Purified water refers to high-purity water obtained by removing impurities (including minerals, organic substances, microorganisms, colloids, etc.) from water through specific purification processes. Its purity is higher than that of ordinary tap water and drinking water, and it is widely used in fields with strict water quality requirements such as pharmaceuticals, biopharmaceuticals, electronics, chemical industry, and laboratories.
Purified Water Solutions
Low impurity content
No microbial contamination
Low conductivity
Technology of RO PW Treatment
Modular components of PW water treatment
1. Pre-Treatment
Raw water storage tank optional Pre-heat exchanger Multi-media filter Activated carbon filter Softener Security filter
Purified water tank Pressure booster system Ozone/UV sterilization Temperature control
Purified water has a wide range of applications, mainly concentrated in fields with high requirements for water purity, specifically including:
1. Purified Water Solutions
Pharmaceutical production: Used as production water for pharmaceuticals such as injections and oral preparations, applied in batching, dissolving, washing medicine bottles and equipment, etc., which directly affects the quality and safety of pharmaceuticals.
Medical field: In scenarios such as operating rooms and laboratories, it is used for cleaning and disinfecting instruments, as well as preparing reagents in clinical tests, etc.
Water Requirements (For reference only): Conforms to USP/EP/ChP.
Items
Conductivity
TOC
Microbial Limits
Nitrates
Heavy Metals
Requirements
≤1.3 μS/cm @ 25°C
≤500 ppb (μg/L)
≤100 CFU/mL
≤0.2 ppm
≤0.1 ppm (as Pb)
Conductivity :
≤1.3 μS/cm @ 25°C
TOC :
≤500 ppb (μg/L)
Microbial Limits :
≤100 CFU/mL
Nitrates :
≤0.2 ppm
Heavy Metals :
≤0.1 ppm (as Pb)
2. Electronics Industry
Used in processes like cleaning, photolithography, and electroplating of electronic components (such as chips, semiconductors, circuit boards) to prevent impurities in water from causing performance degradation or damage to the components.
Water Requirements (For reference only): Conforms to ASTM, SEMI, etc.
Items
Resistivity(25°C)
TOC
Microbial Limits
Bacterial endotoxins
PM
Metal Ions(Na⁺, K⁺, Ca²⁺, Al³⁺)
DO
SiO₂
Requirements
≥18.2 MΩ·cm
≤5 ppb
≤1 CFU/mL
<0.03 EU/mL
≥0.05 μm
<1 ppt
≤5 ppb
≤0.5 ppb
Resistivity(25°C) :
≥18.2 MΩ·cm
TOC :
≤5 ppb
Microbial Limits :
≤1 CFU/mL
Bacterial endotoxins :
<0.03 EU/mL
PM :
≥0.05 μm
Metal Ions(Na⁺, K⁺, Ca²⁺, Al³⁺) :
<1 ppt
DO :
≤5 ppb
SiO₂ :
≤0.5 ppb
3. Chemical Industry and Scientific Research
In fine chemical production, it serves as a reaction medium or solvent to ensure the purity and stability of chemical reactions.
In laboratories, it is used for chemical analysis, experimental research, instrument calibration, etc., to guarantee the accuracy of experimental results.
Water Requirements (For reference only):Conforms to ASTM, etc.
Items
Conductivity (25°C)
TOC
Microbial Limits
SiO₂
Na⁺
Cl-
Requirements
1 – 10 µS/cm
< 500 ppb
< 100 CFU/mL
< 500 ppb
≤50μg/L
≤50μg/L
4. Food and Beverage Industry
In the production process of some high-end foods and beverages (such as bottled water, fruit juice, beer), it is used for raw material cleaning, batching, washing of packaging containers, etc., to improve the hygienic quality of products.
Water Requirements (For reference only): Conforms to China National Standard GB 17323, and so on.
Items
Appearance
Conductivity
PH
Coliforms
P. aeruginosa
Heavy Metals
Requirements
Colorless, odorless, and free from foreign matter
≤ 10 μS/cm
5.0-7.0
ND
ND
≤ 0.01 mg/L
5. Cosmetics and Daily Chemical Industry
In the production of high-purity cosmetics and skin care products, it is used as raw material water to reduce the impact of impurities on product stability and irritation.
Water Requirements (For reference only):Conforms to USP, EP,etc.
Items
Conductivity (25°C)
Resistivity (25°C)
TOC
TVC
Nitrates
Heavy Metals (as Pb)
Requirements
≤ 1.3 μS/cm
≥ 1.0 MΩ·cm
≤ 0.50 mg/L
≤ 100 CFU/mL
≤ 0.2 mg/L
≤ 0.1 mg/L
6. Power Industry
It is used for boiler feed water treatment to prevent boiler scaling and corrosion, and to improve boiler thermal efficiency and operational safety.