AuThor：Jules Hsu 26 Feb. 2025 Catalog: Applications
(1) The components of the purified water system, including but not limited to pipes, valves, fittings, seals, diaphragms and instruments, should be appropriate and meet the full operating temperature range and potential chemical risk control that may be encountered during static/dynamic and disinfection. The structure should be of appropriate quality. The construction materials of the purified water system should be appropriate, and the flow-through parts should not be leached, adsorbed, absorbed, and corrosion-resistant. Stainless steel grades 304 or 316L are generally recommended. The selection of materials should take into account the disinfection method.
(2) Flanges, connectors and valves of purified water equipment should be of sanitary design. Valves should be forged diaphragm valves or machined valve bodies. Sampling valves suitable for purified water systems should be sanitary valves with a surface roughness not exceeding 1.0μm.
(3) The installation of the purified water system should improve the drainage capacity and install the system in a way that allows complete drainage. The pretreatment system and desalination system should meet the water production requirements of the system, and the process configuration should be reasonable and appropriate.
(4) Purified water storage and distribution systems should be controlled to reduce the risk of contamination and rapid microbial growth. Control measures may include the appropriate use of chemical disinfection or thermal disinfection procedures. Maintain continuous circulation of water, maintain turbulence, and ensure sanitary design, including the use of zero-dead-leg diaphragm valves to minimize dead legs. Areas where dead legs may exist should be measured and calculated.
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