Foreword
This standard was proposed and drafted by Chengdu Superior Technology Co., Ltd.
The main drafters of this standard: Li Yongjun, Li Tao.
This standard was first approved for publication in September 2019.
Ultrapure Water System
1 Scope
This standard specifies the classification and marking, requirements, test methods, inspection rules and signs, packaging, transportation and storage of ultrapure water machines.
This standard applies to ultra-pure water machines using raw water that meets the sanitary standards for domestic drinking water as raw water, using membrane filtration, ion exchange and other technologies to produce ultra-pure water with a water output of less than 500 liters per hour.
2 Normative references
The clauses in the following documents have become the clauses of this standard after being referenced. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, all parties who have reached an agreement in accordance with this standard are encouraged to study and use the latest versions of these documents. For undated references, the latest version applies to this standard.
GB / T l91 Packing, storage and transportation icon
GB / T 1019 General rules for packing of household appliances
GB 4706.1 Safety of household and similar electrical appliances, general requirements
GB / T 4789.2 Microbiological examination of food hygiene
GB / T 4789.3 Microbiological examination of food hygiene
GB / T 4789.4 Microbiological inspection of food hygiene Salmonella inspection
GB / T 4789.5 Microbiological inspection of food hygiene Shigella inspection
GB / T 4789.10 Microbiological examination of food hygiene Inspection of Staphylococcus aureus
GB / T 4789.11 Microbiological examination of food hygiene
GB 5749 Hygienic standard for drinking water
GB / T 5750 Standard Test Method for Drinking Water
GB / T 6682 Analysis laboratory water specifications and test methods
GB 9969.1 Instruction Manual for Industrial Products
GB / T 11446.3 General rules for electronic water test methods
GB / T 11446.4 Test method for electronic grade water resistivity
GB / T 11446.5 Atomic absorption spectrophotometric test method for trace metals in electronic grade water
GB / T 11446.6 Spectrophotometric test method for silicon dioxide in electronic grade water
GB / T 11446.7 Ion chromatography test method for trace chloride, nitrate, phosphate, and sulfate ions in electronic grade water
GB / T 11446.8 Test method for total organic carbon in electronic grade water
GB / T 11446.9 Instrumental test method for particles in electronic grade water
GB / T 11446.10 Filter culture test method for total bacteria in electronic grade water
CJ / T 168-2002 pure water machine
3 Terms and definitions
The terms and definitions established in CJ / T 168-2002 are applicable to this standard.
4 Classification and marking
4.1 Classification
4.1.1 According to the shape, it is divided into two categories: desktop (TI) and floor-standing (TLI).
4.1.2 The classification of each model and model according to the effluent quality is shown in Table 1.
Table 1 Water Quality And Model
Quality of outlet water | Model number |
Resistivity<10MΩ·cm | YY-TI-0 |
Resistivity 10～16 MΩ·cm | YY-TI（TLI）-I |
Resistivity17～18.2 MΩ·cm | YY-TI（TLI）II- |
Resistivity18.2 MΩ·cm，total number of bacteria<0.01cfu/ml | YY-TI（TLI）-III- |
Resistivity18.2 MΩ·cm，TOC≤5µg/L | YY-TI（TLI）-Ⅳ- |
4.2 Ultrapure water machine model mark
YY
Brand Code
TI
Shape category
II
Water quality category
L
Water production, L; expressed in Arabic numerals
W
0-raw water code: S-drinking water, W-distilled water
Example: YY-TI-20L (W) represents a desktop ultrapure water machine where the raw water is distilled water, the water production capacity is 20 liters / hour, and the water resistivity is 17 to 18.2 MΩ · cm.
