QB/T 2806-2017 PDF in English
QB/T 2806-2017 (QB/T2806-2017, QBT 2806-2017, QBT2806-2017)
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Thermotatie faucets
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| QB 2806-2006 | English | 180 |
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[Replaced by QB/T 2806-2017] Thermostatic faucets
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Standards related to (historical): QB/T 2806-2017
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QB/T 2806-2017: PDF in English (QBT 2806-2017) QB/T 2806-2017
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.060
Classification number: Y71
Registration number: 59735-2017
Replacing QB/T 2806-2006
Thermostatic faucets
温控水嘴
ISSUED ON: JULY 07, 2017
IMPLEMENTED ON: JANUARY 01, 2018
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification and naming ... 8
5 Conditions of use ... 8
6 Materials ... 9
7 Supporting devices ... 9
8 Requirements ... 9
9 Single-handle three-control thermostatic faucet ... 17
10 Test methods ... 19
11 Inspection rules ... 24
12 Marking, packaging, transportation, storage ... 27
Appendix A (Normative) Size of faucet ... 29
Appendix B (Normative) Test of temperature stability of outlet water ... 44
Appendix C (Normative) Safety test (all models) ... 47
Appendix D (Normative) Test of service life ... 48
Appendix E (Normative) Test of flow regulator’s torque ... 50
Appendix F (Normative) Test of temperature regulator’s torque ... 51
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is a revision of QB 2806-2006 “Thermostatic faucets”. Compared
with QB 2806-2006, except editorial changes, the main technical changes are
as follows:
- CHANGE the nature of this standard to recommended;
- ADD the requirements for the amount of metal contaminant released by the
thermostatic faucet;
- MODIFY the material requirements;
- ADD the supporting equipment;
- DELETE the surface quality requirements for rubber parts;
- DELETE the hardness requirements for ceramic valve;
- DELETE the P-type thermostatic faucet;
- ADD the single-handle three-control thermostatic faucet;
- MODIFY the outlet water temperature from 38 °C to 40 °C;
- MODIFY the requirements for surface corrosion resistance;
- ADD the safety requirements for hot-water loss.
This standard was proposed by the China Light Industry Association.
This standard shall be under the jurisdiction of the National Hardware
Standardization Technical Committee Construction Hardware Subcommittee
(SAC/TC 174/SC 3).
Drafting organizations of this standard: Zhuhai Shulima Temperature Control
Sanitary Equipment Co., Ltd., Zhuhai Pulemei Kitchen & Bath Co., Ltd., Ningbo
Aimeike Copper Valve Co., Ltd., Guangdong Huayi Sanitary Ware Co., Ltd.,
Guangzhou Moen Plumbing Equipment Co., Ltd., China Hardware Products
Association, Xiamen Songlin Technology Co., Ltd., Taizhou Guoren
Temperature Control Sanitary Ware Co., Ltd., Guangdong Hengjie Sanitary
Ware Co., Ltd., Rifeng Enterprise Group Co., Ltd., Yading Creative Home Co.,
Ltd., Ningbo Aoleishi Sanitary Ware Co., Ltd., Zhongyu Building Materials
Group Co., Ltd., Shanghai Jianke Inspection Co., Ltd., Foshan Quality
Measurement Supervision and Inspection Center, Shanghai Construction
Hardware Industry Research Institute Co., Ltd.
Thermostatic faucets
1 Scope
This standard specifies the terms and definitions, classification and naming,
conditions of use, materials, supporting devices, requirements, single-handle
three-control thermostatic faucets, test methods, inspection rules, marking,
packaging, transportation and storage of thermostatic faucets.
This standard applies to the cold-water & hot-water mixed faucet which is at
nominal pressure, has an ordinary-water-pressure of not more than 0.5 MPa
and a high-water-pressure of not more than 2 MPa, a cold-water temperature
of 4 °C ~ 29 °C and a hot-water temperature of 45 °C ~ 85 °C, is mounted on
the sanitary facilities in the washroom (toilets, bathroom, etc.), kitchen and so
on, whose outlet water temperature is automatically controlled by the pre-
selected temperature.
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 2828.1-2012 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 5270-2005 Metallic coatings on metallic substrates - Electrodeposited
and chemically deposited coatings - Review of methods available for testing
adhesion
GB/T 6461-2002 Methods for corrosion testing of metallic and other
inorganic coatings on metallic substrates - Rating of test specimens and
manufactured articles subjected to corrosion tests
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight
joints are made on the threads - Part 1: Parallel internal and taper external
threads
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight
joints are made on the threads - Part 2: Taper internal and external threads
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight
joints are not made on the threads
GB/T 9286-1998 Paints and varnishes - Cross cut test for films
GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
GB 18145-2014 Ceramic cartridge faucets
GB/T 23447 Shower outlets for bathing
GB/T 23448 Flexible hose for sanitary tapware
JC/T 932 Drainage fittings for sanitary wares
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Thermostatic faucets
The faucets which, when the inlet water temperature and pressure change
within a certain range, automatically adjust the incoming flowrate of cold-
water and hot-water, to stabilize the outlet water temperature in a certain
range.
