Some standard content:
IS23.1c0.30
Machinery Industry Standard of the People's Republic of China
JB/T103742002
Hydraulic Fluid Power Relief Valve
Hydraulic Fluid Power Relief Valve2002-12-27 Issued
2003-04-01 Implementation
Before Issued by the State Economic and Trade Commission of the People's Republic of China
? Normative Non-use Documents
3 Terms and Definitions
4 Quantity, symbol and unit
5 Marking and basic parameters
5. Specifications
5.2 Basic parameters
6 Technical requirements
h General requirements
6.2 Performance requirements
6.3 Mixing requirements
G.4 External requirements
7 Performance test method
7.1 Experimental device
7.2 Test conditions
Test items and test methods
Assembly and operation test methods
9 Test regulations
9.1 Test types,
9.3 Rules
[Marking, installation, operation and storage
Thanks to A (international standard) test path and performance line A.1 Test risk mutual path
A.2 Characteristic line
National A" mountain! Test room circuit
Group test national circuit
Inlet two pressure internal leakage disk auxiliary line
System one load force outlet line.
Measurement force loss by line
Equal pressure characteristics by line...
Adjust pressure-regulating force distance controllable inlet line
Figure A through system diagram
Figure A.9 The inlet pressure response of the test valve 4 when the flow step is changed is displayed in Figure A.1 Injection pressure and unloading characteristics by line.
Table! , number and unit,
Table 2 Permissible variation range of sensor control parameters and average display values JB/T10374—2002
JB/T10974—2002
Table 3 Permissible systematic error of measuring system
Table 4 Factory test items and test methods
Table 5 Type test items and test methods
Table Assembly and appearance inspection methods
......
Appendix A of this standard is a normative appendix.
This standard Standard Reica letter outline industry joint conference proposed preface
This standard contains ten national hydraulic pneumatic standard cat north technical posture product conference JB/T10374-2002
Shanghai Hydraulic Pneumatic Corporation, North China Mechanical Industry Self-purchased Chemical Research Institute, Xiahai Shixin Pressure Parts, people from the joint group will be responsible for the joint group, Shanghai Hydraulic Parts Manufacturing Co., Ltd. participated in the drafting, the main individuals in the drafting: I Jianxin, Zhao Mianqiu, Song Chuangzhan, Institute of Meilian, Zhang Fanhua, Huaidong, weak east standard is the first release.|| tt||1 Standard National Hydraulic Relief Valve
JB/T10374—2002
This standard specifies the basic parameters, installation requirements, test methods, inspection requirements, packaging, transportation and storage of small-scale pressure relief valves, electromagnetic pressure relief valves and selectable pressure relief valves (hereinafter referred to as pressure relief valves). This standard is applicable to pressure relief valves with plate-type connection and selectable pressure relief valves with concentrated pressure or other media with equivalent performance as the working medium. 2 Regulatory References
The following documents All clauses of this standard shall become standard through the reference of this standard: all referenced documents shall be subject to all subsequent changes: no changes shall be made during the period of validity! The entire version shall not be applicable to this standard, however, the parties concerned shall select the most suitable standard and use the latest documents. For any documents that are not applicable, the latest version shall apply to this standard B785.1 Hydraulic and pneumatic graphics number: 786.1-1003.SO1219-: 1991FuwrsysdcurnponenisGraphi=. Symhals and cireul dingramis -- Part 1: Crapeic ytnhn's!GH/T234Pressure system and components Nominal pressure series H7%Reduction batch size Mutual piece number Description requirements and sample table (applicable to the inspection of the recent batch)GH/T287BPressure element transmission efficiency connection port type and size small hydraulic element general technical provisions
GET73S
CT8Collection flow control valve installation surface
GB/TBC99
GBTSIO1
Pressure stack installation surface
Liquid three relief valve installation surface (GB/18101-202, 1S06264:1998.Hydraulcfluidpccrre.surz-relief vatvernmnting st:etaces,MoD)3!4037--2002 City positive transmission effect elimination number pollution level code (ISO4406:1999, M0DG door!7446 flow 4 transmission system and components too (GB/T17446-1998, ISO5598:1985) (B:T17489 no style of pollution analysis 1: system operation road starting to take the lift GB door 174391993. Mountain JS04021:1992 JB factory 7353 hydraulic component cleaning method and piece stop parts cleanliness index 2 terms and definitions
GBT17446 and the following theories and definitions apply to this standard. 3.