5 Requirements
5.1 Operating environmental conditions
5.1.1 The quality of raw water should meet the requirements of GB5749.
5.1.2 Ambient temperature : 5℃～40℃
5.1.3 Relative humidity ≤90%。
5.1.4 Atmospheric pressure :0.086Mpa～0.106MPa。
5.1.5 The water pressure range of Liaoyuan water is 0.1 MPa to 0.3 MPa.
5.1.6 Water temperature of raw water is 5℃～40℃。
5.1.7 Operating voltage: single-phase 220V
%
5.2 Outlet water quality index
5.2.1 See Table 2 for sensory indicators
Table 2 Sensory indicators
Item | Indicator |
Chroma | <5 degrees, does not show other abnormal colors |
Turbidity | <1 degree |
Smell and smell | No odor and odor |
Visible to the naked eye | Not checked out |
5.2.2 Physical and chemical indicators are shown in Table 3
Table 3 Physical and chemical indicators
ndicator | YY-TI-0 | YY-TI（TLI）-I | YY-TI（TLI）-II | YY-YY-TI（TLI）-III | YY-YY-TI（TLI）-Ⅳ |
Conductivity (25 ℃), µs / cm | ≤0.1 | ≤0.1 | ≤0.055 | ≤0.055 | ≤0.055 |
Absorbance (254nm, 1cm optical path) | ≤0.001 | ≤0.001 | ≤0.0005 | ≤0.0005 | ≤0.0005 |
Soluble silicon (calculated as SiO2) (mg / L) | ≤0.01 | ≤0.01 | ≤0.005 | ≤0.005 | ≤0.005 |
Oxygen consumption / (mg / L) | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
Lead (in pb) | ≤0. 1 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 |
Arsenic (as As) (mg / L) | ≤0.1 | ≤0.01 | ≤0.05 | ≤0.02 | ≤0.02 |
Carbon tetrachloride (mg / L) | ≤1 | ≤0.1 | ≤0.05 | ≤0.001 | ≤0.001 |
Copper (as Cu) (mg / L) | ≤0.2 | ≤0.05 | ≤0.005 | ≤0.002 | ≤0.002 |
Free chlorine (as Cl) (mg / L) | ≤1 | ≤0.1 | ≤0.01 | ≤0.005 | ≤0.005 |
Nitrite (as NO2) (mg / L) | ≤1 | ≤0.5 | ≤0.01 | ≤0.002 | ≤0.002 |
Potassium (in k) (mg / L) | ≤0.5 | <0.1 | ≤0.05 | ≤0.002 | ≤0.002 |
Sodium (as Na) (mg / L) | ≤0.5 | <0.1 | ≤0.005 | ≤0.01 | ≤0.001 |
Silicon (as Si) (mg / L) | ≤1 | ≤0.1 | ≤0.05 | ≤0.02 | ≤0.2 |
Iron (as Fe) (mg / L) | ≤0.1 | ≤0.01 | ≤0.005 | ≤0.005 | ≤0.002 |
Zinc (as Zn) (mg / L) | ≤0.2 | ≤0.01 | ≤0.005 | ≤0.002 | ≤0.002 |
Calcium (calculated as Ca) (mg / L) | ≤0.01 | ≤0.001 | ≤0.005 | ≤0.002 | ≤0.002 |
Magnesium (as Mg) (mg / L) | ≤0.01 | ≤0.005 | ≤0.005 | ≤0.001 | ≤0.001 |
5.2.3 See Table 4 for microbial indicators
Table 4 Microbiological indicators
Indicator | YY-TI-0 | YY-TI（TLI）-I | YY-TI（TLI）-II | YY-TI（TLI）-III | YY-TI（TLI）-IV |
Total bacteria / (cfu / mL) | <10 | <0.1 | <0.01 | <0.01 | <0.01 |
Coliform MPN / 100Ml) | <3 | <0.05 | <0.05 | <0.05 | <0.05 |
Pathogenic bacteria (refers to intestinal pathogenic bacteria and pathogenic cocci) | Not checked out | ||||
5.3 Water production
The water output of the ultrapure water machine should be greater than or equal to the rated value.
5.4 appearance
5.4.1 The surface coating of the parts should be uniform, smooth, flat, and inconsistent in color. There should be no stickiness, brittleness, peeling, air bubbles, adhered particles, obvious flow marks and scratches.
5.4.2 Welding needs to be smooth and smooth without obvious defects
5.4.3 Housing material properties should meet national or industry standards
5.5 Sanitary Standards
All materials and parts in contact with water must meet the requirements of national safety and health standards
5.6 Concentrated water discharge
After the ultra-pure water machine treatment, all the concentrated water should be automatically discharged from the drainage pipe
5.7 Sealing performance
Ultra-pure water machine has good sealing performance, and there must not be any leakage at the joints of all parts, pipelines and valves
5.8 Noise
When the ultra pure water machine is running under load, the noise must not exceed 50 dB
5.9 Control function
The control system must be sensitive and reliable to start and stop. The storage tank is full of water, the booster pump should automatically stop, and the concentrated water should stop draining within 5 minutes after the shutdown; the water source is cut off or the water pressure is too low, the booster pump should not start or automatically stop during operation
5.10 Electrical Safety
Electrical safety requirements should meet the requirements of GB4706.1
6 Test method
6.1 Water quality
Tested in accordance with GB / T 4789.2 ～ 5, GB / T 4789.10 ～ 11, GB / T5750, GB / T 6682, GB / T 11446.3 ～ 10
6.2 Water production
Start ultrapure water machine and measure with stopwatch and graduated cylinder
6.3 Appearance
Appearance inspection adopts visual inspection method, and its appearance, structure, coating, joints, etc. shall meet the requirements of 5.4
6.4 Hygiene standards
All materials and parts in contact with water must meet the requirements of national safety and health standards. The supplier shall issue a certificate of conformity after inspection according to the relevant standards.
