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.
Head Types – U.S. SEAL MFG.
Type A
Equal to: John Crane Type 6
Type B
Equal to: John Crane Type 6A
Type C
Equal to: John Crane Type 21
Type D
Equal to: John Crane Type 2
Type E
Equal to: John Crane Type 1
Type EB
Equal to: John Crane Type 1 Balanced
Type G
Equal to: John Crane Type 2100 & 2106
Type K
Equal to: John Crane Type 21 Dbl.
Type Q
Equal to: John Crane Type 11A
Type R
Equal to: John Crane Type 2 Dbl.
Type S
Equal to: John Crane Type 8 Spec
Type T
Equal to: John Crane Type 1 Dbl.
Type U
Equal to: John Crane Type 1 w/Sp. Adpt.
Type V
Equal to: John Crane Type 8D
Type W
Equal to: John Crane Type 9 & 9T
Type X
Equal to: John Crane Type 8-1 & 8-1T
Mating Ring Designs – U.S. SEAL MFG.
Cup Mtd.
1
L-Shaped
2
O-Ring
3
Square Cross-Section
5
Shaft Mounted
8
Shaft Mounted
9
Shaft Mounted
11
Floating
25
Clamped-In (Full)
27
IMO Style
28
Cup Mtd. w/ Adapter
31
Cup Mtd. w/ Adapter
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