What Are the Design Requirements for Fire Pumps According to UL/FM?

What Are the Design Requirements for Fire Pumps According to UL/FM?

As it is known, UL 448 is a comprehensive standard that includes double-suction, end-suction or in-line pump design/test processes. UL or FM approval is obtained for some pumps with flow rates. Impellers, wear rings, impeller nuts, casing heat rings or in-pump bolts must be manufactured entirely from corrosion-resistant materials. The pump must have a permanent pump label. The label must also be resistant to corrosion. The drain plug should be located just above the body. The material here must be resistant to corrosion. Pumps must have stuffing box. Roller bearings should have a working capacity of 5000 hours at maximum load.

What are the Performance Requirements According to UL/FM?

The pressure produced by the pumps at a capacity of approximately 150% of the rated flow rate for which they are tested must be more than 65% of the rated pressure. Also, the minimum pump pressure should be 40 psi. Necessary tests are performed over the pump rated motor speeds. Performance curves should be within the expected and appropriate values. The power of the engine itself reveals the peak power of the pumps. For example, end-suction pumps have to have a positive suction head of -4.57 m at &150 rated flow rate on mercury manometers. It is one of the indispensable conditions that many materials, from the wheel to the lantern ring, have an absolute resistance to corrosion. The drain plug should have a size of ½. These drain plugs should be positioned just above the stem.