Casing must be designed in such a way that can stand the test voltages (Hydrostatically Test) Not less than 2, 68 k Paschal II (300 pounds per square inch) or not less than 1.5 times its Maximum Working pressure Pressure using numbers rather than the criteria. Joint flange (Flange Connections) either to the suction and delivery side will have to endure the same supply voltage, such as a pump-house-Casing made of cast iron (Cast-Iron)
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