nominalflow
the flow rate specified in the nominal flow document,
test flow test flow
The specified flow rate when testing the network gate
4Quantity, signature unit
Maximum, specification and unit are shown in Table 1.
5Special and basic salt effect
JE/T10374—2002
About public comfort barrier
Accumulation
Information inside diameter
Above. Form difference
Clear wave quality salt sound
Kinematic viscosity
Equivalent single elastic quantity
:M -Quality:
Quantity, symbol and unit
Pa(MFin)
Production: Appropriate and regular marking/nameplate shall be made in the production site and the marking shall be in accordance with the provisions of B5.
5.2 Basic parameters
The basic technical parameters of the flowmeter shall include: nominal force, nominal source capacity, nominal diameter, rated flow rate, performance specifications, etc.
B.1 General requirements
61! The following requirements should be met: 6B/T2346, 6.1.2 The installation surface should comply with the provisions of GB/T8101, and the installation surface should comply with the requirements of 68999. 1.3 The size of the oil connection port should comply with the provisions of GB/12878. 6.1.4 Other technical requirements should also comply with the provisions of GB35. 1.5 The product data should include the applicable conditions and environmental requirements of the product. 6.2 Performance requirements
The performance of the package:
H lift drag:
Pressure displacement:
Pressure loss:
Internal heat: || tt||Hot state research
Flow pattern:
Action reliability:
Adjustment angle:
Special note:
Tightness: Under rated working condition, there shall be no leakage at tightness and no tears at dynamic sealing: Pressure resistance: Each pressure-bearing oil valve shall be able to withstand 1.5% of the working pressure of the oil port, and there shall be no external disease and parts damage.
JB/T10374—2002
m) Durability: Under rated working condition, the relief valve shall be able to withstand the specified number of actions, and its parts shall not have abnormal wear and other forms of damage, and the decline of various performance indicators shall not exceed 10% of the specified value. 6.3 Assembly requirements
6.3.1 The overflow plate assembly shall comply with the provisions of GB/T7935. 6.3.2 The internal clearance requirements of the thief bottom shall comply with the provisions of B17858. 4 Appearance requirements
The appearance of the resource valve shall comply with the provisions of GB.T7935. 7 Performance test method
1 Test equipment
7.1.1 The factory test shall have a test bench that meets the test circuit shown in Figure A.1 in Appendix A. 7.1.2 The type test shall have a test bench that meets the test circuit shown in Figure A.2 in Appendix A. 1.3 Flow rate and usage of the source:
The source test is a virtual adjustment, which indicates the test volume of the test. Note that the source pressure should be able to exceed the nominal pressure of the valve by 20-30% for a short time. 7:4 It is allowed to add a flow control or flow control element in the given basic circuit to ensure the safe operation of the test system: it will not affect the test parts.
