Type, main dimension, material and marking of mechanical seals
1 Scope
This standard specifies the type, main dimension, marking and material code of mechanical seals for centrifugal pumps and similar rotating machinery.
This standard is applicable to single and double mechanical seals.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1804-2000 General tolerances — Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 10444 Method of type establishment for mechanical seals
3 Type and main dimension
3.1 General requirements
Various types of mechanical seals can be adopted with reference to the structure shown in Figures 1 to 6, but shall follow the given dimensions. The figures show examples of using O-ring as stationary ring auxiliary seals, and seals of other cross-section types may also be used as stationary ring auxiliary seals. Dimensional tolerances not specified shall be in accordance with Class F in GB/T 1804-2000.
3. 2 Types of single mechanical seals
Type U: Unbalanced single mechanical seal, see Figure 1.
Type B: Balanced single mechanical seal, see Figure 2.
Foreword i
1 Scope
2 Normative References
3 Type and main dimension
4 Markings
5 Material codes
Type, main dimension, material and marking of mechanical seals
1 Scope
This standard specifies the type, main dimension, marking and material code of mechanical seals for centrifugal pumps and similar rotating machinery.
This standard is applicable to single and double mechanical seals.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1804-2000 General tolerances — Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 10444 Method of type establishment for mechanical seals
3 Type and main dimension
3.1 General requirements
Various types of mechanical seals can be adopted with reference to the structure shown in Figures 1 to 6, but shall follow the given dimensions. The figures show examples of using O-ring as stationary ring auxiliary seals, and seals of other cross-section types may also be used as stationary ring auxiliary seals. Dimensional tolerances not specified shall be in accordance with Class F in GB/T 1804-2000.
3. 2 Types of single mechanical seals
Type U: Unbalanced single mechanical seal, see Figure 1.
Type B: Balanced single mechanical seal, see Figure 2.
Contents of GB/T 6556-2016
Foreword i
1 Scope
2 Normative References
3 Type and main dimension
4 Markings
5 Material codes