3.2
Single handle, double handle
The quantity of handles or handwheels which control the outlet water
temperature, flowrate, open-close of the faucets. Single handle refers to
using one handle or handwheel to control the outlet temperature or both
flowrate and open-close. Double handle refers to using two handles or
handwheels to respectively control the outlet water temperature, flowrate
and open-close.
3.3
Single handle double control, single handle three control
Single-handle double control refers to using one handle or handwheel to
control the outlet water temperature and open-close. Single-handle three-
control refers to using one handle or handwheel to control the outlet water
temperature, flowrate, open-close.
The thermostatic faucets which are used at the hydraulic pressure of 0.1
MPa ~ 2.0 MPa.
4 Classification and naming
4.1 Classification
4.1.1 According to the number of control handles, it is divided into single-handle
and double-handle.
4.1.2 According to the type of temperature control, it is divided into constant-
temperature faucet (hereinafter referred to as T) and constant-temperature
constant-pressure faucet (hereinafter referred to as TP).
4.1.3 According to the location of use, it is divided into shower, bathtub, washing,
basin, electric water heater, solar water heater, pipeline valve and so on.
4.1.4 According to the form of installation, it is divided into exposed-installation
and concealed-installation.
4.1.5 According to the use pressure, it is divided into ordinary-water-pressure
and high-water-pressure.
4.2 Naming
The name shall include the number of control handles, the type of temperature
control, the location of use, the form of installation, the pressure of use.
Example:
The product which has a single control handle, constant-temperature constant-
pressure temperature control, is used for bathtub, uses exposed installation and
high-water-pressure may be named as single-handle constant-temperature
constant-pressure exposed high-water-pressure faucet for bathtub use.
5 Conditions of use
5.1 Working pressure
5.1.1 Ordinary-water-pressure: water supply pressure 0.1 MPa ~ 0.5 MPa. If it
exceeds 0.5 MPa, it shall add a relief valve.
5.1.2 High-water-pressure: water supply pressure 0.1 MPa ~ 2.0 MPa. It is
recommended for the water pressure for normal use to be 0.3 MPa ~ 1.5 MPa.
5.2 Temperature for use of medium
overflows, shrinkage, warpage, fusion mark.
8.2 Surface performance
8.2.1 Adhesion strength of coating and plating
8.2.1.1 Adhesion strength of coating
The cross-cut test shall be carried out according to 10.2.1.1, it shall reach the
requirements of grade-1.
8.2.1.2 Adhesion strength of metal substrate’s plating
After the thermal shock test according to 10.2.1.2, there shall be no cracking,
peeling or falling off.
8.2.1.3 Adhesion strength of plastic substrate’s plating
After the test according to 10.2.1.3, the surface shall be free of cracks, pinholes
or looseness.
8.2.2 Surface corrosion resistance
After the acid salt spray test according to 10.2.2, it shall not be lower than the
grade-9 appearance rating (RA) requirements in Table 1 of the GB/T 6461-2002.
8.3 Thread
8.3.1 The external sealing pipe thread of the product shall comply with the
provisions of GB/T 7306.1 or GB/T 7306.2. The external non-sealing pipe
thread of the product shall comply with the provisions of GB/T 7307.
8.3.2 The surface of the thread shall be smooth and there shall be no obvious
defects such as dents and broken teeth.
8.4 Assembly
8.4.1 The assembled handle or handwheel shall be light, stable, free from
jamming. The transfer switch shall be light, stable, free from jamming when
lifted or pulled. The pull-up part and the lift-up bar of the transfer switch shall be
firmly connected. The rotating outlet pipe of the faucet shall be rotated light and
free from jamming.
8.4.2 The cold-water and hot-water inlet mark and temperature adjustment
mark shall be clear; the mark is firmly combined with the faucet body. Blue or
the letter “C” is cold-water, red or the letter “H” is hot-water. When the faucets
are horizontally arranged, the cold-water mark is at right side and the hot-water
mark is at left side. When the faucets are vertically arranged, the cold-water
mark is below the hot-water mark. It may use other easily-identifiable means to
Table 6
Nominal size
DN
Change of outlet water temperature / °C
Water supply temperature unchanged,
pressure changed by 20%
Water supply pressure unchanged, hot-water
temperature changes within 55 °C ~ 70 °C
15 ≤ ±2 ≤ ±2.5
20 ≤ ±3 ≤ ±3.6
32 ≤ ±3.9 ≤ ±4.4
8.7.5 Safety
8.7.5.1 Conditions
The inlet water temperature at cold-water end is 15 °C ~ 20 °C, the inlet water
temperature at hot-water end is 65 °C ~ 70 °C, the water supply dynamic
pressure is (0.3 ± 0.03) MPa, the mixed outlet water temperature is (40 ± 2) °C.