: .5 The inner diameter of the pipe and pipe joint to be tested should be consistent with the actual diameter of the test: 7.1.6 Pressure measurement point location:
7.1.6.1 The pressure measurement point should be located between the downstream of the real source (such as the test, Litou, etc.) and the upstream of the test. The distance from the source should not be less than 0 (the inner diameter of the test valve), and the distance from the test valve should not be 5. 7.1.6.2 The pressure seat should be located at a distance of not less than 1 meter in the test flow. 0, 7.1.6.3 When testing according to Class C accuracy: The position of the pressure measuring point is allowed to be inconsistent with the above requirements, but the corresponding correction value should be given. 7.1.7 Specifications:
7.1.7.1 The measuring diameter shall not be greater than [m and not less than 6m
7.1.7.2 The pressure measuring diameter shall be more than 2 times the diameter of the delivery hole. 7.1.7.3 The measuring line shall be perpendicular to the pipeline line, and the inner surface of the channel shall form a sharp edge with the pressure cavity at the corner. There shall be no hair. 7.1.7.4 The inner diameter of the connecting pipeline between the pressure point and the measuring instrument shall not be less than 3m. The connection point and the test meter shall be reversed, except for the connection to the air in the channel. 7.1.8 The temperature measuring point shall be set at no more than 15 upstream of the test point. 7.1.3 The oil sampling point shall be adjusted according to the current provisions of GBT17489. 7.2 Test conditions 72.1 Test medium 7.2.1.1 The test medium is general pressure oil: 72.1.2 Test medium temperature: unless otherwise specified, type tests shall be carried out at %=2~, factory tests shall be carried out at 50℃±4℃: 7.2.1.3 Viscosity of test medium: The kinematic viscosity at 40℃ is 42nml/g~74nmt/s (special requirements shall be specified separately) 7.2.1.4 Test medium, fineness: The solid particle contamination level of the test system oil shall not be higher than C and the level specified in 114039--2002: 9/16 7.2.2 Steady state condition Controlled parameters When the change range of the average displayed value of the controlled quantity meets the requirements of Table 2, it is a steady-state condition. The measurement of the test parameters should be recorded under steady-state conditions.
JB/T103742002
(%)
Measurement accuracy level 7.2.1
7.2.3 Instantaneous condition
2 The allowable change range of the average displayed value of the controlled quantity is generally the corresponding allowable change range of the average displayed value of the controlled quantity A
72.31 The apparent volume diagram of the tested quantity and the test part is guaranteed to be within the range of GUOMPa/s~BOOMPa/s.
: The change rate of the imported original force is estimated from the most complex operation state E and starts with pressure! The first 10%, the rise of 90% of the pressure change and the ratio of the compensation to the pressure change
2.3.2 The valve is connected to the tree of the flow network, and the pressure between the control console and the pressure can be determined by limiting the influence of the oil flow element compressibility. The gradient can be calculated. The calculated pressure gradient is the measured inlet pressure gradient! The conversion degree is calculated by the formula
:
The steady-state flow set by the test adjustment 4
-wave-breaking equal phosphorus body neck elastic model belt
dp-4Ka
A test drop in the drum: The oil circuit between the step loading valve hydraulic control check valve 8 or electromagnetic reversing valve 7-1) is connected to the machine 7.2.3.3 The action time of the step loading valve in the test circuit should not exceed 1% of the test response time: The longest time does not exceed 10ms. 7.2.4 Test flow
7.2.4.1 When the specified test rated flow is less than or equal to 7.*11/mi, the test flow is the specified flow. 7.2.4.2 For the specified test valve rated flow greater than 20Lmim, the test flow is allowed to be 200L/mi. The position must be evaluated under working conditions. The performance of the test valve is based on the requirements of the working condition. 7.2.4.3 The factory test is allowed to be carried out in sequence. The performance indicators should also be corrected. 7.2.5 Measurement accuracy level
The measurement accuracy level is divided into A, H, and three levels. If the type test fails, the lower level will be three or the test will be less than (level). The allowable system recognition of the flow measurement system for each level shall comply with the provisions of Table 3. 726 The solenoid of the test valve
