From the date of implementation of this standard, the original NJ 145-85 "Technical Requirements for Milk Separators" will be invalidated. This standard specifies the technical requirements, inspection rules, marking, packaging, transportation and storage requirements for milk separators. This standard applies to disc centrifugal milk separators that separate milk into milk fat and skim milk. JB/T 7767.1-1995 Technical Requirements for Milk Separators JB/T7767.1-1995 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T7767.1-1995
Milk separator
, technical conditions
Published on June 16, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1996
Machinery Industry Standard of the People's Republic of China
Technical conditions
Milk separator:
1 Subject content and scope of application
JB/T 7767.11995
This standard specifies the technical requirements, inspection rules, marking, packaging, transportation and storage requirements for milk separators. This standard applies to disc centrifugal milk separators (hereinafter referred to as separators) that separate milk into milk fat and skim milk. Reference standards
GB7682
GB9239
Types and basic parameters of milk separators
Determination of allowable imbalance of rigid rotor balance quality Milk separator test method
JB/T7767.2
3 Types and basic parameters of separators
Types and basic parameters of separators shall comply with the provisions of GB7682. 4 Technical requirements
General technical requirements
4.1.1 The separator shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. All parts in contact with milk must have non-toxic, odorless, rust-proof and other properties. 4.1.2
The non-working outer surfaces of the separator that are not in direct contact with milk (except for the use of anti-corrosion materials) shall be painted. The paint film surface shall be flat, 4.1.3
smooth and bright in color. The paint layer should be uniform and firm. There should be no defects such as missing coating area, different colors, sagging, bubbling, wrinkling, etc., and it should have a certain anti-corrosion ability.
The non-processed inner surface of the separator that is not in direct contact with milk (except for the use of anti-corrosion materials) should be painted with anti-rust paint. 4.1.5
Attention should be paid to insulation and waterproofing when arranging the wires.
The fixing of the separator base and the bottom plate should be reliable, safe, and level (excluding hand-cranked separators with a production rate of 50,100L/h). The structure of the separation bowl and the milk delivery trough of the centrifugal slag separator should be able to be circulated and cleaned without disassembly. There should be no impact during centrifugal slag discharge. There must be mutual positioning measures between the parts of the separation bowl with a production rate greater than 50L/h to ensure the assembly quality. The transmission mechanism should be installed in the base or in a special protective cover. The automatic slag discharge separator should ensure the sealing of the separation bowl under non-slag discharge conditions. 4.2 Main technical performance indicators
4.2.1 The acidity of the fresh milk used in the test shall not be higher than 20\T, the fat content shall not be greater than 3.5%, and the temperature shall be heated to 40±5℃. When the separator is at rated speed, its main technical performance indicators shall comply with the provisions of Table 1. Approved by the Ministry of Machinery Industry on June 16, 1995
Implementation on July 1, 1996
Skimmed milk fat content%
Adjustment range of milk fat to skimmed milk volume ratioSound
dB (A)
Amplitude (separation bowl chamber)
JB/T7767.1-1995
1 : 3~1 : 12
Mechanical type ≤85,
Hand-cranked type ≤70
50 L/h
100~1000 L/h
2000~5000 L/h
Above 5000L/h
The average working time before the first failure shall comply with the provisions of Table 2. Table 2
Productivity
50~100
500~1000
2000~5000
Above 5000
Technical requirements for major components
4.3.1 Separation bowl
Average working time before first failure
≥450
≥1000
Important parts such as the base and cover of the separation bowl shall be manufactured by forging, stamping or spinning. Its impact toughness shall not be less than 40Nm/cm2, and there shall be no cracks.
Important parts such as the separation bowl cover and
base shall not produce residual deformation when subjected to 120% of the rated load. The sealing ring of the separation bowl should be made of oil-resistant food-grade rubber with the following characteristics: heat resistance of not less than 80℃, non-toxic, no abnormal odor; no decomposition when heated to 80℃ in 2% nitric acid or sodium hydroxide solution. The surface of the casting should be smooth and free of defects such as cracks, sand holes, pores, incomplete pouring, sand sticking, etc. that affect the strength or appearance quality. Stamping parts should not have defects such as cracks, burrs, sharp edges and obvious wrinkles. Assembly technical requirements
All parts must be inspected and qualified, purchased parts and cooperative parts must have certificates of conformity, and can only be assembled after passing random inspections. The gap between each set of separation plates of the separation bowl should be uniform, and their edges should not contact each other. Tighten the separation bowl nut, and no leakage should be allowed within 5 minutes after water injection.
The comprehensive deviation of the stiffness of each set of shockproof springs of the separator shall not exceed 5%. 4.4.3
After the separator with a production rate greater than 100L/h is assembled, the separator bowl shall be subjected to a no-load dynamic balance test, and its balance accuracy shall not be lower than the G6.3 level specified in GB9239.
