This standard specifies the requirements for displacement-type chlorinators designed to feed a solution of bleaching powder for water disinfection. It covers the materials, construction, performance criteria, and testing methods for these feeders, which are typically used in smaller water supply systems.
Requirements for chlorination equipment, Part 2: Vacuum feed type chlorinators
Quick Reference Values
Maximum recommended solution strength2% available chlorine
Minimum thickness of FRP tank shell3 mm
Required dosing accuracy±5% of the set rate
Hydrostatic test pressure1.5 times the maximum working pressure
Practical Notes
Ensure all wetted parts are made of specified corrosion-resistant materials (FRP, PVC, HDPE) to prevent rapid degradation from the chlorine solution.
These feeders are prone to clogging from insoluble matter in bleaching powder; regular cleaning and use of a settling tank is crucial for reliable operation.
Ideal for rural or small-scale water schemes where simplicity and low capital cost are more important than high dosing precision.