Small factory test 5. The test method of this clause is as follows: the micro-test of the two working pressures of the iron is to be within the rated pressure of 85% of the rated pressure of the iron, and the test is carried out under the rated pressure of the magnetic field. The inductance is determined by the maximum commercial stability. The range of the seven-phase titanium energy positive voltage is reduced to the rated pressure of 859, and then the test valve is reversed for testing. The allowable system error of the measurement system is ±0.2MPa: (pressure 0.2M:) The allowable system error of the measurement system corresponding to the maximum accuracy level of each agent is B. 3 Test items and test methods 7.3.1 The test items and test methods are as specified in Table 4. Table 4 shows the "Test items and test methods" test items. Fertilizer pressure range trapped
strip discharge flushing mouth and injection box method wine,
test method
with the final speed limit of 2 times the speed limit of each pressure in the mouth stabilizer 1.5 disease of the sweep mouth the highest working main force, let to the rear pressure maintenance m
adjust the floating flow 2. The system force is collected by the test flash 4 pressure regulating range because of the upper position 115% did not start the pressure setting full bamboo use, and the good pass wide 4 gradual disk is the test nourishment, respectively run the following test to verify the low 4 two positive hand wheels to firm to firm, open to fully tighten to firm investment, suitable for the force number 3-: the current road force change range, the test cost less Ding San Da, verify the technology ratio 4 to the pressure range upper limit value, the pressure gauge 3-profit disk within 1m music add strength Bai
two test 4 to the pressure range with the same upper limit value, the force gauge 3-1 measured 1mn pressure tear point || tt||Internal leakage source disk
That is, the huge force
adjustment valve and the test valve are set, the transmission technology type two 4 to adjust the flow of the country! Limit, the relevant test should be measured by the test
adjustment along the 2, so that the system is damaged by the positive force drop to the breaking or valve return to the lower limit of the range, 3
make the test by the lubrication of the strict quantity, the electrical property can be measured, by the force table 3-1 and -2 Measure the pressure of the 4 grids under test, and its pressure drop is the dynamic pressure. Make the test question and the effect of the test fast, then turn on the two 4 electric speeds to be tested (new power, daily pressure gauge 3- and 5-2 to measure the pressure, the difference is the pressure difference. Note: let the pressure adjustment hand wheel be set to full price: make the flow rate test of the school type trial production, measure the pressure at both ends of the test rate, and the pressure gauge 3-1 and 3-2, the difference is the pressure loss. The best state!
Xie Lu Wan time 2. The letter system institute under the force for the war test version 1 model diagram value: 1 long safety Tao work history), after the ancient load time 4 self-talk please select "limit recovery, so that the flow through the valve 4 is +
test flow. Carry out the following tests respectively: ....
Liquor ancient signature emperor reading 2, low weak system through the whole reservoir ±, when the piece is slightly reduced to the corresponding technical test idle 4 closure rate under the certificate closure three, hours, through the side of the test discharge and, the river occupies the creation of Shen reading, from Germany without flow , so that the system gradually takes shape, when the rise should be in the test version 4 rise room rate "open pressure large, browse the volume back too wide full material leakage, adjust the labor flow idle 2. The system pressure is a wave-type pressure range limit store (safety can be || tt || enterprise to letter), can flow through the installation test 4 comparison data into a step-by-step verification, after the test will be the standard test 4 adjustment rate and pressure adjustment range because of the installation value, under the full conditions specified in 7.2.6, the electromagnetic reading power on (or power off:, internal force storage! Become close to the 4 welcome load (or building year" situation wet, 2 repeat the test Three three separation. Tightness
Change some of the village properties: adjust the throttle reading 6. He micro-test average 4 of the whole method to maintain 0.5MP (or according to product requirements: the back pressure value, adjust the test 1 of the adjustment hand wheel from full loose to full case, and from full cumulative full, double burst 3m, white low it does not need oil, dynamic seal seven: the valve under test 1 adjustment nail and electric aldehyde iron rod under the place 1 clean white Kai (allow the level of the person to feel the sample), the test items are all suitable in the middle, the self-offering does not steal oil understand the general name with: According to the test records, at each static place, a net water collection sheet should be attached. There should be no entry JB/103742002
micro-reading
only the target
disk and medical
