I think you are looking for should be GMP for pharmaceutical water purification equipment requirements. Its requirements are probably the following
1, simple structural design, reliable, easy to disassemble.
2, the design of standardization, generalization, systematic parts.
3, the equipment inside and outside the wall surface is smooth and flat, no dead ends, easy to clean and sterilize. The surface of the parts do chrome plating and other surface treatment to resist corrosion and prevent rust. Avoid using paint on the outside of the equipment to prevent peeling.
4, the preparation of purified water equipment using low-carbon stainless steel or other verified not to contaminate the water quality of the material. Equipment for purified water should be cleaned regularly.
5, water for injection contact with the material must be high-quality low-carbon stainless steel (such as 316L stainless steel) or other verified non-contamination of water quality materials. Equipment for the preparation of water for injection should be cleaned regularly and the cleaning effect verified.
6, purified water storage cycle should not be greater than 24 hours, its tanks should be made of stainless steel or verified non-toxic, corrosion-resistant, will not leach out of the contaminating ions of other materials. Protection of its air vent should be installed without shedding fibers of hydrophobic sterilization filter. The inner wall of the tank should be smooth, and the receiver and welds should not have dead ends and trachoma. Sensors showing liquid level, temperature pressure and other parameters that do not form water pollution should be used. The tank should be regularly cleaned, disinfected and sterilized, and the cleaning and sterilization effect verification.