Seal Identification Form

Need assistance specifying the right seal for your job? Fill out the form below as completely as possible and we’ll be glad to get back to you by email with our recommendation.

For assistance with selecting the correct Head Type, Mating Ring Type, and Material Code, please refer to the images and information below the form.

Company Information
Equipment Data
Design & Dimensional Data

Head Types – U.S. SEAL MFG

Type A

Type A
Equal to: John Crane Type 6

Type B

Type B
Equal to: John Crane Type 6A

Type C

Type C
Equal to: John Crane Type 21

Type D

Type D
Equal to: John Crane Type 2

Type E

Type E
Equal to: John Crane Type 1

Type Eb

Type EB
Equal to: John Crane Type 1 Balanced

Type G

Type G
Equal to: John Crane Type 2100 & 2106

Type K

Type K
Equal to: John Crane Type 21 Dbl.

Type Q

Type Q
Equal to: John Crane Type 11A

Type R

Type R
Equal to: John Crane Type 2 Dbl.

Type S

Type S
Equal to: John Crane Type 8 Spec

Type T

Type T
Equal to: John Crane Type 1 Dbl.

Type U

Type U
Equal to: John Crane Type 1 w/Sp. Adpt.

Type V

Type V
Equal to: John Crane Type 8D

Type W

Type W
Equal to: John Crane Type 9 & 9

Type X

Type X
Equal to: John Crane Type 8-1 & 8-1T

Mating Ring Designs – U.S. SEAL MFG.

Cup Mtd.

Seal 01

1

L-Shaped

Seal 02

2

O-Ring

Seal 03

3

Square Cross-Section

Seal 05

5

Shaft Mounted

Seal 08

8

Shaft Mounted

Seal 09

9

Shaft Mounted

Seal 11

11

Floating

Seal 25

25

Clamped-In (Full)

Seal 27

27

IMO Style

Seal 28

28

Cup Mtd. w/ Adapter

Seal 31

31

Cup Mtd. w/ Adapter

Seal 32

32

Material Code

The Material Code is a five character code such as “BCFZF” which is defined by the following parameters. The first character specifies the Elastomer type, the second character specifies the Washer type, etc.

Secondary Seals Primary Rings Metal Parts Mating Rings Springs
B. Buna
N. Neoprene
Q. EPR
T. PTFE
V. Viton®
X. AFLAS®
Y. Kalrez®		 A. Bronze
C. Carbon
H. Glass Filled PTFE
L. Silicon Carbide
M. Molded Plastic
R. Silicon Carbide (CVR)
S. Tooled Steel
Z. Tungsten Carbide		 D. Brass
E. Monel®
F. Stainless Steel
P. Plated Steel		 A. Bronze
G. Cast Iron
J. Ceramic
K. Ni-Resist
L. Silicon Carbide
O. Stellite
S. Tooled Steel
Z. Tungsten Carbide		 E. Monel®
F. Stainless Steel
P. Plated Steel

AFLAS® is a registered trademark of Asahi Glass Co., Ltd.
Kalrez® is a registered trademark of DuPont Performance Elastomers, LLC
Viton® is a registered trademark of DuPont Performance Elastomers, LLC
Monel® is a registered trademark of Special Metals Corporation