, Ren Kuo Deng
blue sales source Pavilion,
! During the type test, the back pressure
full sealing test
is done in Xie Jiuyuan
B/103742002
7.3.2 Type test
Overflow test items and test methods shall be in accordance with the provisions of Table 5. Table 5 Type test items and test methods
Stability
: Lubrication
Noise-proof
Failure resistance
Test method
Press out! The test engineer shall select the test items specified in the test and test the specifications in the test. When the pressure is adjusted to the correct value, the auxiliary pressure virtual force is set to increase the value, and the force deviation value within the maximum point of the force connection value is measured at m. At the leakage test rate, the inlet pressure of the test network 4 will be gradually reduced to zero: during the period, several "measurement points" (the measurement points determined in the section should be described as follows, and the point measurement is averaged in the inner port, and the rise is drawn The leakage curve of the pressure test is larger than the pre-test point (see Figure A3). The leakage curve of the pressure test is larger than the pre-test point. ... The number of points of the question is enough to describe the whole curve), the loss ratio of the measured quantity is 4, and the loss ratio of the measured quantity is 4. When the flow is tested, the value will be adopted by the private 4 points. When the lower limit of the pressure flow is lower than 1MP, the flow plate is set at 1.M and the average step test point is formed. Then the unified development power delivery point is changed to The pressure and the corresponding flow through the two-way network are read out, and the characteristic line diagram A.6 is drawn! Super capital: the system soil is used to prove the 4th upper limit of the pressure business world (only the cooperation plan is used and the whole attempt is made to pass the 4th and the other end is: the test section is used to make the test example 4's signature 7 to ensure the three values of 0.5MP, according to the writing method, the three values of the pressure model are used first, and the lower limit of the internal 1 is used to make the internal 1, and the return is determined The measuring point (the measuring point specified in the consultation should be sufficient to draw the product after the drawing! , measure the force and the section ratio in the 4 sections, and draw the section ratio characteristic line (see Figure A.) The measuring point system method is shown in Figure A, the total method of the card: adjust the overflow two 1 hope system said the positive force is the tested continent run! Zhi use the appropriate 1 according to the resistance of the valve, the cost is nearly 4 single Xie ratio can be on the closing speed time 9, the variable wave ratio 1 hard wine through the installation test flash 4 is still the third test in the whole test process. In the plastic 2-1 shall not have any Shangke Tong! , divided into the next test,
the second order has changed when the mouth of the huge, the response sustainability test: the store moves the pressure reducing pump 1-2. Adjust the valve 2-2, so that the stop belt pressure drop soldiers control one-way still run time to reach 7.23.3 to release, when the electromagnetic actual response limit 1-24 original network time, through the example of the actual inspection of the force can be less than 20% of the pressure value, will be read 7-Change side position, control one-way empty beauty, 4 ways, remember the policy has not been system into recovery time
pressure wine rate (see Figure A)
finally built, unload and let the test: in the time, make the system comfortable oil circuit press direction, by remembering the design of the soft test 4 into the standard force delivery time, what time and pressure adjustment rate (see Figure A.10), adjust the reading 4 five adjustment standards use the above value: the general test solution 4 is to let more flow, The noise value of 6 evenly spaced positions is measured on an approximate ball track with a diameter of m, and the pressure regulating limit of the test valve is adjusted: the flow through the test valve 4 is the test flow, and the system is connected to the test valve 4 with a flow rate of (1/3~2/3) and the operation of the test valve 4 is recorded. After the number of actions specified in the durability label is reached, the limit of the pressure of the test valve 4 is checked. Note: The electrical relay is selected as the gate. B. Assembly and appearance inspection method The assembly and appearance inspection methods of the relief valve shall be in accordance with the provisions of Table 6. Table 6 Assembly and appearance inspection methods
Inspection rules
9.1 Inspection classification
Inspection items
Sunflower quality
Part C cleaning, gluing and shearing
Appearance quality
Product inspection is divided into factory inspection and type inspection. 3.1.1 Factory inspection
Inspection method
Daily inspection method,
