What is the classification code for API682 mechanical seals?

What is the classification code for API682 mechanical seals?

The material and structural characteristics of mechanical seals must be numbered according to the following classification system:

*One letter: Stable (B) or Unstable (U)

*Two letters: single port (S), pressure free multiple seal (T) - that is to say, it is called "series connection" in the 7th edition

Sealing ", or pressure multiple sealing (D) - referred to as" double end face sealing "in the seventh edition

Third letter: Sealing plate (i.e. sealing screw cover) form: P=general type, without throttling shaft sleeve; T=

Throttle sleeve type, equipped with quenching, leakage liquid receiving hole and/or outlet liquid receiving hole; A=Assist in sealing equipment,

Model: The model must be specified.

Fourth letter: gasket (sealing ring) material (see Table 1)

Fifth letter: Port material (see Table 2)

Table 2: Fifth letter of mechanical seal number

For example, the number jd of BSTFM seal is a stable, single port, installation type

Sealing plate mechanical seal with throttling shaft sleeve, static sealing ring gasket material is FKM, dynamic seal

The gasket between the ring and the shaft sleeve is FKM, and the secondary material of the acoustic ring port is carbon to type II tungsten carbide, to type II tungsten carbide, to type II tungsten carbide,

Sealing materials other than the above materials should be numbered X and clearly specified on the data sheet.