This standard specifies the dimensions of the sealing cavity for stepped balanced mechanical seals, mechanical seals for straight shafts and soft packings for horizontal axial suction centrifugal pumps, including those in accordance with GB/T 5662. Although this standard is suitable for general purpose and heavy duty process applications, it is not intended for use in processes containing mud or large amounts of solid particles. This standard provides two optional cavity series: a) Stuffing box cavity series, suitable for soft packing or mechanical seals for general purpose processes, with a sealing chamber limit gauge pressure of up to 1.6 MPa. b) Large cavity series, suitable for mechanical seals for general purpose and heavy duty processes, including integral insert mechanical seals, with a sealing chamber limit gauge pressure of up to 4.0 MPa. GB/T 5661-2004 Cavity dimensions for mechanical seals and soft packings for axial suction centrifugal pumps GB/T5661-2004 Standard download decompression password: www.bzxz.net

ICS 23.080
National Standard of the People's Republic of China
GB/T 5661--2004
Replaces GB/T 5661-1985
End-suction centrifugal pumpsDimensions of cavities for mechanical seals andfor soft packing
(ISO 3069:2000, MOD)
Issued on June 9, 2004
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on December 1, 2004
GB/T5661-2004
This standard is modified to adopt the international standard IS03069:2000 "Cavity dimensions for centrifugal mechanical seals and soft packings for shaft bearings (English version)".
This standard replaces GB/T56611985 "Dimensions of cavities for mechanical seals and soft packings for axial suction centrifugal pumps". This standard is redrafted based on ISO33G69:2000. For the convenience of comparison, a comparison table of the article numbers of this standard and those of IS03069:2000 is listed in the informative appendix A. Taking into account my country's national conditions, this standard has been revised when adopting international standards. A table of technical differences and their sources is given in the informative appendix B for reference.
This standard is different from GB:56611985. The main changes of this standard are as follows: the scope of this standard, the applicable documents, terms and definitions, seal chamber design requirements, Appendix C and references are all new contents added to the original standard. In Table 1 of Chapter 4 "Dimensional specifications for seal chambers and gland accessories", the range from d1-75 mm to d1-100 mm is a new range. The range of d=70 mm is d1-75 mm and d1-104 mm. mm is also newly added: the size series in the original standard is from d1-18 mm to d703 mm. Table 2 is newly added, which is suitable for the large seal chamber size series of heavy working conditions. Table A1 is also newly added, which is suitable for the seal chamber size series of general-purpose built-in mechanical seals. In addition, the size specifications of the gland accessories are added. For the convenience of use, the following editorial modifications are made to the standard: a) the term "this international standard" is changed to "this standard"; ) the decimal point "" is used instead of the number "" as a decimal point; c) the "disclaimer" in the preface of IS0 3069:2960 is removed. There are 3 standards in this group for axial suction centrifugal cases. In addition to this standard, there are GB/T5662-1985 and GB/T5660-1985. They are still the current valid standards.
Appendix A, Appendix B and Appendix ( of this standard are informative appendices. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Pump Standardization Technical Committee. The unit of this standard is Shenyang Pump Research Institute. The main drafters of this standard are Hu Maosao and Yang Lihua. 1 Scope
Dimensions of mechanical seals and cavities for soft materials for axial suction centrifugal pumps
GB/T5661—2004
This standard specifies the dimensions of the cascade balanced mechanical seals, mechanical seals with straight shafts and sealing cavities for soft packings used in horizontal axial suction centrifugal pumps including GB/T5662. Although this standard is suitable for general-purpose and heavy-duty process applications, it is not intended to be used in processes containing mud or a large amount of solid particles. This standard provides two optional cavity series: a) Stuffing box cavity series, suitable for soft packings or mechanical seals for general-purpose processes, and the limit gauge pressure of the sealing chamber is up to l, 6 MPa.
h) Large cavity series. Suitable for general purpose and heavy working condition process mechanical seals, including integrated plug-in mechanical seals, the sealing chamber limit gauge pressure is up to 4.0MPa.
2 Normative reference documents
The clauses in the following documents become the clauses of this standard through reference in this standard. For all the referenced documents with a date, all the subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all the referenced documents without a date, the latest version applies to this standard. GB/T5656 Technical conditions for centrifugal pumps (Class II) (GB/T5656-1994, ISO 5199: 1986) GB/T5657 Technical conditions for centrifugal pumps (Class III) (GB/T5657-1995, ISO 9908: 1993) GB/T6556 Types, main dimensions, materials and identification marks of mechanical seals GB/T16907 Technical conditions for centrifugal pumps (Class 1) (GB/T16907-1997, ISO 9905: 1994) 3 Terms and definitions
This standard adopts the following terms and definitions.