return inspection report refers to the pre-inspection and method of products before delivery according to the provisions of JB/T103742002
7.3.1, the performance requirements shall meet the provisions of 6.2: the inspection method of installation and external parts shall meet the requirements of the third period of competition, and the quality shall meet the requirements of 63 period of competition
9. .2 Type inspection
Type inspection refers to the full-scale inspection of products according to the technical requirements of the standard, and the following requirements shall be carried out:
: new products are transferred from old products! 1. Production trial type identification: 2. Production method, material, and design change may affect product performance. 3. After the product has been discontinued for a long time, the production is resumed. 4. The inspection results are quite different from the first type inspection. 5. The performance requirements shall be in accordance with the provisions of 6.2. The inspection method of the appearance shall be in accordance with the provisions of 6.3 and 6.4. 6.2. The sampling plan for product quality inspection shall be in accordance with the provisions of GBT2828. 7.2.1. Factory inspection standard sample: AQL value of full quality level? 2.5. Customer type: positive inspection plan: 7: a total inspection level II: attached to the sample size of the test sample is 3/1000, he must not be a 922 type inspection type selection
) qualified quality level (AQL value): 2.5 [6.55: certification type: normal inspection plan: small: 512 sets,
, the value in the bracket is set to the appropriate month to the large test 9.2.3 internal cleanliness inspection plan: qualified original level AQL sales): 2.5
b) sample plan type: stop inspection sampling plan: e: inspection five water science: special inspection diameter water-S-2: 9.3 judgment rule
according to GTT2928 provisions. bzxZ.net
10 marking, packaging, transportation and storage
marking, packaging, transportation and storage according to 7935 provisions. Special requirements can be specified in accordance with the provisions of JB/T103742002. A.1 Test circuit A.1.1 Test circuit principle diagram A.1 Precision ...
Figure 4,1 Factory test circuit5MP three values, write down the method, learn the method of three life pressure model with medical value first, the lower limit of the internal 1 poly tube, the quantitative point of the ratio (the specified measurement time point should be sufficient to draw the product after the drawing! , measure the force and the proof of the 4 sections through the section, and draw the section ratio characteristic line. See Figure A. ) The measurement point system method is shown in Figure A, the total method of the card: adjust the overflow two 1 hope system said the positive force is the tested continent run! Zhi use the appropriate 1 according to the safety valve, the cost is nearly 4 single thank the ratio model, the closing speed time 9, the variable wave ratio 1 hard wine through the test flash 4 is still the three tests in the whole test process, the plastic 2-1 shall not have the Shangketong! , divided into the next test,
second order has changed north when the huge mouth, response sustainability test: the store moves the pressure reducing pump 1-2. Adjust the valve 2-2, so that the stop belt pressure drop soldiers control one-way still move time reaches 7.23.3 to release, when the electromagnetic actual response limit 1-24 original network time, through the example of the actual inspection of the force can be less than 20% of the pressure value, will read 7-change side position, will control one-way out of the air, 4, record the policy has not been restored when the system
pressure rate (see Figure A)
finally built, unloading and other performance tests: in the time system to relax the oil circuit, by the record record Show the delivery time, action time and pressure adjustment rate of the test valve 4 (see Figure A.10), adjust the test valve 4 using the above-mentioned adjustment value: let the flow through the test frequency 4 be the test flow, use the approximate ball track with a diameter of m from the test valve 4, measure the noise values at 6 evenly spaced positions, adjust the test valve 4 to the same pressure adjustment limit value: make the flow rate through the test frequency 4 the test flow, and continuously change the system through the parking path with (1/3~2/3) of the river, record the test valve 4's operation effect, and after the number of actions specified in the durability label is reached, check the pressure limit of the test valve 4. Note: For flash, the electrical inspection procedure shall be selected as the door. The electrical relay shall be sent to the network. B. Assembly and appearance inspection method The assembly and appearance inspection methods of the relief valve shall be in accordance with the provisions of Table 6. Table 6 Assembly and appearance inspection method Inspection rules 9.1 Inspection classification Inspection items Part C Clearance and shearing External quality Product inspection is divided into factory inspection and type inspection. 3.1.1 Factory inspection