It shall comply with the provisions of 8.7.5.2.
8.7.5.2 Safety requirements
8.7.5.2.1 After the cold-water is closed, the outlet water flow within 5 s shall be
reduced to ≤ 1.9 L/min, meanwhile the outlet water temperature shall be ≤ 49 °C.
8.7.5.2.2 After the cold-water supply is restored, the deviation between the
mixed water outlet temperature and the set temperature within 5 s shall not
exceed ± 2 °C.
8.7.5.2.3 After the hot-water is closed, the outlet water flow within 5 s shall be
reduced to ≤ 1.9 L/min.
8.7.5.2.4 After the hot-water supply is restored, the deviation between the mixed
water outlet temperature and the set temperature within 5 s shall not exceed
±2 °C.
8.7.6 Maximum outlet water temperature
Under the temperature conditions of use of medium in 5.2, the faucet shall be
able to limit the maximum outlet water temperature to ≤ 49 °C.
8.7.7 Service life
After the service life reaches the requirements of Table 7, it shall comply with
the requirements of Table 7. After the service life test, the temperature regulator
and the flow regulator shall be free from jamming or loss of control.
The test medium is air. First place the faucet in an environment of (70 ± 2) °C
for 30 minutes. Take it out. Maintain it at (15+5, 0) °C for 15 min. Then place it in
an environment of (-30+5, 0) °C for 30 min. Take it out. Maintain it at (15+5, 0) °C
for 15 min. The above process forms one cycle. After 5 consecutive cycles,
check the plating surface.
10.2.2 Test of resistance to surface corrosion
The faucet is subjected to 24 h acetate salt spray test according to GB/T 10125-
2012. The results are graded according to the standard GB/T 6461-2002.
10.3 Thread
The surface quality of the pipe thread is checked by visual inspection. Visual
inspection shall be carried out under natural scattered light or white light without
reflected light. The illuminance shall be no less than 300 lx. Pipe thread’s
accuracy is measured by a thread gauge of the corresponding accuracy.
10.4 Assembly
The faucet assembly is checked by hand touching. The hot-water and cold-
water mark are visually inspected, during which the control device is faced.
10.5 Size
The size of the faucet is tested by a gauge of corresponding accuracy.
10.6 Precipitation of metal contaminants
The precipitation of metal contaminants from the faucet is as shown in Appendix
B of GB 18145-2014.
10.7 Performance of use
10.7.1 Test of anti-hydraulic mechanical performance
10.7.1.1 Test of anti-hydraulic mechanical performance upstream of valve
element
Install the faucet on the test equipment according to the state of use. Close the
valve element. Introduce the pressure value (2.50 ± 0.05) MPa from the water
inlet. Hold the pressure for (60 ± 5) s. Any parts upstream of the faucet shall be
free from permanent deformation.
10.7.1.2 Test of anti-hydraulic mechanical performance downstream of
valve element
Install the faucet on the test equipment according to the state of use. Open the
valve element. For the faucet whose water outlet is equipped with flow regulator,
flows to the shower. Manually block the shower water outlet of faucet. Let the
water outlet of bathtub be opened. Apply a static pressure of (0.40 ± 0.02) MPa
at the water inlet of faucet for (60 ± 5) s. Gradually reduce the pressure to the
static pressure of (0.05 ± 0.01) MPa. Hold pressure for (60 ± 5) s. Check
whether the water outlet of the bathtub has leakage.
For the faucets for multiple shower water outlets, it shall respectively test each
water outlet position.
10.7.2.1.3.2 Test of sealing performance of transfer switch for top
sprinkler and hand-hold sprinkler
Install the faucet on the test equipment according to the state of use. Adjust the
transfer switch to the position where the water flows to the shower. Adjust the
top sprinkler and the hand-held sprinkler to the top sprinkler mode. Manually
block the water outlet of the faucet which connects the top sprinkler. Let the
water outlet which connects the hand-hold sprinkler be opened. Apply a static
pressure of (0.40 ± 0.02) MPa to the water inlet of the faucet for (60 ± 5) s.