Cartridge mechanical seal A seal assembly that is pre-assembled and adjusted before installation, including a mechanical seal, a gland, a sleeve and a matching ring.
Flush
Introducing the fluid in the seal chamber near the seal surface on the process fluid side, the passage is used to cool the mechanical seal and continuously remove steam and/or dirt in the seal chamber.
Sealing device end surface ae
The surface of the fixed device and equipment, the seal gland is fixed on this surface. Note: This plane is generally the sealing end of the seal chamber. 1) The reference standard in IS0D3069 is "EN12756 Mechanical Seal Main Dimensions, Identification Code and Material Code". GB/T6556 replaces FN12756. This affects the application results (see 4.).
GB/T 5661—2004
Seal cavity
The space filled with fluid contained by the seal chamber. Note: The mechanical seal rotates in the seal cavity. 3.5
seal chamber
a component forming the sealing area between the shaft and the housing, which is either integral with or separate from the housing. Method: The mechanical seal is installed in the seal chamber.
seal gland plate
an end cover connecting the mechanical seal assembly to the seal chamber. 3.7
spigot
a grommet portion of a joint, used for radially accurate positioning of two machined parts. 3.8
stuffing box
a cylindrical seal chamber designed for the use of soft packing to reduce leakage along the shaft surface. 3.9
total axial run-out tolerancetotal axial run-out toleranceThe tolerance band defined by two parallel planes spaced at regular intervals and perpendicular to the reference axis of the shaft. Note: The information can be measured by measuring the total movement indication value of the adjacent cylindrical surface relative to a specified vertical surface (·sleeping seal device end face) during the number of revolutions through a dial indicator fixed on the shaft. 3. 10
radial total run-out tolerance ntal radial run-out tolerance The tolerance zone defined by two coaxial cylindrical surfaces with a specified radial spacing and the axis of the tool coincident with the axis of the base. Note: The information can be measured by measuring the total movement indication value of the adjacent cylindrical surface relative to a specified vertical surface during the number of revolutions through a dial indicator fixed on the reference axis part (rotating shaft or case seal, depending on the tolerance zone to be recorded) 4. Specifications for the dimensions of seal chambers and gland accessories 4.1- General purpose stuffing box and seal chamber accessory dimensions (seal chamber code IS0 3069-S) The true diameters shown in Figures 1, 2 and 3 shall have the values ​​given in Table 1. The point diameters are provided so that either a stuffing box or a mechanical seal can be used.
Dimensions suitable for self-contained plug-in mechanical seals are shown in Appendix A Mechanical seals designed to the dimensions required by ISO 3069-S seal chambers. t
Figure 1 Mechanical seal or soft packing with or without sleeve t
Figure 2 Stepped balanced mechanical seal with or without stub sleeve Figure 3 Stepped balanced mechanical seal with extended sleeve Table Stuffing box and seal chamber dimensions
GB/T 5661—2004
Single inspection is mm
GB/T 5661--2004
ho tolerance does not apply to d in Figures 2 and 3. 1 (continued)
Unit: mm
The meridional clearance between the rotating parts of the mechanical seal and the seal chamber bore may affect the reliability of the seal. When the service conditions are severe, such as high solid content or excessive temperature on the surface that may cause the mechanical seal to break, there should be a meridional clearance of at least 3t1. This is particularly important for mechanical seals without flushing. In addition, the taper can also help improve the general seal performance. When using soft packing, use HII public extraction
Not the preferred size, new designs should not be used
4.2 Dimensions of seal chamber and seal gland accessories for process applications (seal chamber code ISO 3069-II) The dimensions shown in Figures 4, 5 and 6 should have the values ​​given in Table 2. Note: This design is suitable for self-assembled plug-in mechanical seals. However, the size restrictions do not necessarily apply to pumps that comply with GB/T 566?. f.
1---to the nearest obstacle.
Minimum diameter is 3m.
Figure 4 Sealing chamber
14 studs d
Figure 5 Sealing device end face and studs
Figure 6 Optional outer stop
Table 2 Dimensions of sealing chamber and gland accessories et.bzxZ.net
Note 1: The gland should be radially positioned with the inner stop of the hole diameter. Note 2: The optional outer stop is shown in Figure 6.
