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GB/T 26750-2011 English PDF (GBT26750-2011)
GB/T 26750-2011 English PDF (GBT26750-2011)
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GB/T 26750-2011: Sanitary ware -- Pressure assistant water flushing devices
GB/T 26750-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.70
Q 31
Sanitary Ware – Pressure Assistant Water Flushing Devices
ISSUED ON: JULY 20, 2011
IMPLEMENTED ON: MARCH 01, 2012
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration 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 ... 6
4.1 Pressure assistant water flushing devices ... 6
4.2 Pressure assistant flush tank ... 6
4.3 Pressure flushing valve ... 6
5 Materials, Spare and Accessory Parts ... 7
6 Technical Requirements ... 7
6.1 Pressure assistant flush tank ... 7
6.2 Flushometer valve ... 10
6.3 Non-contact pressure flushing valve ... 13
7 Test Methods ... 17
7.1 Test method for pressure assistant flush tank ... 17
7.2 Test method of flushometer valve ... 22
7.3 Test method of the non-contact pressure flushing valve ... 28
8 Inspection Rules ... 31
8.1 Inspection classification ... 31
8.2 Exit-factory inspection ... 31
8.3 Type inspection ... 32
8.4 Sampling method ... 35
9 Marking and Identification ... 35
10 Packaging, Transportation and Storage of Product ... 35
Appendix A (Normative) Test on Thread Torque and Tensile Strength ... 36
Appendix B (Normative) Water Hammer Test ... 38
Sanitary Ware – Pressure Assistant Water Flushing Devices
1 Scope
This Standard specifies the terms and definitions, product classification, materials and spare
parts, technical requirements, test methods, inspection rules, marking and labelling, packaging,
transportation and storage of pressure assistant water flushing devices.
This Standard applies to pressure assistant water flushing devices installed on water supply
pipelines with a static pressure no greater than 0.6MPa and used in conjunction with various
toilets.
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) is applicable to this
Document.
GB/T 2423.1 Environmental Testing for Electric and Electronic and Electronic Products -
Part 2: Test Methods - Tests A: Cold
GB/T 2423.2 Environmental Testing for Electric and Electronic and Electronic Products -
Part 2: Test Methods - Tests B: Dry Heat
GB/T 2423.3 Environmental Testing for Electric and Electronic and Electronic Products -
Part 2: Test Methods – Test Cab: Damp Heat Steady State
GB/T 2828.1 Sampling Procedures for Inspection by Attribute - Part1: Sampling Schemes
Indexed by Acceptance Quality Limit (AQL) for Lot-by-Lot Inspection
GB/T 2829 Sampling Procedures and Tables for Periodic Inspection by Attributes (Apply
to Inspection of Process Stability)
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 6952 Sanitary Wares
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
3.6 Dynamic pressure
The steady pressure value in the pipeline when the flushing device is fully open.
3.7 Backflow preventer
A device or structure that is used to prevent water from flowing back into a water supply system
in the event of a system failure.
3.8 Consumption
The water consumption that is measured in a flushing cycle.
3.9 Water hammer
The instantaneous increase of pressure in the pipeline increases due to the closing of the valve,
when water flows normally in the pipeline.
3.10 Control distance
In the axial direction of the non-contact flushing device sensor receiving (or transmitting), when
the flushing device is reliably opened, the furthest distance between the analog board and the
sensor window.
4 Product Classification
4.1 Pressure assistant water flushing devices
It can be divided into pressure assistant flush tank and pressure flushing valve.
4.2 Pressure assistant flush tank
4.2.1 According to the mode of operation, it is divided into mechanical pressure assistant flush
tank and non-contact pressure assistant flush tank.
4.2.2 According to the installation form, it is divided into surface-mounted pressure assistant
flush tank and hidden pressure assistant flush tank.
4.3 Pressure flushing valve
4.3.1 According to the application, it is divided into closet pressure flushing valve and urinal
pressure flushing valve.
4.3.2 According to the mode of operation, it is divided into flushometer valve and non-contact
pressure flushing valve.
4.3.3 According to the pipe diameter, it is divided into DN15, DN20, DN25 and DN32 flushing
valves.
4.3.4 According to the installation form, it is divided into surface-mounted pressure flushing
valve and hidden pressure flushing valve.
