QB/T 4695-2014 English PDF (QBT4695-2014)

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QB/T 4695-2014: Household and similar Pre-filter
QB/T 4695-2014
QB
LIGHT INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 97.180
Classification number. Y 69
Registration number. 46736-2014
Household and similar pre-filter
ISSUED ON. JULY 09, 2014
IMPLEMENTED ON. NOVEMBER 01, 2014
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Product classification and model designation ... 6 
5 Requirements ... 7 
6 Test methods ... 9 
7 Inspection rules ... 15 
8 Marking, packaging, transportation and storage ... 17 
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Light Industry Association.
This standard shall be under the jurisdiction of the National Standardization
Technical Committee of Household Appliances (SAC/TC 46).
The main drafting organizations of this standard. Shenzhen Chengde Industrial
Co., Ltd., Zhejiang Qinyuan Water Treatment Technology Co., Ltd., Shanghai
Haoze Water Technology Development Co., Ltd., Hangzhou Shuixiang
Environmental Technology Co., Ltd., Shenzhen Jialeshi Water Technology Co.,
Ltd, Zhuhai Gree Electric Appliance Inc., 3M (China) Co., Ltd., Dongli
Technology (Shanghai) Co., Ltd., China Household Electrical Appliances
Research Institute, Wuxi Water Purification Industry Associations.
The main drafters of this standard. Ouyang Kuihui, Bian Wenbing, Peng Kaiqin,
Shi Aijun, Zhang Wenrong, Liu Xiaoping, Yang Yong, Lei Yonggang, Huang Li,
Deng Zhe, Gu Jiuchuan.
Household and similar pre-filter
1 Scope
This standard specifies the terms and definitions, product classifications and
model designations, requirements, test methods, inspection rules, marking,
packaging, transport and storage of household and similar filtration equipment
for the removal of particulate matter in tap water.
This standard applies to the pre-filter which uses the municipal tap water or
other centralized supplied water as raw water AND the filter or lamination as
the main filtration means, used for household and similar applications.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB/T 191-2008 Packaging – Pictorial marking for handling of goods (ISO
780.1997, MOD)
GB/T 1019 General requirements for the package of household and similar
electrical appliances
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1.
Sampling scheme indexed by acceptance quality limit (AQL) for lot-by-lot
inspection (GB/T 2828.1-2012, ISO 2859-1.1999, IDT)
GB/T 2829 Sampling procedures and tables for periodic inspection by
attributes (Apply to inspection of stability for productive process)
GB/T 4706.1 Safety of household and similar electrical appliances - Part 1.
General requirements (GB 4706.1-2005, IEC 60335-1.2001, IDT)
GB 5749 Sanitary standard for drinking water
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray test (GB/T
10125-2012, ISO 9227.2006, IDT)
GB/T 17219 Standard for safety evaluation of equipment and protective
materials
It refers to the efficiency of the pre-filter to be able to retain the particles of
the nominal pore size of the manufacturer.
Note. Unit is %.
3.6
Pressure drop
It refers to, when the pre-filter works, the difference between the water inlet
pressure and the purified water outlet pressure.
Note. The unit is kilopascal (kPa).
3.7
Rated water flow
It refers to, under the working pressure of 0.2 MPa, the amount of water
produced per unit time.
Note 1. The unit is liters per hour (L/h).
Note 2. During the operation, it may conduct such flux recovery operation as
flush and backflush in accordance with the methods as specified by the
manufacturer.
3.8
Rated production capacity
It refers to the total amount of water filtered when the flushing cannot make
the flux recover or cannot make it reach to the expected filtration accuracy
after the filter element is used for a certain period.
Note. The unit is cubic meters (m3).
4 Product classification and model designation
4.1 Product classification
Depending on the specifications, the pre-filters are divided into the following
categories.
- Filter element type.
5.1.2 Environmental conditions
a) Temperature. 4 °C ~ 40 °C;
b) Avoid direct sunlight;
c) Relative humidity. not more than 90% (at 25 °C).
5.2 Appearance
Appearance shall be clean and neat and free from rust or burr.
5.3 Structure
5.3.1 CONDUCT static pressure test, AND the pre-filter shall have no leakage
or permanent deformation.
5.3.2 In the water purification or backflush state, CONDUCT the cycle pressure
test, AND the pre-filter shall have no leakage or permanent deformation.
5.3.3 CONDUCT the burst pressure test, AND the pre-filter shall have no
leakage or permanent deformation. The pre-filter equipped with plastic barrel
shall be able to withstand the static pressure 4 times of the maximum working
pressure OR 2.76 MPa (whichever is larger).
5.4 Use performance
5.4.1 Purified water flow
The actual purified water flow shall not be less than the rated water flow.
5.4. 2 Retention rate
Retention rate shall not be less than 90%.
5.4.3 Pressure drop
At the rated working flow, the working pressure drop of the totally new pre-filter
shall not exceed 50 kPa.
The water flow shall not be less than the provisions in Table 1.
Table 1 Corresponding relationship between water flow and nominal size
Nominal size DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100
Flow rate Q/(m3/h) 1.27 2.27 3.6 5.8 9.1 14 24 36 53
Note. The flow velocity of the flow rate corresponding to the above data is about 2 m/s.
SET the initial pressure of the pre-filter during cycle pressure test at 150 kPa,
AND the final pressure at 1.5 times of the maximum working pressure OR 1.04
MPa (whichever is larger); the cycle number is 100000 AND the frequency is
(15 ± 2) times/min.
INSTALL the pre-filter in the device as shown in Figure 1; the pressure increase
time shall be greater than 1 s; before starting another cycle, it shall decrease
the pressure to below 150 kPa.
6.3.3 Burst pressure test
INSTALL the pre-filter in the device as shown in Figure 1; MAKE the pressure
increase not less than 0.69 MPa/s AND reach to the required pressure within
70 s; MAINTAIN for 5 s; RELEASE pressure.
6.4 Use performance
6.4.1 Water flow
Under the test conditions as required in 6.1, in accordance with the use
instructions, INSTALL the pre-filter; after working normally for 5 min, from the
water outlet sampling port, TAKE the purified water for (60 ± 1) s; WEIGH it and
CALCULATE the water flow, in the unit of L/h.
6.4.2 Retention rate
6.4.2.1 Preparation for test
The standard particle and amount are shown in Table 3. The selected particle
DN50 size shall correspond to the declared retention particle size. Particle size
is in normal distribution, AND the difference between the maximum particle size
and the minimum particle size shall be less than 30 μm.
Table 3 Particle size and amount
Nominal size ≤DN25 DN25 ≥DN25
Amou...