Grated Manhole

Features and Operating Principle

The manual Grit Chamber Manhole is constructed using a reinforced concrete manhole with an AISI 304 stainless steel screen installed inside to ensure high corrosion resistance and long life even in aggressive environments.
The dimensions of the screen and the mesh size can vary according to specific needs, for example, 40 mm pitch as standard or other combinations, in order to optimize water passage and solid retention.
The operation is simple and entirely mechanical: water and debris flow through the screen, while coarse solids are retained to be subsequently extracted manually using a comb rake provided with the unit. Consequently, the clean water flows into the drain free of particles with a diameter greater than that of the screening process.
The smooth and non-porous stainless steel surface of the screen facilitates cleaning and prevents the accumulation of residues on it, thus offering a durable solution.
The hydraulic capacity of the manhole and its load resistance vary according to the chosen model.
The removal of solids through the screening of urban and industrial wastewater is a fundamental phase in order to increase the efficiency of purification plants and to protect both the equipment and the quality of subsequent treatments.
These systems intercept and separate coarse materials, plastic, paper, textile fibers, and organic residues, which in turn cause blockages, damage, and premature wear of lifting systems, pumps, and biological systems.
The Grit Chamber Manhole represents the foundation of an efficient treatment system as it promotes the protection of aquatic ecosystems and compliance with relevant environmental regulations.