4.3.5 The flushometer valves are divided into button type, wrench type, pedal type, twist handle
type and other operating modes of pressure flushing valves according to the drainage start mode.
5 Materials, Spare and Accessory Parts
5.1 All materials used in the product that are in direct contact with drinking water shall comply
with the provisions of GB/T 17219.
5.2 Products with electrical accessories shall comply with the provisions of GB 14536.1.
5.3 Other materials shall make the product meet the use requirements specified in this Standard.
6 Technical Requirements
6.1 Pressure assistant flush tank
6.1.1 General requirements
6.1.1.1 Working range
The working range of pressure assistant flush tank is static pressure of (0.10~0.90) MPa.
6.1.1.2 Installation and maintenance
The pressure assistant flush tank shall be designed so that it can be replaced and repaired with
standard tools.
6.1.1.3 Operating force
The tensile load of the wrench-driven chain or traction wire shall be no less than 60N; and its
fixed load of the opening mechanism and wrench shall be no less than 30N.
6.1.1.4 Connection of water supply
6.1.1.4.1 The precision of the pipe thread connecting the pressure assistant flush tank and the
water inlet pipeline shall meet the requirements of Class-B precision in GB/T 7307.
6.1.1.4.2 Connection thread torque and tensile strength
Carry out the test according to Appendix A, apply a torque of 6Nm to the thread of G3/8, and
apply a torque of 10Nm to the thread of G1/2, and the threaded connection parts shall not be
damaged.
6.1.2.6 All surfaces shall be free from sharp edges and corners that may cause harm to the
human body.
6.1.3 Performance
6.1.3.1 Flushing water consumption
Whether the pressure assistant flush tank has a water volume adjustment device or a flow
adjustment device is determined by the manufacturer. The water consumption of the pressure
assistant flush tank matched with the toilet shall meet the water consumption requirements of
the toilet in GB 6952 or the water consumption requirements specified by the product. For
pressure assistant flush tank that are not matched with sanitary ware, the flushing water
consumption of the product shall be indicated; and the flushing water consumption shall be
determined according to 7.2.4.3.
For products with adjustable flushing water volume, the method ...
Get QUOTATION in 1-minute: Click GB/T 26750-2011
Historical versions: GB/T 26750-2011
Preview True-PDF (Reload/Scroll if blank)
GB/T 26750-2011: Sanitary ware -- Pressure assistant water flushing devices
GB/T 26750-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.70
Q 31
Sanitary Ware – Pressure Assistant Water Flushing Devices
ISSUED ON: JULY 20, 2011
IMPLEMENTED ON: MARCH 01, 2012
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration 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 ... 6
4.1 Pressure assistant water flushing devices ... 6
4.2 Pressure assistant flush tank ... 6
4.3 Pressure flushing valve ... 6
5 Materials, Spare and Accessory Parts ... 7
6 Technical Requirements ... 7
6.1 Pressure assistant flush tank ... 7
6.2 Flushometer valve ... 10
6.3 Non-contact pressure flushing valve ... 13
7 Test Methods ... 17
7.1 Test method for pressure assistant flush tank ... 17
7.2 Test method of flushometer valve ... 22
7.3 Test method of the non-contact pressure flushing valve ... 28
8 Inspection Rules ... 31
8.1 Inspection classification ... 31
8.2 Exit-factory inspection ... 31
8.3 Type inspection ... 32
8.4 Sampling method ... 35
9 Marking and Identification ... 35
10 Packaging, Transportation and Storage of Product ... 35
Appendix A (Normative) Test on Thread Torque and Tensile Strength ... 36
Appendix B (Normative) Water Hammer Test ... 38
Sanitary Ware – Pressure Assistant Water Flushing Devices
1 Scope
This Standard specifies the terms and definitions, product classification, materials and spare
parts, technical requirements, test methods, inspection rules, marking and labelling, packaging,
transportation and storage of pressure assistant water flushing devices.
This Standard applies to pressure assistant water flushing devices installed on water supply
pipelines with a static pressure no greater than 0.6MPa and used in conjunction with various
toilets.
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) is applicable to this
Document.
