This standard specifies the basic types, main dimensions, parameters, materials, model representation methods, technical requirements, etc. of mechanical seals for acid-resistant pumps. JB/T 7372-1994 Mechanical seals for acid-resistant pumps JB/T7372-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7372-94
Mechanical seals for acid-resistant pumps
Published on July 26, 1994
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1995
Mechanical Industry Standard of the People's Republic of China
Mechanical seals for acid-resistant pumps
1 Subject content and scope of application
JB/T7372-94
This standard specifies the basic types, main dimensions, parameters, materials, model representation methods, technical requirements, etc. of mechanical seals for acid-resistant pumps.
This standard applies to mechanical seals for acid-resistant pumps. 2 Reference standards
GB1184
GB/T 1804
GB6556
GB10444
ZBJ22002
ZBJ22004
ZBJ22006
ZBJ22017
ZBJ22022
JB4236
Form and position tolerances Provisions for unspecified tolerances General tolerances Unspecified tolerances for linear dimensions
Types, main dimensions, materials and identification marks of mechanical seals Methods for compiling mechanical seal product models||tt| |O-shaped rubber sealing ring for mechanical seal
Cylindrical helical spring for mechanical seal
Technical conditions for acceptance of mechanical seal products
Technical conditions for carbon graphite sealing ring for mechanical seal Technical conditions for filling tetrafluoroethylene and polytetrafluoroethylene wool for mechanical seal Test specification for mechanical seal
3 Basic types, main dimensions, working parameters and material codes 3.1 Basic types and main dimensions
a.151 type: external, single end, single spring, polytetrafluoroethylene bellows type, the structure type is shown in Figure 1, and the main dimensions are shown in Table 1. D, 152 type: external, single end, single spring, polytetrafluoroethylene bellows type, the structure type is shown in Figure 2, and the main dimensions are shown in Table 2. The structure type of 152a type is shown in Figure 3, and the main dimensions are shown in Table 2. e.
Type 153: internal installation, internal flow, single end face, multi-spring lean, low-cost tetrafluoroethylene bellows type, the structure type is shown in Figure 4, and the main dimensions are shown in Table 3. The structure type of type 153a is shown in Figure 5, and the main dimensions are shown in Table 4. d.Type 154: internal installation, single end face, single spring, unbalanced type, the structure type is shown in Figure 6, and the main dimensions are shown in Table 5, the structure type of type 154a is shown in Figure 7, and the main dimensions are shown in Table 6. bZxz.net
Approved by the Ministry of Machinery Industry on July 26, 1994
Implemented on July 1, 1995
JB/T7372-94
Figure 1151 series mechanical seal
1—stationary ring: 2—stationary ring adjustment: 3 bellows sealing ring: 4—spring front seat: 5—strong spring: 6—elastic rear seat, 7—tightening ring, 8—screw: 9—adjustment Table 1151 series mechanical seal main nominal dimensions 30
JB/T7372-94
Figure 2152 series mechanical seal
1—stationary ring sealing gasket: 2—stationary ring: 3 bellows sealing ring: 4—elastic seat: 5—elastic 6—hexagon socket screw: 7—half clamping ring, 8—tightening screw: 9—face fixing ring 7
Figure 3152a series mechanical seal
1-stationary ring: 2-stationary ring sealing gasket: 3-anti-rotation pin: 4-wave tube sealing ring: 5-spring seat; 6-spring: 7-spring gasket: 8-L base: 9-hexagon socket screw, 10-half clamp exposed ring ruler
JB/T7372--94
152.152a series mechanical seal main nominal size 40
Figure 4153 series mechanical seal
1-auxiliary sealing ring; 2-family rotating ring; 3-filled polytetraoxyethylene corrugated arm stationary ring; 4-auxiliary wide-shot diagram: 5-push: 6-strong fee
153-40
153-55
JB/T7372-94||tt| |Table 3 Main nominal dimensions of 153 series mechanical seals Nominal dimensions
Figure 5 153a series mechanical seals
1-Auxiliary seal pair; 2-Swivel ring, 3-Stationary ring filled with tetraethylene bellows; 4-Auxiliary sealing ring; 5-Push sleeve: 6-Elastic material L
153a-35
153a40
153a-45
1538-50
153a55
153a-70
JB/T7372-94
Main nominal dimensions of 153a series mechanical seals Nominal dimensions
Figure 6 154 series mechanical seals
1-Anti-rotation pin: 2-Harmful sealing ring: 3-Support ring, 4-Stationary ring: 5—dynamic ring: 6 sealing diagram: 7—push ring: 8-spring 9—shaft sleeve, 10—damage seal, 11—sealing diagram; 12—sealing diagram: 13—sealing cover: 14 sealing surface mm
JB/T7372-94
Table 5154 series machine seal main nominal dimensions 40
Figure 7154a series machine seal
1—anti-rotation pin: 2 sealing diagram: 3-selective ring: 4—aging ring, 5—dynamic ring, 6—sealing diagram, 7-push ring, 8—spring 9—tightening lamp, 10—key: 11 transmission seat, 12—sealing diagram: 13—sealing end cover: 14—sealing diagram mn
3.2 Working parameters
Working parameters are shown in Table 7.
3.3 Materials
JB/T 737294
Table 6154a series mechanical seal main nominal dimensions 40
Table 7 working parameters
Spring and other
Component materials
Chromium nickel steel
Chromium nickel molybdenum steel
High mirror alloy
3.4.1 Model representation method In addition to complying with the provisions of GB10444, it shall also meet the following requirements: 8
The materials and codes of mechanical seals for acid-resistant pumps shall comply with the provisions of GB6556. The types of materials are shown in Table 8. Table 8 Material types|| tt||Seal ring
Alumina
Silicon nitride
Silicon carbide
Filled with polytetrafluoroethylene
Diffused resin graphite
Carbon-graphite
Boron carbide
3.4 ​​model
Auxiliary seal ring
EPR
Ammonium rubber
Rubber outer package tetrafluoroethylene
Tetrafluoroethylene
Acidic liquid
Acidic liquid (except fluoric acid and fuming nitric acid)
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