HG/T 2269-1992 Technical requirements for mechanical seals for kettles
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T 2269—92
Technical Specifications for Mechanical Seals for Kettles
1992-01-08 Issued
Ministry of Chemical Industry of the People's Republic of China
1992-07-01 Implementation
WW.bzsosO.cOm Chemical Industry Standard of the People's Republic of China
Technical Specifications for Mechanical Seals for Kettles
1 Subject Content and Scope of Application
HG/T 2269 - 92
This standard specifies the technical requirements, testing, installation and use requirements of materials and main parts of mechanical seals for swivels. This standard is applicable to the stirring shafts of carbon steel and stainless steel reaction swivels and similar vertical stirring shaft mechanical seals: its working parameters: the medium pressure of the sealing chamber is 1.33×10-5MPa (absolute pressure) ~ 2.5MPa (gauge pressure); the medium temperature in the sealing chamber is 0~80℃; the outer diameter of the stirring shaft (or sleeve) is 30~130mm; the speed is not more than 500r/min; the medium is Strong oxidizing acid, various fluids other than high concentration alkali,
2 Reference standards
GB1184 Shape and position tolerances Provisions for unindicated tolerances GB1239.2, Technical conditions for cold-rolled cylindrical helical compression springs GB1804 Tolerances and fits Limit deviations of dimensions without unindicated tolerances GB3452.1 Type 0 rubber seals for hydraulic and pneumatic use Dimension series and tolerances HG2098 Kettle mechanical seal series and main parameters HG2099 Kettle mechanical seal test specifications
HG／T21 22 Mechanical seal auxiliary device for keel HG2264 Type, main dimensions and marking of mechanical seal for keel 3 Type, dimension and marking
Type, dimension and identification mark of mechanical seal for keel shall comply with the provisions of HG2264. 4 Technical requirements
4.1 Technical requirements for materials
4.1.1 Type of materials for mechanical seal for keel shall comply with the provisions of HG2264. 4.1.2 Material performance and various technical requirements for main parts of mechanical seal for keel shall comply with relevant standards. 4.2 Main parts Technical requirements for partsbzxZ.net
4.2.1 The flatness of the sealing end face shall not exceed 0.0009mm, the roughness Ra of the hard material sealing end face shall not exceed 0.2μm, and the roughness Ra of the soft material sealing end face shall not exceed 0.4uTn.4.2.2 The parallelism of the end faces of the stationary ring and the rotating ring sealing end faces in contact with the auxiliary sealing ring shall comply with the 7th grade tolerance of GB1184. 4.2.3 The surface roughness Ra of the contact parts between the stationary ring and the rotating ring and the auxiliary sealing ring shall not exceed 3.2uim, and the outer or inner hole size tolerance shall be h8 or H8.
4.2.4 The verticality of the outer circle of the stationary ring sealing end face in contact with the stationary ring auxiliary sealing ring, and the verticality of the rotating ring sealing end face in contact with the inner hole of the rotating ring auxiliary sealing ring shall comply with the 7th grade tolerance of GB1184. 4.2.5 The limit tolerance of the uninjected tolerance size of the parts shall be in accordance with the IT12 tolerance of GB1804. 4.2.6 Graphite rings, filled tetrafluoroethylene rings and assembled rotating rings and stationary rings shall be subjected to hydraulic pressure test. The test pressure shall be 1.5 times of the design pressure (approved by the Ministry of Chemical Industry of the People's Republic of China on January 8, 1992 and implemented on July 1, 1992) and shall last for 10 minutes. There shall be no leakage. HG/ T 2269 —92
4.2. The tolerance values of the inner diameter, outer diameter, free height, working pressure, perpendicularity between the center line of the spring and the two end faces of the spring shall comply with the grade requirements of GB1239.2.
4.2.8 For multi-spring mechanical seals, the difference in free height between the springs in the mechanical seal shall not exceed 0.5mm. 4.2.9 The inner hole size tolerance of the spring seat and the transmission seat shall be F9, and the surface roughness Ra shall not exceed F3.21m. 4.2.1 The size series and tolerances of the PTFE V-ring shall comply with the provisions of GB3452.1, and its technical conditions shall comply with the provisions of relevant standards. 4.2.1 The size series and tolerances and technical conditions of the polytetrafluoroethylene V-ring shall comply with the provisions of relevant standards. 4.2.12 The technical conditions of the polytetrafluoroethylene corrugated arm shall comply with the provisions of relevant standards. 5.1 Leakage
5.1.1 The method for determining the leakage is in accordance with the provisions of HG2099. The leakage is the volume of the equivalent liquid under the pressure, which is stipulated as follows: when the shaft diameter is greater than 80 mm, the leakage is not more than 10 m/h; when the shaft diameter is not more than 80 mm, the leakage is not more than 8 mL/h; when the single-end seal structure is only qualitatively inspected for leakage, it is qualified if there are no obvious bubbles when observed by the naked eye; 5.1.2 When the working medium is toxic, flammable, or condensable gas, the leakage shall refer to the relevant safety regulations; 5.1.3 When the working medium is liquid, the average leakage is stipulated in the same way as 5.1.1.5.2 Abrasion
The size should meet the requirements of the service life of the alkali seal of the kettle. Under normal circumstances, the wear of the seal ring of soft materials is not more than 0:03mm after running for 100b.
