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API 610 and seal codes

API 610 and seal codes

API 610 and seal codes

(OP)
Can someone elaborate what the letters in the seal code BSTFN is from Table H7 of API 610 8th edition? I know the Balanced and Single parts, but for the rest I'm just guessing. Are seal face materials part of this code?

It's for a vertically suspended cooling tower sump pump if that helps any. Materials for the pump are to Table H1, material class S1. Seal includes API flush plan 13.

I only have API 610, 9th edition so I'm afraid the old 8th edition codes are a bit of a mystery.

Thanks,

Tim

RE: API 610 and seal codes

BSTFN

3rd letter
T - Seal gland type (P = plain, no throttle bushing; T = throttle bushing with quench, leakage and/or drain connections; A = auxilary sealing device, type to be specified)  Note:  See 2.7.3.21

4th letter
Gasket Materials (see Table H-4)
Table H-4 (S/Ring - Seal Ring)
Letter   Stationary S/Ring Gasket   S/Ring to Sleeve Gasket
E              FKM                       PTFE
F              FKM                       FKM
G              PTFE                      PTFE
H              Nitrile                   Nitrile
I              FFKM                      FFKM Elastomer
R              Graphite Foil             Graphite Foil
X              As specified              As specified
Z              Spiral wound              Spiral wound

5th Letter
Face Materials (See Table H-5)

Table H-5
5th Letter       Ring 1                Ring 2
L                Carbon               Tungsten carbide 1
M                Carbon               Tungsten carbide 2
N                Carbon               Silicon carbide
O                Tungsten carbide 2   Silicon carbide
P                Silicon carbide      Silicon carbide
X                As specified         As specified

good luck!
-pmover

RE: API 610 and seal codes

(OP)
Excellent! Thanks.

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