This standard specifies the requirements, test methods, and determination of the number of static pressure life tests for industrial sealed butterfly valves. JB/T 8863-2004 Butterfly valve static pressure life test procedures JB/T8863-2004 Standard download decompression password: www.bzxz.net

1cS 22.060.30
Mechanical Industry Standard of the People's Republic of China
JB/T8863-—2004
Replaces B8863—1999
Static Pressure Life Test Procedure
Butterfly valve-potential pressure lifetest regulation2004-03-12issued
2004-08-01implemented
National Development and Reform Commission of the People's Republic of Chinaissued statement
2 non-application documents
3 unapproved definition
test force method,
determination of static service life test times
.Termination test.
6.2 static test times
Salu A (informative appendix) test age record
Figure 1 static life test system, principle
Table A static pressure life test adjustment data record
3BT6863--2004
E/18863-2004
This standard is a revision of 8863-1 combustion static pressure life test procedure. Compared with JB/T8863-1999, this standard has the following changes: 1. The application scope of the standard has been changed: it is applicable to the static pressure life test of abandoned channels; 2. The referenced standards have been added: the valve opening in some requirements has been modified, the test capacity, test tolerance, force control requirements, etc.; 3. The test method has been supplemented and modified. This standard replaces JBT8863-1999. 4. The attached A force data appendix of this standard is proposed by the China Machinery Industry Association. This standard is organized by the National Standardization Technical Committee (SAC/TC188): 5. The origin of this standard: General Standard Institute of China. The main drafters of this standard: Wang Xiaogou, Liu Xiaochun, Zheng Zouqiang. The standards replaced by this standard are: JB/Z248-1985, JB/T8863-199. f
1 Scope
Static pressure life test procedure for butterfly valves
B/TB863—2004
This standard specifies 1 Requirements and test methods for static positive life test of industrial type valves, determination of the number of static pressure life test, and static pressure life test of industrial type valves. 2 Normative referenced documents
The clauses in the following documents become the clauses of this standard through reference to this standard. For all referenced documents with a date not specified, all subsequent amendments, including errors, or revised versions are not applicable to this standard. However, the parties who have reached an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without a date not specified, their latest versions are applicable to this standard. (RT13927-1992 General Test (NEJSO5208:1982) 3 Terms and Definitions
The following terms and definitions apply to this standard.
Potential pressure life test Under the condition of the whole room, when the valve is under the action of certain pressure: a test of cyclic operation from full open to full closed is carried out. 3.2
Static pressure life test time of potentlal press n relife test Static pressure life test is also carried out. The total number of closing cycles that can maintain the performance required by the standard is 10,000. 4 Requirements
4.1 The media that needs to be tested for static pressure life is a wide seal type, and the performance of the valve meets the requirements of GBT13927. , 4.2 The static pressure life test system is shown in Figure 1. Pressure gauge: 3 pressure vessel; 4 - water, 5 - air system valve, 6 - valve front pressure gauge: 2
drive L gear: B
- pressure gauge: JU - control valve: 11 - a test valve;
Figure 1 static pressure life test system
- hydraulic release valve,
JB/T8863-·2004
4.3 The test medium is warm water. If air is used as the test medium, the rated pressure difference of the valve should be connected to control the opening pressure difference of the test village. 4.4 The valve is operated in what way. When conducting a static pressure life test, the device it is equipped with should be able to carry out an opening and closing cycle test with the valve: handle (wheel) Manually operated valves driven directly or by a reduction mechanism; the driving machine of the butterfly valve drives the handle (wheel) or the handwheel of the wheel speed mechanism; the butterfly valve driven by electric, hydraulic, pneumatic or other electric reduction and pneumatic linkage devices, use the recommended operating drive device to perform opening and closing cycle tests: 4.5 Static life test, starting from the fully closed and sealed position, the degree of the valve should reach more than 9% of its actual system pressure. 4.6 During the static life test, from the open position to the closed process, the medium should be filled with medium, and the pressure should be 90%~1K of the nominal pressure of the valve: after reaching the closed position: the outlet side of the medium valve releases the medium pressure: the butterfly valve opens under the pressure difference of the test medium, and the medium has a certain differential pressure. During the test, the certain pressure difference should be used as the test pressure. 4.7 The media that closes the seal by the stroke position control, the closed position is controlled during the test: the media that closes the seal by the torque, the test is carried out according to the maximum opening and closing torque obtained by the test measurement, and the media seal should be maintained at each opening and closing, and the operating force should not exceed the operating torque that can be generated by the operating wheel equipped with the media cabinet or the operating torque specified in the product standard. 4.8 The repeated deviation of the stroke position should be less than 1: the repeated deviation of the operating torque should be less than 5%. 4.9 During the static pressure life test, according to the characteristics of the sealing pair, the sealing operating torque should be checked every 200-500 self-closing cycles: after the commercial seal performance is qualified, continue to test: for the media that is operated dynamically, the operating force can be adjusted if the change is made, and the media that cannot be adjusted by other operating mechanisms cannot be adjusted. 4.10 If the valve has installation requirements, it should be installed in the required installation position and installed in the flow direction required by the valve. If there is no flow direction requirement, it can be installed in any direction.
4.11 The record of the number of pre-pressure life test should be recorded by the life test machine or electric, dynamic, pneumatic or other electro-hydraulic and gas linkage devices receiving the signal provided by the end travel switch, and using the electric disk counter to record 5 Test method
5.1 Check the sealing operation mode of the medium, confirm whether it is closed by position or closed by torque. 5.2 If the end valve is closed by torque, under the pressure of 100% of the medium pressure and the nominal pressure (or rated pressure difference), use the maximum operating force when opening and closing the medium to test three times, and the maximum value is obtained. 5.3 Install the scale, adjust the control mode and output torque of the drive mechanism to meet the operating requirements of the closing filter of the operator, and meet the sealing performance requirements.
5.4 After 200 to 300 opening and closing cycles, check the leakage of the sealing surface: if the operating torque changes, the output torque of the drive mechanism should be adjusted in time to meet the sealing requirements. If it does not meet the requirements of 4. of this standard, terminate the test. 6 Determination of the number of static pressure life test
6.1 Termination of test
The test shall be terminated when the following situations occur:) During the sealing test, the sealing performance cannot meet the standard requirements, the valve stem packing cannot maintain sealing, other parts of the valve are leaking, etc.bzxz.net
The valve stem, sleeve and other parts of the butterfly valve are worn, the opening and closing operation cannot be carried out properly, or the opening and closing torque of the butterfly valve is greatly changed, which does not meet the requirements of 4.5 of this standard.
6.2 Number of static pressure life test
8.2.1 After reaching the required number of tests, when the performance of the valve meets the standard requirements, this number of tests shall be the static pressure life test number. 6.2.2 If any abnormal situation occurs during the test or the performance does not meet the standard requirements, the number of opening and closing cycles corresponding to the termination of the previous inspection shall be the number of static pressure life test. , specifications
before the test, the external mechanism is operated during the test of the tightness difference performance of the standard test
test,
static jade life
test the fault
MP, the opening and closing operation is the moment
case sealing screening situation
test record
operating torque
common parts of the situation
JB/T88632004
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