Inspection method
Daily inspection method,
return inspection report refers to the pre-inspection and method of products before delivery according to the provisions of JB/T103742002
7.3.1, the performance requirements shall meet the provisions of 6.2: the inspection method of installation and external parts shall meet the requirements of the third period of competition, and the quality shall meet the requirements of 63 period of competition
9. .2 Type inspection
Type inspection refers to the full-scale inspection of products according to the technical requirements of the standard, and the following requirements shall be carried out:
: new products are transferred from old products! 1. Production trial type identification: 2. Production method, material, and design change may affect product performance. 3. After the product has been discontinued for a long time, the production is resumed. 4. The inspection results are quite different from the first type inspection. 5. The performance requirements shall be in accordance with the provisions of 6.2. The inspection method of the appearance shall be in accordance with the provisions of 6.3 and 6.4. 6.2. The sampling plan for product quality inspection shall be in accordance with the provisions of GBT2828. 7.2.1. Factory inspection standard sample: AQL value of full quality level? 2.5. Customer type: positive inspection plan: 7: a total inspection level II: attached to the sample size of the test sample is 3/1000, he must not be a 922 type inspection type selection
) qualified quality level (AQL value): 2.5 [6.55: certification type: normal inspection plan: small: 512 sets,
, the value in the bracket is set to the appropriate month to the large test 9.2.3 internal cleanliness inspection plan: qualified original level AQL sales): 2.5
b) sample plan type: stop inspection sampling plan: e: inspection five water science: special inspection diameter water-S-2: 9.3 judgment rule
according to GTT2928 provisions.
10 marking, packaging, transportation and storage
marking, packaging, transportation and storage according to 7935 provisions. Special requirements can be specified in accordance with the provisions of JB/T103742002. A.1 Test circuit A.1.1 Test circuit principle diagram A.1 Precision ...
Figure 4,1 Factory test circuit5MP three values, write down the method, learn the method of three life pressure model with medical value first, the lower limit of the internal 1 poly tube, the quantitative point of the ratio (the specified measurement time point should be sufficient to draw the product after the drawing! , measure the force and the proof of the 4 sections through the section, and draw the section ratio characteristic line. See Figure A. ) The measurement point system method is shown in Figure A, the total method of the card: adjust the overflow two 1 hope system said the positive force is the tested continent run! Zhi use the appropriate 1 according to the safety valve, the cost is nearly 4 single thank the ratio model, the closing speed time 9, the variable wave ratio 1 hard wine through the test flash 4 is still the three tests in the whole test process, the plastic 2-1 shall not have the Shangketong! , divided into the next test,
second order has changed north when the huge mouth, response sustainability test: the store moves the pressure reducing pump 1-2. Adjust the valve 2-2, so that the stop belt pressure drop soldiers control one-way still move time reaches 7.23.3 to release, when the electromagnetic actual response limit 1-24 original network time, through the example of the actual inspection of the force can be less than 20% of the pressure value, will read 7-change side position, will control one-way out of the air, 4, record the policy has not been restored when the system
pressure rate (see Figure A)
finally built, unloading and other performance tests: in the time system to relax the oil circuit, by the record record Show the delivery time, action time and pressure adjustment rate of the test valve 4 (see Figure A.10), adjust the test valve 4 using the above-mentioned adjustment value: let the flow through the test frequency 4 be the test flow, use the approximate ball track with a diameter of m from the test valve 4, measure the noise values at 6 evenly spaced positions, adjust the test valve 4 to the same pressure adjustment limit value: make the flow rate through the test frequency 4 the test flow, and continuously change the system through the parking path with (1/3~2/3) of the river, record the test valve 4's operation effect, and after the number of actions specified in the durability label is reached, check the pressure limit of the test valve 4. Note: For flash, the electrical inspection procedure shall be selected as the door. The electrical relay shall be sent to the network. B. Assembly and appearance inspection method The assembly and appearance inspection methods of the relief valve shall be in accordance with the provisions of Table 6. Table 6 Assembly and appearance inspection method Inspection rules 9.1 Inspection classification Inspection items Part C Clearance and shearing External quality Product inspection is divided into factory inspection and type inspection. 3.1.1 Factory inspection
