The core role of rubber check valve (represented by duckbill valve) is to achieve one-way fluid control through the elastic sealing structure, the specific function is reflected in the following scenarios:
- First, anti-reverse flow control
Anti-flooding backflow: in the rainy season or flooding, to stop the city river flood water through the sewer backflow to the street, to avoid the basement, underground facilities are flooded
Sewage anti-reverse flow: automatic closure in the drainage network to prevent secondary pollution caused by reverse flow of sewage or odourous liquids from sewage treatment plants, pumping stations and other places
Fluid sealing: the use of elastic rubber closure characteristics, effectively blocking the reverse leakage of sewage, chemical media or toxic gases
- Second, drainage system optimisation
Full aperture drainage: the valve opening is fully open when positive drainage, allowing sewage containing solid particles (such as silt, gravel) to pass through smoothly, avoiding the traditional metal valve jamming problem.
Low resistance and high efficiency: the flow resistance coefficient is close to the straight pipe section, which reduces the energy consumption of the pumping station and improves the drainage efficiency (the minimum positive opening pressure is only 5cm water column).
- Third, industrial and municipal applications
Chemical anti-corrosion: neoprene, ethylene propylene rubber and other materials can withstand acid and alkali media, suitable for chemical pipeline delivery system
Agricultural irrigation: in the irrigation system to prevent backflow of irrigation water, to ensure a steady supply of water in one direction.
Coastal protection: installed in the dock outlet, to prevent the backflow of seawater during high tide erosion of infrastructure.
- Operation and maintenance characteristics
Zero energy consumption self-control: rely on fluid pressure to achieve automatic opening and closing, without the need for electricity or human intervention.
Maintenance-free design: all rubber structure without mechanical parts, aging resistance and self-cleaning function, life expectancy of more than 10 years.
Compared with the traditional slapper, its flexible closing characteristic solves the problems of poor closure and easy corrosion, making it the preferred solution for urban flood control and industrial sewage treatment.