JB/T 9840.3-1998 This standard is a revision of ZB T66 005-89 "Technical requirements for air brake system distribution valves for tractor trailers". This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements for air brake system distribution valves for tractor trailers. This standard applies to air brake system distribution valves for tractor trailers. JB/T 9840.3-1998 Technical requirements for air brake system distribution valves for tractor trailers JB/T9840.3-1998 Standard download decompression password: www.bzxz.net

ICS 65.060.14
Machinery Industry Standard of the People's Republic of China
JB/T9840.3-1998
Distributor alve for pneumatic braking systems of tractor trailers
Technical requirements
Distributor alve for pneumatic braking systems of tractor trailers-Technical requirements1998-09-30 Issued
National Bureau of Machinery Industry
Implementation on 1998-12-01
JB.T9840.3—1998
Technical requirements This standard is a revision of ZBT6600539 Distributor alve for pneumatic braking systems of tractor trailers compared with 2BT66005-89. This standard has cancelled the degree of maintenance: This standard shall be effective from the date of implementation and shall replace ZBT6605-89 at the same time. The standard is proposed and managed by the National Technical Committee for Standardization of Tractors. The drafting unit of this standard is Luoyang Tractor Research Institute. The main contributors are: Jia Xiang, Zheng Suomin. 1 Scope
Machinery Industry Standard of the People's Republic of China
Distribution valve of air brake system for tractor trailer
Technical conditions
Digtrihutor yalve fur pncugatic braking system af tractor trailer-Technicat reqairement JIB/T 9-40.3—1998
2DT66005-89
This standard specifies the technical requirements, test methods, inspection regulations, marking, packaging, transportation and storage of distribution valve of air brake system for tractor trailer.
This standard is applicable to distribution valve of air brake system for tractor trailer. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is issued, the terms shown are valid. All standards will be revised, and parties using this standard should explore the possibility of tracking the latest version by using the following engraved mark. 0E2828-87
Batch inspection counting sample shooting procedure and dynamic sample table (applicable to the inspection of continuous batches) GB: TJ33B4-92 General technical conditions for electromechanical production and marketing packaging Clothing Lin exchange machine and equipment filter pressure technology killing parts January T5673-91
JT3117.2-85 Injection vehicle single pipeline air brake emergency relay valve bench test piece method Technical requirements
3.1 The dispensing valve shall be manufactured according to the product samples and technical documents approved by the prescribed procedures, and the dispensing table shall be smooth and flat, without burrs, burrs, metal layer and oxide layer shall not fall off and rust, and the rolling surface shall comply with the provisions of [B/5673 TQ-2-2. 3.3 The operating temperature of the distribution chamber is between -30-70°C. 3.4 The nominal pressure of the distribution chamber is 630 kPa. 3.5 Energy
3. 5.1 Static characteristics
3.5.1.1 The starting force is not greater than 64 kPa and not less than 41 kPa. 3.5.1.2 The minimum balance force is not less than 98 kPa
3.5.1.3 The maximum balance pressure is equal to the nominal pressure of the gas storage chamber. 3.5.1.4 Within the range of pressure from the minimum balance force to the embedded balance pressure, the gas supplied to the brake chamber and the air pressure of the trailer main pipeline are kept in sync.
3.5.2 Working performance
3.5.1.1 Full brake working performance
When the brake chamber force reaches the nominal force, the energy level at the air inlet of the distribution chamber should not be greater than 10 kPa Approved by the National Machinery Industry Bureau on September 30, 1998 and implemented on December 1, 1998
3.5.2.2 Release agent working performance
JB:T9840.3-1998
When the pressure at the air inlet of the distribution valve reaches the working pressure, the operating pressure of the brake air chamber should not exceed 10kPs3.5.3 System flexibility
When the trailer air tank is just rising to supply air to the brake air chamber, the pressure drop at the air inlet of the distribution network should be between 60-80ka. 354 Air pressure difference
The pressure at the air inlet of the trailer air storage and the distribution network is not more than 20kPa, 3. 5.5 Sealing performance
3, 5.1 When the distribution valve is connected to a 1L gas storage tank and is in a fully released state, the pressure drop within 5 minutes under nominal pressure shall not exceed 15 kPae
3.5.5.2 When the distribution valve is connected to a 1L gas storage tank and is in a fully released state, the pressure drop within 5 minutes under nominal pressure shall not exceed 30 kPae
3.5. 6 Pressure resistance
After the pressure resistance test of the distribution valve at 125% of the nominal pressure for 30 cycles, no parts shall be damaged, and the sealing shall comply with the provisions of 3.5.5.
3.5.7 Durability
3.5.7.1 The distribution valve shall undergo a durability test on the bench for 15×10* cycles of operation: during the test, a sealing inspection shall be carried out every 5×10 cycles of operation.
3.5.7.1 After the durability test of the distribution valve is completed, the pressure drop of the sealing test shall not be less than 2 times the value specified in 3.5.5. 3. Stone protection Use period bzxZ.net
As long as the user follows the installation, maintenance and use and testing specified in the instruction manual of the tractor trailer air brake device, the warranty period is the same as the annual engine warranty period.
During the warranty period, if the device fails or cannot be used normally due to the manufacturer's fault, the manufacturer shall be responsible for repair, replacement and refund.
4 Test method
The test method shall refer to the provisions of 1T3117.2. 5 Inspection rules
5.1 Factory test
Each device shall be inspected and tested by the quality inspection department of the manufacturer before it can be shipped. The inspection items for shipment shall be in accordance with the regulations of the table. 5.2 Type inspection
5.2.1 Inspection items
Static characteristics, working performance, braking flexibility, inflation pressure difference, unsealing, standing pressure and durability, 5.2.2 Batch rules and sampling plan
a) The batches should be inspected in batches. Each inspection batch can be composed of a production batch that has passed the previous inspection, or it can be composed of the next production batch. If the number of products in the production batch is large, each batch can be reduced to an inspection batch: 6) According to the current situation of import and export, the standard adopts a positive sampling plan once, and stipulates that the special grid level S-1. The sample size is 2, and the qualified quality level is half AQL =6.5, the sampling force method agreed by both parties can be used for arch inspection-2
5.2.3 Judgment rules
Question pressure
Moving sensitivity
JB/T9840.3—1998
7. Brake parts compensation
Release brake L standard performance
Full state sealing
Release state tightness
Full brush moving state sealing
Except brake recovery state tightness
a) For the durability test, the test results shall comply with the provisions of 3.5.7. If the durability test is not qualified, the product shall be judged as unqualified. Other test items and cumulative heat extraction performance plan shall be tested. If the qualified quality level is reached, the batch of products shall be unqualified: If two consecutive inspections are unqualified, the original samples shall be doubled for inspection. After passing the inspection, the regular inspection shall be resumed. 6 Marking, packaging, transportation and storage
6.1 The basic content of product marking includes:
d) Name and address of the manufacturer:
b) Product name;
c) Product model or mark:
d) Manufacturing date (or number) or production abbreviation 6 The packaging of the distribution valve shall comply with the provisions of the relevant regulations. The distribution valve shall at least provide the following technical documents:
Product instruction manual:
i) Product certificate:
Warranty certificate;
Packing list
6.1 It should be ensured that the distribution valve will not be damaged or mishandled during normal transportation. 6.4 The distribution valve should be stored in a well-ventilated and well-ventilated warehouse. It should be ensured that the product will not rust due to poor packaging within 1 year from the date of delivery. Special requirements shall be implemented by both parties.
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