M12X1.￥5
M12× 1, 75
M12×1. 75
M2t :: 2. 5
GB/T5661--2004
Unit: mm
GB/T5661—2004
5 Requirements for sealing chamber design
5.1 Venting and liquid discharge
If the mechanical seal works in air or gas for a long time, its reliability will be affected. Therefore, the sealing chamber should have a device to remove the air or gas sealed in the chamber. When a device for this purpose is needed, the joint of the vent valve should be located at the highest position. When the seal is disassembled, the process liquid may be harmful to the environment or pollute it. When there is a device to fully vent the body of the seal cavity, the joint for venting the liquid should be set at the lowest practical position. 5.2 Verticality and coaxiality of the sealing surface
The verticality and coaxiality of the sealing cavity and the end face of the sealing device will affect the performance of the mechanical seal. The following tolerances shall not be exceeded.
a) The coaxiality of the sealing gland to the shaft is controlled by the stop diameter d or the hole diameter d, d. or d. (depending on the design of the cavity). The radial total runout tolerance of this surface should not be greater than 0.13. b)
The verticality of the end face of the sealing device to the axis of the shaft can be checked by measuring its axial (end face) total runout tolerance. The axial runout tolerance of the sealing surface shall not exceed 0.01mm/20mm. Sealing chamber hole: c) The manufacture and assembly of the shaft and sleeve (if installed) shall ensure that the radial total runout tolerance complies with GB/T16907, GB/T5656 and GB/T5657 at an axial position consistent with the end face of the sealing cover with the sealing chamber as the reference. Appendix A
(Informative Appendix)
Comparison table of chapter and article numbers of this standard and chapter and article numbers of IS0 3069:2000 A.1 gives a comparison table of chapter and article numbers of this standard and chapter and article numbers of IS0 3069:2000. Table A.1 Comparison of the chapter and clause numbers of this standard with those of IS0 3069:2000 Chapter and clause number of this standard
Appendix A
Appendix B
Appendix C
GB/T5661-2004
International standard for convection Chapter and clause number
Appendix A
GB/T5661—2004
Appendix B
(Ceramic material appendix)
Technical differences between this standard and IS0 3069:2000 and their causes Table B.1 gives a list of the technical differences between this standard and ISO3069:2000 and their causes. B.1 Technical differences between this standard and IS0 3069:2000 and their original numbers Technical differences This standard cites Chinese standards that adopt international standards, rather than international standards. Among them, GB/T 6556 is EN 12756 in IS0) 3069:2000. Replacing EN12756 with GB/T6556 does not affect the citation results. The original version is suitable for my country's national conditions. EN12756 has not been converted into a Chinese standard. Appendix C (Informative Appendix) Cavity dimensions for general self-assembled plug-in mechanical seals (seal cavity code 1S03069-C) GB/T 5661—2004
Using proven metric seal components, self-contained insert mechanical seals are difficult to fit into general purpose stuffing box sizes (see Table 1). The consistency of the seal face dimensions will simplify the selection of the stop position and the rationalization of the seal gland. The dimensions recommended in Figure C.1, Figure C.2 and Table C.1 are suitable for the integrated plug-in mechanical seals designed for general use for centrifugal use. The limit gauge pressure of the sealing air is up to 1.6Ma
1..To the nearest obstacle.
I---stud d
Seal chamber
Figure C.2 Sealing device end face and studs
GB/5661--2004
Dimensions of seal chamber and seal gland accessories
(H7/17)
M10×1.5:
M10xt. 5*
M12×1.75
M12×1.75
M16 x2. C
M16×2. C
M16×2. C
Unless otherwise specified, the minimum recommended stud size for 1S09905 and 1S)5199 is M12. The dimension is set so that the outer stop can be used to radially locate the gland. Min. Is
is in meters
Min L,5.2 Verticality and coaxiality of the sealing surface
The verticality and coaxiality of the sealing chamber and the end face of the sealing device will affect the performance of the mechanical seal. The following tolerances shall not be exceeded.
a) The coaxiality of the sealing gland to the shaft is controlled by the stop diameter d or the hole diameter d, d. or d. (depending on the design of the cavity). The radial total runout tolerance of this surface should not be greater than 0.13. b)
The verticality of the end face of the sealing device to the axis of the shaft can be checked by measuring its axial (end face) total runout tolerance. The axial runout tolerance of the sealing device surface should not be greater than 0.01mm/20mm Sealing chamber hole: c) The manufacture and assembly of the shaft and the sleeve (if installed) should ensure that the radial total runout tolerance conforms to GB/T16907, GB/T5656 and GB/T5657 at an axial position consistent with the end face of the sealing cover with the sealing chamber as the reference. Appendix A
(Informative Appendix)
Comparison table of chapter and clause numbers of this standard and those of IS0 3069:2000A.1 gives the comparison table of chapter and clause numbers of this standard and those of IS0 3069:2000. Table A.1 Comparison of the chapter and clause numbers of this standard with those of IS0 3069:2000 Chapter and clause number of this standard
Appendix A
Appendix B
Appendix C
GB/T5661-2004
International standard for convection Chapter and clause number
Appendix A
GB/T5661—2004
Appendix B
(Ceramic material appendix)
Technical differences between this standard and IS0 3069:2000 and their causes Table B.1 gives a list of the technical differences between this standard and ISO3069:2000 and their causes. B.1 Technical differences between this standard and IS0 3069:2000 and their original numbers Technical differences This standard cites Chinese standards that adopt international standards, rather than international standards. Among them, GB/T 6556 is EN 12756 in IS0) 3069:2000. Replacing EN12756 with GB/T6556 does not affect the citation results. The original version is suitable for my country's national conditions. EN12756 has not been converted into a Chinese standard. Appendix C (Informative Appendix) Cavity dimensions for general self-assembled plug-in mechanical seals (seal cavity code 1S03069-C) GB/T 5661—2004
Using proven metric seal components, self-contained insert mechanical seals are difficult to fit into general purpose stuffing box sizes (see Table 1). The consistency of the seal face dimensions will simplify the selection of the stop position and the rationalization of the seal gland. The dimensions recommended in Figure C.1, Figure C.2 and Table C.1 are suitable for the integrated plug-in mechanical seals designed for general use for centrifugal use. The limit gauge pressure of the sealing air is up to 1.6Ma
1..To the nearest obstacle.