GB/T 2423.1 Environmental Testing for Electric and Electronic and Electronic Products -
Part 2: Test Methods - Tests A: Cold
GB/T 2423.2 Environmental Testing for Electric and Electronic and Electronic Products -
Part 2: Test Methods - Tests B: Dry Heat
GB/T 2423.3 Environmental Testing for Electric and Electronic and Electronic Products -
Part 2: Test Methods – Test Cab: Damp Heat Steady State
GB/T 2828.1 Sampling Procedures for Inspection by Attribute - Part1: Sampling Schemes
Indexed by Acceptance Quality Limit (AQL) for Lot-by-Lot Inspection
GB/T 2829 Sampling Procedures and Tables for Periodic Inspection by Attributes (Apply
to Inspection of Process Stability)
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 6952 Sanitary Wares
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
3.6 Dynamic pressure
The steady pressure value in the pipeline when the flushing device is fully open.
3.7 Backflow preventer
A device or structure that is used to prevent water from flowing back into a water supply system
in the event of a system failure.
3.8 Consumption
The water consumption that is measured in a flushing cycle.
3.9 Water hammer
The instantaneous increase of pressure in the pipeline increases due to the closing of the valve,
when water flows normally in the pipeline.
3.10 Control distance
In the axial direction of the non-contact flushing device sensor receiving (or transmitting), when
the flushing device is reliably opened, the furthest distance between the analog board and the
sensor window.
4 Product Classification
4.1 Pressure assistant water flushing devices
It can be divided into pressure assistant flush tank and pressure flushing valve.
4.2 Pressure assistant flush tank
4.2.1 According to the mode of operation, it is divided into mechanical pressure assistant flush
tank and non-contact pressure assistant flush tank.
4.2.2 According to the installation form, it is divided into surface-mounted pressure assistant
flush tank and hidden pressure assistant flush tank.
4.3 Pressure flushing valve
4.3.1 According to the application, it is divided into closet pressure flushing valve and urinal
pressure flushing valve.
4.3.2 According to the mode of operation, it is divided into flushometer valve and non-contact
pressure flushing valve.
4.3.3 According to the pipe diameter, it is divided into DN15, DN20, DN25 and DN32 flushing
valves.
4.3.4 According to the installation form, it is divided into surface-mounted pressure flushing
valve and hidden pressure flushing valve.
4.3.5 The flushometer valves are divided into button type, wrench type, pedal type, twist handle
type and other operating modes of pressure flushing valves according to the drainage start mode.
5 Materials, Spare and Accessory Parts
5.1 All materials used in the product that are in direct contact with drinking water shall comply
with the provisions of GB/T 17219.
5.2 Products with electrical accessories shall comply with the provisions of GB 14536.1.
5.3 Other materials shall make the product meet the use requirements specified in this Standard.
6 Technical Requirements
6.1 Pressure assistant flush tank
6.1.1 General requirements
6.1.1.1 Working range
The working range of pressure assistant flush tank is static pressure of (0.10~0.90) MPa.
6.1.1.2 Installation and maintenance
The pressure assistant flush tank shall be designed so that it can be replaced and repaired with
standard tools.
6.1.1.3 Operating force
The tensile load of the wrench-driven chain or traction wire shall be no less than 60N; and its
fixed load of the opening mechanism and wrench shall be no less than 30N.
6.1.1.4 Connection of water supply
6.1.1.4.1 The precision of the pipe thread connecting the pressure assistant flush tank and the
water inlet pipeline shall meet the requirements of Class-B precision in GB/T 7307.
6.1.1.4.2 Connection thread torque and tensile strength
Carry out the test according to Appendix A, apply a torque of 6Nm to the thread of G3/8, and
apply a torque of 10Nm to the thread of G1/2, and the threaded connection parts shall not be
damaged.
6.1.2.6 All surfaces shall be free from sharp edges and corners that may cause harm to the
human body.
6.1.3 Performance
6.1.3.1 Flushing water consumption
Whether the pressure assistant flush tank has a water volume adjustment device or a flow
adjustment device is determined by the manufacturer. The water consumption of the pressure
assistant flush tank matched with the toilet shall meet the water consumption requirements of
the toilet in GB 6952 or the water consumption requirements specified by the product. For
pressure assistant flush tank that are not matched with sanitary ware, the flushing water
consumption of the product shall be indicated; and the flushing water consumption shall be
determined according to 7.2.4.3.
For products with adjustable flushing water volume, the method ...
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