Gradually reduce the pressure to the static pressure of (0.05 ± 0.01) MPa. Hold
the pressure for (60 ± 5) s. Check whether the water outlet of the faucet which
connects the hand-hold sprinkler has leakage. Then adjust the transfer switch
to the hand-hold sprinkler mode. Manually block the water outlet of the faucet
which connects the hand-hold sprinkler. Let the water outlet which connects the
top sprinkler to be opened. Apply a static pressure of (0.40 ± 0.02) MPa to the
water inlet of the faucet for (60 ± 5) s. Gradually reduce the pressure to the
static pressure of (0.05 ± 0.01) MPa. Hold the pressure for (60 ± 5) s. Check
whether the water outlet of the faucet which connects the top sprinkler has
leakage
10.7.2.1.4 Test of sealing performance of automatic reset transfer switch
for bathtub and shower
Install the faucet on the test equipment according to the state of use. Install a
liquid resistor which has a flowrate of 0.15 L/s (at the pressure of 0.1 MPa) at
the water outlet position of the shower. Adjust the transfer switch to the position
where the water flows to the bathtub. Let both the water outlets of bathtub and
shower be opened. Apply a dynamic pressure of (0.40 ± 0.02) MPa to the water
inlet of faucet for (60 ± 5) s. Check whether the water outlet of the shower has
leakage.
Place the transfer switch to the position where the water flows to the shower.
Let both the water outlets of bathtub and shower be opened. Apply a dynamic
pressure of (0.40 ± 0.02) MPa to the water inlet of faucet for (60 ± 5) s. Check
whether the bathtub has leakage. Gradually reduce the pressure to (0.05 ± 0.01)
MPa. Hold this pressure for (60 ± 5) s. Check whether the position of the
transfer switch is moving and whether the water outlet of the bathtub leaks.
The test method of service life is as shown in Appendix D. The test method of
service life of the transfer switch is as shown in Appendix F of GB 18145-2014.
10.7.8 Test of resistance to installation load
The test method of the resistance to installation load of the faucet’s connected
pipe thread is as shown in 8.6.4 of GB 18145-2014.
10.7.9 Test of resistance to use load
10.7.9.1 The test method of flow regulator’s torque is as shown in Appendix E.
10.7.9.2 The test method of temperature regulator’s torque is as shown in
Appendix F.
10.7.9.3 The normal use torque shall not exceed 1.7 N • m if measured by a
torque wrench which has a 3% precision reading.
10.8 Single-handle three-control thermostatic faucet
10.8.1 Test of sealing performance
It is tested according to 10.7.2.
10.8.2 Flowrate test
It is tested according to 10.7.3.
10.8.3 Test of temperature stability of outlet water
It is tested according to 10.7.4.
11 Inspection rules
11.1 Classification of inspections
Product inspection is divided into exit-factory inspection and type inspection.
11.2 Exit-factory inspection
11.2.1 Items for exit-factory inspection include 8.1, 8.3, 8.4, 8.7.2.
11.2.2 The unqualified classification and acceptance quality limits of the exit-
factory inspection items are as shown in Table 9.
l1 = (600 ± 50) mm, l2 = (300 ± 30) mm, R is the radius of the center line, which
is ≥ 4 times the inner diameter of the water pipe;
P is a pressure gauge, T is a thermometer, Q is a flow meter.
Figure B.1
B.3 Test method
B.3.1 Test methods for T-type products
a) According to the test conditions of B.2, the hot-water supply pressure is
reduced by 20% of the initial test conditions [i.e. the hot-water supply
pressure is reduced from (0.30 ± 0.03) MPa to (0.24 ± 0.02) MPa within 1
s], observe and record the temperature change for (25 ± 5) s at T3;
b) Restore the test conditions of B.2, the hot-water supply pressure is
increased by 20% of the initial test conditions [i.e. the hot-water supply
pressure is increased from (0.30 ± 0.03) MPa to (0.36 ± 0.03) MPa within
1 s], observe and record the temperature change for (25 ± 5) s at T3;
c) Restore the test conditions of B.2, the cold-water supply pressure is
reduced by 20% of the initial test conditions [i.e. the cold-water supply
pressure is reduced from (0.30 ± 0.03) MPa to (0.24 ± 0.02) MPa within 1
s], observe and record the temperature change for (25 ± 5) s at T3;
d) Restore the test conditions of B.2, the cold-water supply pressure is
increased by 20% of the initial test conditions [i.e. the cold-water supply
pressure is increased from (0.30 ± 0.03) MPa to (0.36 ± 0.03) MPa within
1 s], observe and record the temperature change for (25 ± 5) s at T3;
e) Restore the test conditions of B.2, increase the hot-water supply
temperature by 13 °C at a temperature-rise rate of (3.0 ± 0.6) K/min,
observe and record the temperature change for (25 ± 5) s at T3.
B.3.2 Test methods for TP-type products
First complete the T-type product test according to B.3.1, then complete the
following test:
a) Restore the test conditions of B.2, the hot-water supply pressure is
reduced by 50% of the initial test conditions, observe and record the
temperature change for (25 ± 5) s at T3;
b) Restore the test conditions of B.2, the hot-water supply pressure is
increased by 50% of the initial test conditions, observe and record the
temperature change for (25 ± 5) s at T3;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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