反渗透纯化水预处理设备的要求：1、结构设计应简洁、可靠、拆装便捷。2、为确保拆装和维护的便利性，执行机构应采用标准化、高度通用化的零部件。3、设备内部外部表面需光滑且易于清洗，以防止污垢积累。零件表面需进行镀铬等表面处理以提高耐腐蚀性能，并防止生锈。4、制备纯化水设备应使用低碳不锈钢或其他已验证无污染性的材料。此外，定期清洗并对清洗效果进行验证是必不可少的措施。5 Pure water storage cycle should not exceed 24 hours, and the storage tank should be made of corrosion-resistant materials such as stainless steel. The vent opening should be equipped with a filter that prevents fibers from coming loose.6, The inner wall of the tank should be smooth, and there should be no dead corners or blind spots in the pipelines and welds. Sensors that will not form stagnant water pollution are used to monitor liquid surface temperature, pressure, etc.

Reverse osmosis pure water pre-treatment equipment transportation: 1) Pure water pumps for use in reverse osmosis systems must be easily disassembled for cleaning.2) A closed-loop system is recommended for transporting pure water to minimize contamination risk. Pipelines and fittings must also meet high standards of purity to prevent cross-contamination. Valves used in this process must also meet strict hygiene requirements to ensure safe operation.

In addition to these guidelines, regular cleaning and verification of all components involved in transporting pure water is crucial to maintaining its quality throughout the entire process.

The following categories are commonly found in pharmaceutical applications:

Drinking Water (Potable Water): This type of water comes from municipal supplies or wells and meets national standards for drinking water quality.

Purified Water: This type of water has been purified using methods such as distillation, ion exchange, reverse osmosis or other appropriate techniques.

Injection Water (Water For Injection): This type of purified water has undergone additional steps including distillation followed by filtration through a membrane filter before being sterilized.

Water Quality Standards:

Drinking Water: Must comply with GB5749-85 "Drinking Water Hygiene Standard".

Purified Water: Must comply with current edition "Pharmacopoeia" standard.

Injection Water: Must comply with current edition "Pharmacopoeia" standard.

Electrical resistivity measurements are often used online during pharmaceutical manufacturing processes as an indicator of impurities present in purified waters. In general terms electrical resistivity measures how well an electric field can pass through a substance; higher values indicate lower concentrations of ions which suggests purer substances

Note that both purified and injection-grade waters have specific resistance requirements according to different pharmacopeias like USP-NF(United States Pharmacopeia National Formulary), EP(European Pharmacopeia), JP(Japanese Pharmacopeia) etc., but we've provided only one example here - China's pharmacopeia standard