6.5 Concentrated water discharge
Visual inspection
6.6 Sealing performance
Start the ultra-pure water machine to fill water and maintain the working state for 30 minutes. Check the body, pipelines, valves and their connections for abnormal changes and leaks, which should meet the requirements of 5.7
6.7 Noise test
Ultra pure water machine noise measurement can be measured in the general environment, the environmental noise must not be higher than 50dB, when the machine is in the working state, at the 1/2 height of the body, the noise measurement is divided into four points: front, back, left and right. The average value of readings at each point should be ≤50dB
6.8 Control Function
6.8.1 After turning on the ultrapure water machine for 10 minutes, close the ball valve on the water storage tank. At this time, the pressure in the pipeline gradually increases. The high-pressure switch should automatically stop the high-pressure pump. Open the ball valve and the booster pump should start immediately; Check the status of the pump. It should be started or stopped automatically every time.
6.8.2 In the running state of the ultrapure water machine, close the ball valve on the raw water pipeline, the booster pump should stop running, open the ball valve, the booster pump should start immediately, and then repeat the action three times, and it should automatically start or stop each time.
6.8.3 When the ultrapure water machine is running, close the water inlet valve of the water storage tank. The four-sided valve should stop discharging concentrated water within 5 minutes.
6.8.4 When the ultrapure water machine is running, open and close the solenoid valve 10 times, check whether the solenoid valve is sensitive and reliable.
6.9 Electrical Safety
Under the running state of ultrapure water machine, it should be carried out according to the provisions of GB4706.1
7 Inspection rules
Inspection is divided into factory inspection and type inspection
7.1 Factory inspection
7.1.1 Before each ultrapure water machine leaves the factory, it must be inspected before leaving the factory.
7.1.2 The factory inspection items of each ultrapure water machine are the requirements specified in 5.3, 5.4, 5.6, 5.7, and 5.9 of this standard.
7.1.3 There was an unqualified item in the ultra-pure water machine inspection before leaving the factory, and it was submitted for inspection after rework. If it still fails, the product is a failed product.
7.2 Type test
7.2.1 The items of type inspection are all the requirements specified in this standard
7.2.2 Type inspection should be performed in one of the following cases:
a) Stereotype identification of new products before production;
b) After the production is officially put into operation, if there is a major change in the design, process or raw materials of the product that may affect the performance of the product;
c) When the product is suspended for more than half a year and resumed production;
d) When the factory inspection results are significantly different from the last formal inspection results;
e) regular inspection every one year;
f) When the national quality supervision and inspection department proposes the type inspection requirements.
7.2.3 One sample for type inspection shall be randomly selected from the products that passed the factory inspection.
7.2.4 If there are any unqualified items during the inspection, the sampling shall be doubled to re-check the unqualified items. If the retest result is qualified, the product is judged to be qualified. If the retest result is still unsatisfactory, the product is judged to be unqualified.
8 Packaging, marking, transportation and storage
8.1 Packing
8.1.1 The ultra-pure water machine is packed in a carton / wooden box. The interior should be reasonably arranged, the pads should be solid, and it must not be moved.
8.1.2 Documentaries with machine
The documents in the box include: product certification, parts list, and product instruction manual. The writing of the product instruction manual should meet the requirements of GB / T 9969.1.
8.2 Marking
8.2.1 The mark on the outer packaging of the ultrapure water machine should indicate: product name, product standard number, trademark, quality, batch number, manufacturer name, address, telephone, and graphics such as upward, rainproof, and fragile according to GB / T191。
8.2.2 The nameplate of the ultra-pure water machine should indicate: product name, model, trademark, working voltage, power, water production, production date, and factory name.
8.3 Transportation
The ultrapure water machine should be handled lightly during transportation. It is strictly forbidden to collide or fall. Pay attention to rain, moisture and frost during transportation.
8.4 Storage
Ultrapure water machine should be stored in a ventilated and dry place at 5 ℃ ～ 40 ℃, and should not be exposed to sunlight, rain and corrosion.