End-suction centrifugal pumps - Dimensions of cavities for mechanical seals and for soft packing
1 Scope
This standard specifies the terms and definitions of mechanical seals and soft packing of end-suction centrifugal pumps (hereinafter referred to as pumps), dimensions of seal cavity and gland plate attachments, and design requirements of seal cavity.
This standard is applicable to pumps for general purpose and heavy-duty process applications.
This standard is not applicable to mud pumps and impurity pumps.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5656 Technical specification for centrifugal pumps - Class II
GB/T 5657 Technical specifications for centrifugal pumps (Class III)
GB/T 6556 Type, main dimension, material and marking of mechanical seals
GB/T 16907 Technical specifications for centrifugal pumps (Class I)
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
cartridge mechanical seal
sealing member which is pre-assembled and adjusted before installation, including mechanical seal, gland plate, shaft sleeve and a mating ring
3.2
flush
flow of fluid introduced into the seal cavity on the process fluid side, in close proximity to the sealing faces, and usually used for cooling the mechanical seal and continuously removing vapour or contaminants from the seal cavity
3.3
gland face
mounting arrangement and equipment surface to which the seal gland plate is clamped
3.4
seal cavity
fluid-filled space contained by the seal chamber
Note: The mechanical seal rotates in the seal cavity.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Dimensions of seal cavity and seal gland plate attachments
5 Design requirements for seal cavity
Annex A (Informative) Dimensions of cavities for cartridge mechanical seals for general-purpose duties (seal cavity code C)
Bibliography
