1. What is UL certification?
UL is an abbreviation for Underwriter Laboratories Inc. UL Safety Laboratory is the most authoritative private organization in the United States and the largest in the world engaged in safety testing and identification. UL certification is an important endorsement that the safety, quality and reliability of fire pumps meet international standards.
Second, the domestic UL certification of fire pump manufacturers.
At present, most domestic fire pump manufacturers mainly focus on the production of fire pumps that meet the Chinese CCCF standard. There are only a few fire pump manufacturers that have obtained UL certification, such as Kailite Pump. With its high-quality fire pump products, Kailite Pump Industry has not only won the recognition of the domestic market, but also emerged on the international stage. Kailite Pump's fire pump has successfully passed the China CCCF fire protection product certification and international UL and FM certification, demonstrating its excellent technical strength and product quality. As a result, Kailite Pump Industry has become one of the few manufacturers with complete fire protection qualifications in the domestic fire pump industry.
UL certification and FM certification fire pump is often one of the necessary conditions to undertake foreign engineering projects, if the fire pump has UL and FM certification seals, it means that the fire pump manufacturer has passed the most stringent requirements, can rest assured that their fire pump. It also states that each fire pump must be tested and meet the following requirements before shipment:
1. There is a rated working point, which includes the rated flow gpm and the rated pressure PSI
2. The fire pump must be able to meet the rated working point flow rate of 150%, while maintaining at least 65% of the rated working point pressure.
3. The shut-off dead center or agitation pressure (pressure when there is no flow) shall not exceed 140% of the rated working point pressure.
4. The drive of the fire pump, whether it is an electric motor, a diesel engine or a steam turbine, must meet the full power requirements of the fire pump, even if it means that the flow rate exceeds 150% of the required operating point. For example, at 100 psi pressure, the flow rate is 1,000 gpm. A flow rate of 1,500 gpm is required while maintaining a minimum pressure of at least 65 psi. At 0 rpm, the 140% dead-center pressure must be less than 140 psi. The pump curve (see Figure 1) shows a constant rise in head-flow from the rated point to the dead-dead center. The power curve shows that at 1,600 gpm, the brake horsepower (bhp) peaks at 86 hp, indicating that the pump power peaks at 160% of the rated point flow, requiring a 75 hp electric motor (many UL fire pump motors allow 1.).15 is used, so in this case, a 75 horsepower motor provides 8625 bhp）。
The recent fire hydrant failure incident in Guiyang, Guizhou Province also once again reminds us that we must choose a fire pump with high quality and high stability, pay attention to the daily maintenance of fire-fighting equipment, and fire safety is more important than Mount Tai.