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Dia-Flo Diaphragm Valves
Dia-Flo diaphragm valves have been proven the most reliable design for demineralizers for more than fifty years. The demineralizer process purifies water by the Ion Exchange method, reducing the amount of ions in the salt solution. Ions naturally occur in water in the form of dissolved mineral salts. Condensate polishing is an ion exchange method used to remove trace contaminants, both dissolved and suspended from high purity water.
The plastic lined weir body diaphragm valve is the valve of choice because of its clean and versatile design, and ease of operation.
Tefzel® lining is typically used in the regeneration of cation resins, which involves the handling of hydrochloric acid or sulfuric acid.
Polypropylene lining is used in caustic solution and the balance of the piping system.
Diaphragm valves are automated with either doubleacting or spring-opposed pneumatic diaphragm type actuators. The actuators are generally specified with adjustable opening stop (rate-set) and open/closed limit switches for remote position indications. Two types of external corrosion protection are available: White epoxy and PVDF coating. These coatings are applied to exterior and interior surfaces of the valve before assembly.
Tefzel® is a registered trademark of Dupont.
View the Dia-Flo Selection Guide