5.3 Service life
Under the condition of reasonable structure, correct installation and use, when the working medium is neutral or weakly volatile gas or liquid, the service life of the mechanical seal is generally 8000h; when the working medium is highly corrosive or volatile gas, the service life of the mechanical seal is generally 4000h. Special circumstances are not subject to this limit,
5. 4 Static pressure test
The test force is 1.25 times the design pressure and lasts for 15m. The leakage rate is the same as 5.1.1. 6 Test of mechanical seals for steel or stainless steel
61 New products of mechanical seals for steel must undergo type testing. The testing is carried out in accordance with the requirements of HG2099. 6.2 Products of mechanical seals for steel must undergo factory testing before leaving the factory. The testing is carried out in accordance with the requirements of HG2099. Installation and use requirements
7.1 The shaft (or sleeve) of the mechanical seal for installation shall meet the following requirements: 1.1 The outer diameter tolerance of the agitator shaft (or sleeve) of the steel or stainless steel agitator is 9, and the surface roughness Ra is not greater than 1.6μm. The mechanical seal specified in HG2098, whether single-end or double-end type, cannot be considered as a support point. When the agitator shaft deflects or moves greatly, an intermediate bearing or a bottom bearing should be added. The radial runout tolerance of the agitator shaft shall be as specified in Table 1, and the axial speed disk shall not be greater than 0.5mm.
20 ~ 80
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Radial olefin male gasket
HG/T2269-92
7.1.2 Install the swivel ring auxiliary seal ring. The end of the shaft (or shaft change) shall be chamfered as shown in Figure 1 for easy installation. R1.6
Slip connection
7.1.3 Install the stationary ring auxiliary seal ring. The end and surface roughness of the hole shall be as specified in Figure 1 and Table 2. Slip connection
20 ~ 80
7.2 Before installing the mechanical seal for signing, check whether the main sealing components have any damage that may affect the sealing performance, and replace or repair them in time. 7.3 During installation, the shaft (or sleeve), sealing cavity, sealing end cover and the seal itself must be cleaned to prevent any impurities from entering the sealing components.
1.4 During installation, the product installation and operating instructions or this manual should be followed for correct installation. 7.5 For single-end signing mechanical seals, the isolation fluid should have a liquid level that is more than 30mm higher than the sealing end face. In general, the isolation fluid can be a clean machine seal.
HG/T2269-92
7.6 When the double-end mechanical seal is working, the pressure of the isolation fluid should be 0.05~0.2MPa greater than the internal pressure of the seal. The FK force supply device of the isolation fluid shall be designed or selected in accordance with the provisions of HG/T2122. 7.1 When the medium temperature is greater than 80°C, appropriate cooling measures must be adopted. Specific measures shall refer to the provisions of 1G/T2122. 8 Marking and packaging
81 The product identification mark, factory date, and manufacturer name shall be marked on the packaging box. 82 The product certificate shall be attached to the packaging box. The content of the certificate includes: product model, specification, number, manufacturer name, signature and date of the inspection department and inspection personnel. 8.3 The manufacturer shall provide product installation and use instructions according to user requirements. 9.1 The items of complete set supply include the following (provided according to user requirements): 9.1.1 The main parts include: rotating ring, stationary ring, auxiliary sealing ring, spring, spring seat, push ring, bellows, etc. 9.1.2 Spare parts include: soft material sealing ring, auxiliary sealing ring, small spring, 9.1.3 Auxiliary devices include: cooling clamp, heat exchanger, isolation fluid container, pressure buffer tank, oil pump, oil tank, etc. 9.1.4 Other supporting products include: sealing cavity, sealing end cover, stationary ring pressure plate, stationary ring seat, shaft sleeve, etc. 9.2 The user has the right to conduct sampling inspection on the delivered products according to the provisions of this standard. Additional remarks: This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Industry Special Seals Standardization Technical Committee of the Ministry of Chemical Industry. This standard is drafted by the Chemical Machinery Research Institute of the Ministry of Chemical Industry, and Beijing Chemical Machinery Factory and Jianjiang Chemical Machinery Seals Factory participated in the drafting. The main drafters of this standard are Zhang Aizhu, Xu Jinrong and Zhou Jianping. .bzsosocm People's Republic of China Chemical Industry Standard Technical Conditions for Mechanical Seals for Complete Use HG /T 2269 — 92 Editorial Department of Chemical Industry Standards (Standardization Research Institute of the Ministry of Chemical Industry) Postal Code: 100013 Printing Institute of Standardization of the Ministry of Chemical Industry Copyright reserved No omissions allowed Format 880× 1230 1 / 16
Number of words on a sheet 8000
First edition in June 1993
First printing in June 1993
Number of prints 1-1000
Cost 0.90 yuan
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