I---stud d
Seal chamber
Figure C.2 Sealing device end face and studs
GB/5661--2004
Dimensions of seal chamber and seal gland accessories
(H7/17)
M10×1.5:
M10xt. 5*
M12×1.75
M12×1.75
M16 x2. C
M16×2. C
M16×2. C
Unless otherwise specified, the minimum recommended stud size for 1S09905 and 1S)5199 is M12. The dimension is set so that the outer stop can be used to radially locate the gland. Min. Is
is in meters
Min L,5.2 Verticality and coaxiality of the sealing surface
The verticality and coaxiality of the sealing chamber and the end face of the sealing device will affect the performance of the mechanical seal. The following tolerances shall not be exceeded.
a) The coaxiality of the sealing gland to the shaft is controlled by the stop diameter d or the hole diameter d, d. or d. (depending on the design of the cavity). The radial total runout tolerance of this surface should not be greater than 0.13. b)
The verticality of the end face of the sealing device to the axis of the shaft can be checked by measuring its axial (end face) total runout tolerance. The axial runout tolerance of the sealing device surface should not be greater than 0.01mm/20mm Sealing chamber hole: c) The manufacture and assembly of the shaft and the sleeve (if installed) should ensure that the radial total runout tolerance conforms to GB/T16907, GB/T5656 and GB/T5657 at an axial position consistent with the end face of the sealing cover with the sealing chamber as the reference. Appendix A
(Informative Appendix)
Comparison table of chapter and clause numbers of this standard and those of IS0 3069:2000A.1 gives the comparison table of chapter and clause numbers of this standard and those of IS0 3069:2000. Table A.1 Comparison of the chapter and clause numbers of this standard with those of IS0 3069:2000 Chapter and clause number of this standard
Appendix A
Appendix B
Appendix C
GB/T5661-2004
International standard for convection Chapter and clause number
Appendix A
GB/T5661—2004
Appendix B
(Ceramic material appendix)
Technical differences between this standard and IS0 3069:2000 and their causes Table B.1 gives a list of the technical differences between this standard and ISO3069:2000 and their causes. B.1 Technical differences between this standard and IS0 3069:2000 and their original numbers Technical differences This standard cites Chinese standards that adopt international standards, rather than international standards. Among them, GB/T 6556 is EN 12756 in IS0) 3069:2000. Replacing EN12756 with GB/T6556 does not affect the citation results. The original version is suitable for my country's national conditions. EN12756 has not been converted into a Chinese standard. Appendix C (Informative Appendix) Cavity dimensions for general self-assembled plug-in mechanical seals (seal cavity code 1S03069-C) GB/T 5661—2004
Using proven metric seal components, self-contained insert mechanical seals are difficult to fit into general purpose stuffing box sizes (see Table 1). The consistency of the seal face dimensions will simplify the selection of the stop position and the rationalization of the seal gland. The dimensions recommended in Figure C.1, Figure C.2 and Table C.1 are suitable for the integrated plug-in mechanical seals designed for general use for centrifugal use. The limit gauge pressure of the sealing air is up to 1.6Ma
1..To the nearest obstacle.
I---stud d
Seal chamber
Figure C.2 Sealing device end face and studs
GB/5661--2004
Dimensions of seal chamber and seal gland accessories
(H7/17)
M10×1.5:
M10xt. 5*
M12×1.75
M12×1.75
M16 x2. C
M16×2. C
M16×2. C
Unless otherwise specified, the minimum recommended stud size for 1S09905 and 1S)5199 is M12. The dimension is set so that the outer stop can be used to radially locate the gland. Min. Is
is in meters
Min L,
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