generation,mining,and other working conditions Performance Parameters Table Model Capacity(m&sup3;/h) Head(m) Pump efficiency (%) Shaft power (kW) Speed(rpm) Impeller outer diameter(mm) Inlet diameter(mm) Outlet diameter(mm) GSX250-770 882 226 76 715 1480 770 DN300 DN250 1260 216 83 894 1512 205 83 1018 Product Attribute Attribute Attributes Attribute value Material Impeller ZG07Cr19Ni10 Pump shaft 40Cr Machinery Seal Import/Domestic Pump cover (body) HT250 Housing seal ring Q235-B/ZG230-450 Impeller sealing ring (optional) ZG07Cr19Ni10 Bearing Import/Domestic Working conditions Medium temperature (&ordm;C) <80&ordm;C Maximum ambient temperature (&ordm;C) 40&ordm;C Installation Inlet diameter (mm) DN300 Outlet diameter (mm) DN250 Direction of rotation Clockwise from the motor to the pump Entrance orientation level in Exit orientation level out Base form / Motor Number of motor phases 3 Motor power safety factor 1.2 Protection class IP54 Insulation class F Motor power (kW) 900 Motor model YX450-4 Power frequency (Hz) 50 Rated voltage (V) 6000 Energy efficiency rating 2 Package Pump weight (kg) 1700 Motor weight (kg) 3780 Structural feature 1.Sealing Superior mechanical seal,long term operation without leakage Mechanical seal,strong interchangeability for universal use by non-asbestos soft packing structure and injection type packing structure Stainless steel shaft sleeve for easy maintenance Half packing gland,large space for packing replacement 2.Protective cover Half-split structure,comply with IE standard,safe and reliable 3.Casing Circular pressure chamber design with high efficiency Double-volute pumping chamber is with balanced radial force and sound strength; bearing and seal are with small force withstanding and long service life Water suction chamber is with split rib design;inlet is without vortex and noise while with stable operation and sound cavitation performance The inlet and outlet water channels are coated with smooth wear-resistant coating,and water loss is small Auto-correct pump cover for easy installation Inlet DN&le;500 for universal use by vertical and horizontal types 4.Bearing Short span and enlarged diameter design, stable operation and long service life. Grease lubrication with small and medium pump,online refueling Provided with online vibration and temperature measuring devices to ensure safety operation Transfer high temperature liquid,employ water-cooling structure 5.Shaft Bold design,universal use for 50HZ and 60HZ pump shaft,sound rigidity, and stable operation Full sealing design, no contact with liquid, and easy maintenance Allow short-time inversion, common shaft for forward and reverse rotations 6.Impeller Three-dimensional flow theory design employed,CFD calculation simulation,high efficiency, high efficiency zone width, and sound