JB/T 7230-2013 English PDF (JBT7230-2013)

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JB/T 7230-2013: Four-way electromagnetic reversing valve for heat pump
JB/T 7230-2013
MACHINERY INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
Record No.: 40598-2013
Replacing JB/T 7230-1994
Four-way electromagnetic
reversing valve for heat pump
ISSUED ON: APRIL 25, 2013
IMPLEMENTED ON: SEPTEMBER 01, 2013
Issued by: Ministry of Industry and information Technology of PRC
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Model and Basic Parameters ... 8
4.1 Model ... 8
4.2 Basic parameters ... 8
4.3 Nominal condition ... 9
4.4 Operating condition ... 9
5 Requirements ... 10
5.1 General requirements ... 10
5.2 Performance requirements ... 10
5.3 Destructive strength ... 14
6 Test Methods ... 14
6.1 Test instruments and apparatuses ... 14
6.2 General requirement test ... 15
6.3 Performance requirement test ... 15
6.4 Destructive strength test ... 21
7 Inspection Rules ... 21
7.1 General requirements ... 21
7.2 Inspection classification ... 21
7.3 Exit-factory inspection ... 22
7.4 Sampling inspection ... 22
7.5 Type inspection ... 23
8 Marking, Package, Transportation and Storage ... 23
8.1 Marking ... 23
8.2 Package ... 24
8.3 Transportation ... 24
8.4 Storage ... 24
Appendix A (Normative) Heat Exchanger Model Preparation Method ... 25
A.1 Heat exchanger model preparation method ... 25
A.2 Model example ... 25
Appendix B (Normative) Determination of the Nominal Capacity of Reversing
Valve ... 26
B.1 Measuring device ... 26
B.2 Position and requirements of measuring point ... 26
B.3 Test procedures ... 27
B.4 Calculation of nominal capacity ... 27
Figure 1 – Schematic Diagram for Nominal Capacity of 50kW and below ... 7
Figure 2 – Schematic Diagram of Nominal Capacity of 70kW and below ... 8
Figure 3 – Sealing Test Device Diagram ... 17
Figure 4 – Compressive Strength Test Device Diagram ... 17
Figure 5 – Minimum Reversing Pressure Difference Test Device ... 18
Table 1 – Basic Parameters ... 9
Table 2 – Nominal Condition ... 9
Table 3 – Operating Condition ... 10
Table 4 – Cleanliness ... 11
Table 5 – Internal Leakage ... 12
Table 6 – Heating Temperature ... 13
Table 7 – Minimum Destructive Pressure ... 14
Table 8 – Test Voltage ... 19
Table 9 – Inspection Rules ... 22
Table 10 – Sampling Plan ... 23
Four-way electromagnetic
reversing valve for heat pump
1 Scope
This Standard specifies the terms and definitions, model, basic parameters,
requirements, test methods, inspection rules, marking, package and storage of heat
pump four-way electromagnetic reversing valve for refrigeration equipment
(hereinafter referred to as “reversing valve”).
This Standard is applicable the four-way electromagnetic reversing valve for the
purposes of cooling and heating by changing the flow direction of the refrigerant in the
refrigeration device with refrigerants of R22, R134a, R404A, R407C, R410A, and the
valve’s nominal capacity of no more than 210kW.
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 document.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods
GB/T 2423.1 Environmental Testing - Part 2: Test Methods - Tests A: Cold
GB/T 2423.2 Environmental Testing - Part 2: Test Methods - Tests B: Dry Heat
GB/T 2423.3 Environmental Testing―Part 2: Testing Method - Test Cab: Damp
Heat, Steady State
GB/T 2423.17 Environmental Testing for Electric and Electronic Products - Part 2:
Test Method - Test Ka: Salt Mist
GB/T 2624 (all parts) Measurement of Fluid Flow by Means of Pressure Differential
Devices Inserted in Circular Cross-Section Conduits Running Full
GB/T 6283 Chemical Products - Determination of Water Karl · Fischer Method
(General Method)
--- Under normal temperature condition, the insulation resistance between the live
parts and the non-live parts shall be greater than 100MΩ;
--- After the damp heat resistance test, the insulation resistance of the solenoid coil
of reversing valve shall be no less than 1.5MΩ.
5.2.6.3 Under the specified test method of the solenoid coil of the reversing valve, the
heating temperature requirements shall conform to the provisions of Table 6.
Table 6 – Heating Temperature
5.2.6.4 The solenoid coil of reversing valve shall meet the requirements of self-
extinguishing within 60s.
5.2.6.5 The solenoid coil of the reversing valve, after the damp heat resistance test,
shall meet the requirements of 5.2.6.1 and 5.2.6.2.
5.2.7 Low temperature resistance
After the low-temperature resistance test, the reversing valve shall meet the
requirements of 5.2.2, 5.2.4, 5.2.5, 5.2.6.1, 5.2.6.2.
5.2.8 High temperature resistance
After the high-temperature resistance test, the reversing valve shall meet the
requirements of 5.2.2, 5.2.4, 5.2.5, 5.2.6.1, 5.2.6.2.
5.2.9 Cold-thermal cycle resistance
After the cold-thermal cycle resistance test, the reversing valve shall meet the
requirements of 5.2.2, 5.2.4, 5.2.5, 5.2.6.1, 5.2.6.2.
5.2.10 Vibration resistance
During the vibration test, there shall be no loosening of the solenoid coil of reversing
valve and the falling-off and breaking of the weld-seam. After the test, the reversing
valve shall meet the requirements of 5.2.2, 5.2.4, 5.2.5, 5.2.6.1, 5.2.6.2.
5.2.11 Durability
After the durability test, the reversing valve shall meet the requirements of 5.2.2, 5.2.4,
5.2.5, 5.2.6.1, 5.2.6.2.
5.2.12 Corrosion resistance
Heat resistance level
Temperature °C
 The accuracy of the flowrate measuring instrument shall be ±2% reading
value within the entire flowrate measuring range; the division value shall not
exceed 2.5 times of the specified accuracy;
 The design, manufacture, installation and use of the flowrate measuring and
throttling device shall be in accordance with provisions of GB/T 2624.
--- The electrical measuring instruments shall meet the following requirements:
 Voltmeter: depends on the voltage under test. When the voltage under test is
greater than 150V~300V, the accuracy tolerance shall be ±1.50V; when it is
greater than 300V~750V, the accuracy tolerance shall be ±3.75V;
 Ammeter: accuracy shall be ±1% of the indicated value of the ammeter;
 Resistance meter: accuracy shall be ±1% indicated value of the bridge type
resistance meter;
 The division value of the electrical measuring instrument shall not exceed 2
times of the specified accuracy.
6.2 General requirement test
6.2.1 Check the interface and appearance size of the reversing valve by the plug gauge
and Vernier caliper.
6.2.2 Check the materials entering the factory according to the corresponding
standards; or check the material physical and chemical property test report, certificate
of conformity and other relevant information.
6.2.3 Appearance quality inspection shall be carried out by visual examination.
6.3 Performance requirement test
6.3.1 Cleanliness test
The contents of the cleanliness test are as follows:
a) Impurity content test
Before use, the glass sand crucible shall be firstly washed by hydrochloric acid,
then washed by the distilled water; place in the 120°C±2°C oven to bake for
30min; cool off to the room temperature...