Ultrapure water equipment is a water treatment equipment that uses pretreatment, reverse osmosis technology,
ultrapure purification and post-treatment methods to remove almost all conductive medium in water and remove
the non-dissociable colloidal substances, gases and organic matter to a very low degree.
Pure water equipment mainly uses reverse osmosis membrane technology. Its working principle is to apply a
certain pressure to the water, so that the water molecules and ionic mineral elements pass through the reverse
osmosis membrane, while most of the inorganic salts (including heavy metals), organic matter and bacteria, viruses,
etc. dissolved in the water cannot pass through the reverse osmosis membrane, thus separating the purified water
that has passed through the membrane from the concentrated water that cannot pass through the membrane strictly.
The pore size of the reverse osmosis membrane is only 0.0001 micron, while the diameter of viruses is generally 0.02-0.4
micron, and the diameter of common bacteria is 0.4-1 micron.
1. Different Uses
(I) Uses of Ultrapure Water Equipment:
1. Production and cleaning of ultrapure materials and ultrapure reagents.
2. Production and cleaning of electronic products.
3. Production of battery products.
4. Production and cleaning of semiconductor products.
5. Production and cleaning of circuit boards.
6. Production of other high-tech fine products.
(II) Uses of Pure Water Equipment:
1. Chemical water treatment in power plants
2. Ultrapure water for electronics, semiconductors, and precision machinery industries
3. Preparation of food, beverages, and drinking water
4. Small pure water station, group drinking pure water
5. Fine chemical industry, high-end discipline water
6. High-purity water preparation for other industries
7. Pharmaceutical industrial process water
8. Desalination of seawater and brackish water
2. Different electrical conductivity of water
①. Outlet water quality of ultrapure water: resistance rate > 15MΩ.cm
Ultrapure water quality is divided into five industrial standards, respectively 18MΩ.cm, 15MΩ.cm, 10MΩ.cm, 2MΩ.cm,
0.5MΩ.cm, to distinguish different water quality.
②. Pure water is divided into: industrial pure water and drinking pure water
Industrial pure water: at 25℃ 1. Ordinary pure water: EC=1~10us/cm; 2. High purity water: EC=0.1~1.0us/cm; 3. Ultra-pure
water: EC=0.1~0.055; Drinking pure water: EC=1~10 us/cm (national standard).
3. The adopted processes vary between the various equipment
(I). Ultra-pure Water Equipment Process Flow:
1、Pretreatment system → reverse osmosis system → intermediate water tank → coarse mixing bed → fine mixing bed →
pure water tank → pure water pump → ultraviolet sterilizer → polished mixing bed → precision filter → water object
(≥18MΩ.CM) (traditional process).
2、Pretreatment → Reverse osmosis → intermediate tank → Water pump →EDI device → Purified tank → pure water pump
→ UV sterilizer → Polished mixing bed →0.2 or 0.5μm precision filter → water object (≥18MΩ.CM) (latest technology).
3、Pretreatment → Primary Reverse Osmosis → Chemical Dosing System (PH Adjustment) → Intermediate Water Tank →
Secondary Reverse Osmosis (RO Membrane with Positive Charge) → Pure Water Tank → Pure Water Pump → EDI Device →
Ultraviolet Sterilizer → 0.2 or 0.5μm Precision Filter → Water Consumption Object (≥17 MΩ.CM) (Latest Technology).
4、Pretreatment → Reverse Osmosis → Intermediate Water Tank → Water Pump → EDI Device → Pure Water Tank →
Pure Water Pump → Ultraviolet Sterilizer → 0.2 or 0.5μm Precision Filter → Water Consumption Object (≥15 MΩ.CM)
(Latest Technology).
5、Pretreatment System → Reverse Osmosis System → Intermediate Water Tank → Pure Water Pump → Coarse Mixed Bed
→ Fine Mixed Bed → Ultraviolet Sterilizer → Precision Filter → Water Consumption Object (≥15 MΩ.CM) (Traditional Technology).
(II) Purified Water Equipment Process Flow:
1. Ion Exchange Method
Raw Water → Raw Water Pressure Pump → Multi-Media Filter → Activated Carbon Filter → Water Softener → Precision Filter →
Cation Resin Filter Bed → Anion Resin Filter Bed → Mixed Bed of Cation and Anion Resin →Microporous Filter → Water Consumption
Point
2. Two-Stage Reverse Osmosis Method
Raw Water → Raw Water Pressure Pump → Multi-Media Filter → Activated Carbon Filter → Water Softener → Precision Filter →
Primary Reverse Osmosis → PH Adjustment → Intermediate Water Tank → Secondary Reverse Osmosis (RO Membrane Surface with
Positive Charge) → Purified Water Tank → Purified Water Pump →Microporous Filter → Water Consumption Point
3. Use EDI method
Raw Water → Raw Water booster pump → Multi-media filter → Activated carbon filter → Water Softener → Precision filter →
Primary reverse osmosis machine → Intermediate water tank → Intermediate water pump → EDI system →Microporous filter →Water
Consumption Point