Inspection method
Daily inspection method,
return inspection report refers to the pre-inspection and method of products before delivery according to the provisions of JB/T103742002
7.3.1, the performance requirements shall meet the provisions of 6.2: the inspection method of installation and external parts shall meet the requirements of the third period of competition, and the quality shall meet the requirements of 63 period of competition
9. .2 Type inspection
Type inspection refers to the full-scale inspection of products according to the technical requirements of the standard, and the following requirements shall be carried out:
: new products are transferred from old products! 1. Production trial type identification: 2. Production method, material, and design change may affect product performance. 3. After the product has been discontinued for a long time, the production is resumed. 4. The inspection results are quite different from the first type inspection. 5. The performance requirements shall be in accordance with the provisions of 6.2. The inspection method of the appearance shall be in accordance with the provisions of 6.3 and 6.4. 6.2. The sampling plan for product quality inspection shall be in accordance with the provisions of GBT2828. 7.2.1. Factory inspection standard sample: AQL value of full quality level? 2.5. Customer type: positive inspection plan: 7: a total inspection level II: attached to the sample size of the test sample is 3/1000, he must not be a 922 type inspection type selection
) qualified quality level (AQL value): 2.5 [6.55: certification type: normal inspection plan: small: 512 sets,
, the value in the bracket is set to the appropriate month to the large test 9.2.3 internal cleanliness inspection plan: qualified original level AQL sales): 2.5
b) sample plan type: stop inspection sampling plan: e: inspection five water science: special inspection diameter water-S-2: 9.3 judgment rule
according to GTT2928 provisions.
10 marking, packaging, transportation and storage
marking, packaging, transportation and storage according to 7935 provisions. Special requirements can be specified in accordance with the provisions of JB/T103742002. A.1 Test circuit A.1.1 Test circuit principle diagram A.1 Precision ...
Figure 4,1 Factory test circuit1h factory inspection standard sample
: full quality level AQL value? : 2.5:! Customer type: positive belt inspection sample plan: : pull check 7: a stock inspection level II: attached biological test sample size is 3/1000, he shall not be one internal 922 type inspection selection
) qualified quality level (AQL value): 2.5 [6.55: certification type: normal inspection batch sample plan: : small: 512 sets,
, the value in brackets is set to the appropriate month to large test 9.2.3 internal cleanliness inspection push sample
: qualified original its level AQL (sales): 2.5
b) own sample plan type: stop width inspection sampling plan: e: inspection five water science: special inspection diameter water-S-2: 9.3 judgment rule
according to GTT2928 provisions.
10 Marking, packaging, transportation and storage
Marking, packaging, transportation and storage shall comply with the provisions of 7935. Special requirements may be specified in the sub-sections of JB/T10374-2002
A.1 Test circuit
A.1.1! The principle diagram of the test circuit is shown in Figure A.1. The principle diagram of the test circuit is shown in Figure A.2 ...1h factory inspection standard sample
: full quality level AQL value? : 2.5:! Customer type: positive belt inspection sample plan: : pull check 7: a stock inspection level II: attached biological test sample size is 3/1000, he shall not be one internal 922 type inspection selection
) qualified quality level (AQL value): 2.5 [6.55: certification type: normal inspection batch sample plan: : small: 512 sets,
, the value in brackets is set to the appropriate month to large test 9.2.3 internal cleanliness inspection push sample
: qualified original its level AQL (sales): 2.5
b) own sample plan type: stop width inspection sampling plan: e: inspection five water science: special inspection diameter water-S-2: 9.3 judgment rule
according to GTT2928 provisions.
10 Marking, packaging, transportation and storage
Marking, packaging, transportation and storage shall comply with the provisions of 7935. Special requirements may be specified in the sub-sections of JB/T10374-2002
A.1 Test circuit
A.1.1! The principle diagram of the test circuit is shown in Figure A.1. The principle diagram of the test circuit is shown in Figure A.2 ...
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