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
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
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