The transmission mechanism of the separator shall ensure that the separator bowl operates freely and accelerates smoothly. When the production rate is greater than 2000L/h, a braking mechanism shall be provided. Test method
All requirements of this standard shall be tested in accordance with JB/T7767.2. 2
Inspection rules
6.1 Factory inspection
JB/T7767.11995
Each separator shall be inspected and qualified by the inspection department of the manufacturer, and can only be shipped after the certificate of conformity is issued. The items of factory inspection shall include the contents of Articles 4.4.1, 4.4.2, 4.4.4 and 4.4.5 of this standard. Each item in the factory inspection should be qualified. If there are unqualified items, they can be repaired. If they are still unqualified, they are not allowed to leave the factory. Type inspection
Type inspection should generally be carried out in one of the following situations: trial production and identification of new products or old products transferred to the factory for production; during normal production, type inspection should be carried out at least once every three years; after normal production, if there are major changes in structure, materials, and processes that may affect product performance; when the product is resumed after three years of suspension; when the national quality supervision agency proposes a requirement for type inspection. The items of type inspection should include the contents of Articles 4.1 to 4.4 of this standard. Sampling and batching
When the production rate is 50~200L/h, the batch N=16~25 units; when the production rate is 500L/h and above, N=2~8 units. A normal inspection sampling plan is adopted. The classification of unqualified products is shown in Table 3, and the sampling inspection plan is shown in Table 4. When the user has special requirements, the sampling inspection plan shall be agreed upon by the supply and demand parties.
Name of unqualified items
Fat content of skimmed milk exceeds tolerance
Dynamic balance of separation bowl exceeds tolerance
Poor sealing of separation bowl
Qualified rate of main items of main parts and components is less than 85%Insufficient volume ratio of milk fat to skimmed milk
Insufficient average working time before first failure
Amplitude exceeds tolerance
Noise exceeds tolerance
Comprehensive deviation of spring stiffness exceeds
Unqualified strength test
Insufficient productivity
Impact phenomenon occurs during high-center slag discharge
Poor circulation cleaning of centrifugal slag discharge separator Unstable operation of separator
Uneven gap between edges of separation plates
Overweight of the whole machine
Milk basin leakage exceeds toleranceWww.bzxZ.net
Poor sealing of transmission box
Safety device does not meet the requirements
JB/T 7767.11995
Continued Table 3
Poor anti-rust quality
Poor quality of stamping parts
Poor casting quality
Poor painting quality
Integrity of the whole machine does not meet the requirements
Insufficient mutual positioning measures for the parts of the separation bowl
Packaging and marking do not meet the requirements
Note: 1) This is the inspection item for models with a production rate of 500L/h and above and with automatic centrifugal slag discharge separators. Table 4
Classification of unqualified items
Number of samples
Number of items
Inspection level
Judgment rules
Judgment rules
50-200 L/h
500 L/h and above
50~200 L/h
500 L/h Above
When the number of unqualified items in the inspected category is less than or equal to the qualified judgment number Ac, the category is judged as qualified. When the number of unqualified items in the inspected category is less than or equal to the unqualified judgment number Re, the category is judged as unqualified c
When the inspected product is judged as qualified in categories A, B, and
C, the entire batch of products is judged as qualified, otherwise it is judged as unqualified. Marking,
Packaging, transportation and storage
Except for the separator, seal and positioning pin, the remaining parts of the separator bowl with a diameter greater than 100mm should be numbered. For separators driven by motors, the direction of motor rotation must be clearly indicated. Fix the sign in a conspicuous place on the base of the separator. The label should indicate the following: a.
Product name;
Manufacturer name;
Product model and trademark;
Speed ​​of separation bowl;
Matching power;
Factory date or factory number.
The separator is packed in a single box. When packing, the separation bowl must be removed from the main shaft, and all parts should be fixed in the packing box. The accompanying technical documents must be complete and packed in a moisture-proof and oil-proof bag. The technical documents include: 4
Instruction manual;
b. Packing list;
Product inspection certificate.
The accompanying accessories should be complete. The accompanying accessories should include: 7.6
Anti-vibration spring;
b. Separation bowl sealing ring;
Special tools;
d. Spare separation sheet.
JB/T7767.11995
The above accessories should be protected against corrosion for not less than 1 year. 7.7
The packaging box should meet the requirements of transportation and storage. 7.8
The packed separator should be stored in a dry and ventilated room. 8
Quality assurance period
If the user complies with the installation, commissioning and use regulations of the product, the manufacturer shall repair or replace the product for the user free of charge within 18 months from the date of delivery if the product cannot work normally due to poor manufacturing quality. Additional remarks:
This standard is proposed and managed by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Hai Yurong.
From the date of implementation of this standard, the original NJ145-85 "Technical Conditions for Milk Separators" shall be invalidated.
People's Republic of China
Mechanical Industry Standard
Technical Conditions for Milk Separator
JB/T 7767,11995
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Format 880×1230
First edition in May 1996
Printing 1-500
Postal Code 100044)
Words 10.000
Sheet 1/2
First printing in May 1996
Price 5.00 yuan
95-109
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_9 /
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