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RAINY


RAINWATER HARVESTING FILTERS

Roof Gallery

'RAINY' First of its kind Dual Intensity Rainwater Harvesting Filters with self cleaning and auto flush out arrangements. ‘RAINY’R Dual Intensity Rainwater Harvesting Filter™ is the result of over 10 years Continuous R&D done by the team of FARMLAND RAINWATER HARVESTING SYSTEM, by studying the pattern of rain fall in rural and urban India, intensity of rainfall, type of houses, pipeline used for rainwater outlets, re utilization, recharging of ground water and Tube well etc. In the past decade we have witnessed phenomenal changes in global weather patterns. The unpredictable and erratic weather patterns have resulted in torrential down pours and rainfalls of very high intensity. These heavy duty Dual Intensity Rainwater Harvesting filters are so designed; keeping in mind the capture of rainfall loads varying from 5mm to 75mm/hour without affecting the efficiency of filter and the operating required less than 0.06 kg/cm2 (2 feet) so the filter can perform even in low Roof areas. The design, stability and filter function efficiency is directly proportional to the intensity of rainfall. Different models of filters were set in place to capture rainwater from varied rooftops. This brought in affordability, to all cross sections of households and Industry.


Exploded view of Rainy FL Series RWH Filter

Methodology:

The water which enters the filter inlet moves in anticlockwise direction at the periphery of the upper housing. As the water rotates in an anticlockwise direction, the ribs break the momentum of water which results in so called desired flow that enables the passage of water through the vertically placed filter element located in the lower housing. At this juncture the air on the outer wall of the screen mesh is released, creating an attraction between the water molecules on the inner and outer wall of the screen. This affinity between the water molecules results in the setting up of a Cohesive Force. Once the cohesive force is created the water flows rapidly and discharges through the clean water outlet. However when the intensity of rainfall is high, the increased volume of water moves in circular motion impacting the deflector and creates a resultant force, leading to the movement of water at high velocity inside the walls of the housing assembly. This creates a centrifugal force. In both situations, involving low and high intensity of rainfall , the working principle of the filter based on cohesive and centrifugal force respectively, aids the filter element to divert the clean water into the cistern and simultaneously flushes out automatically sand, debris, and dirt particles through drain outlet.



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