JB/T 6634-1993 Orifice plate for mechanical sealing system

This standard specifies the type and installation dimensions of orifice plates for mechanical seal systems, performance requirements, technical requirements for main parts, installation requirements, performance testing and marking, packaging, etc. This standard applies to orifice plates for sealing systems. The basic working parameters are medium, water, oil, and chemical liquids; a small amount of solid impurities are allowed: pressure 0.3~6.3MPa; temperature -20~200℃; flow rate 3~30L/min. JB/T 6634-1993 Orifice plate for mechanical sealing system JB/T6634-1993 Standard download and decompression password: www.bzxz.net

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Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-01-01
Machinery Industry Standard of the People's Republic of China
Orifice plate for mechanical sealing system
1 Subject content and scope of application
JB/T663493
This standard specifies the type, main dimensions, commonly used materials, and Hydraulic performance, main technical requirements, plate flow rate, inspection methods, packaging, transportation and storage, etc. This standard applies to orifice plates used in machine core sealing systems. The basic working parameters are medium, water, oil, chemical liquid, and a small amount of solid impurities are allowed: pressure 0~6.3MPa; temperature -20~+200C, flow 3~30L/min, 2 reference standard
GB3733. 1
GB 3734.1
ZBJ22022
JB/JQ9012
3 type
Cut type end straight pipe joint
Cut type maintenance Threaded straight pipe joint
Filled polytetrafluoroethylene and polytetrafluoroethylene roughening for machine sealing Technical conditions Silicon nitride sealing ring for mechanical seal Technical conditions 3.1 The type is divided into round type, cylindrical type, and cored There are three types of cylindrical types. Their codes are represented by MK1, MK1 and MKI respectively (see Table 1). 3.2 Model representation method
Orifice plate interface thread type and size (see Table 1) Bore diameter, expressed in numbers, unit: mm (see Table 1) Pressure level, 10MPa||tt ||Structure type code, there are 1, I, type (see Table 1) MK means sealed orifice plate
Model example:
Type 1 orifice plate, the pressure is 6.3MPa, the diameter specification is 2.5 mm, sealed orifice plate with ZG1/2 interface thread: MK163-2.5/ZG1/2
4Main dimensions and commonly used materials
4.1Main dimensions are shown in Table 1.
4.2 Commonly used materials are shown in Table 2.
Approved by the Ministry of Machinery Industry on 1993-05-07
Implemented on 1994-01-01
JB/T 6634-93
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table
XW||tt| |Type
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Degree
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orifice flow
pieces
Qian ring compression mother| |tt||core
orifice plate flow base should comply with the requirements of Table 3 .
m liquid column
45|| tt||50
m liquid column
2|| tt||4
0.41||tt| |0. 45
1. 05|| tt||1. 09
0. 79||tt| |0. 84
1.71|| tt||1.85
2.45||tt| |4
JB/T6634—93
Commonly used materials for sealing orifice plates
Table 2
Table 3 Plate flow rate
d.||tt| |1.8
2.21||tt| |2. $3
3. 68|| tt||3.86
Continued Table 3
2. 94|| tt||4.16
Q||tt ||2. 2
2. 44| |tt||2. 67
4. 22||tt ||4. 45
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1Cr18Ni9Ti
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4. 06||h||4.45||h||4. 74
7. 21||h||7.56||h||7. 89
5.23| |tt||5.85
6. 18||h||8.75||h||10. 71
55|| tt||60
下载手机设计
7. 27||h||7.96||h||8.40||h||9.39||h||10.28||h||10. 95
7.21| |tt||8.06
13.95||tt ||14.71
JB/T 663493
绝表3
12.58|| tt||13.79
11. 26||h||12.59||h||13.79||h||14.53||h||16.25||h||17.80||h||18.95||h||20.55||h||21.80| |tt||22.98
28.11| |tt||29.36
板电视粉维身R，value is 6.3μm。 The technology requirements of nitrogen oxide silicon core ring are in line with the relevant provisions in JB/JQ9012. ||电影面两式设计安全。
determined by theoretical calculation
orifice plate flow Q is determined according to formula (1):
Q——Flow rate, L/min||tt| |In the formula,
d. Orifice plate hole diameter.mm,
H—orifice plate pressure head drop, m wave column:
C. —Orifice flow coefficient.
7.2 Simplified calculation to determine
When selecting the orifice plate flow coefficient C. =0.17, the orifice flow Q can be determined according to the following simplified formula: Q=0.13djHVz
The meaning of the symbols in the formula is the same as above.
Example: It is known that d2.5mm, H=65m liquid column , ask for Q. 4
Substituting the above data into the formula, we get
7.3 , Orifice plate specifications can be selected by referring to Table 3
JB/T6634-93
For the pressure drop at both ends, find the corresponding flow value in Table 3. 8 Inspection methods
8.1 The batch output is not more than 10 pieces and should be tested one by one. When the output of each batch is more than 10 pieces, 10% of the total amount will be randomly inspected, but not less than 10 pieces.
8.2 The hydraulic performance test of the sealed orifice plate is carried out on a special test bench. The inlet and outlet pressure of the orifice plate is measured with a Class 1 industrial standard pressure gauge, and the flow rate is measured with a Class 1 industrial rotor flowmeter
8.3 The sealed orifice plate should be subjected to a hydraulic test. The test pressure is equal to 1.25 times the working pressure and lasts for 15 minutes. No leakage or damage. 9 Packaging, transportation and storage
9.1 Products should be cleaned and rust-proofed before packaging. 9.2 Packaging should be able to prevent product damage, rust and loss during transportation and storage. 9.3 The product certificate should be included in the packaging box. The content of the certificate includes: orifice plate model, specifications, factory name, technical inspection mark, and date. 9.4
The packaging box should be strong and reliable, and a packing list should be attached inside the box. Additional notes:
This standard is proposed and administered by the Hefei Machinery Research Institute of the Ministry of Machinery and Quilt Industry. This standard is drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Liu Yueying, Zhang Yuhong, and Shi Fujiang. 5
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