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Mechanical Seal

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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 way of email with our recommendation.

(Fields marked with red must be filled in.)

Contact Information
Mechanical Seal
Company Name:  
Contact Name:  
Equipment Data
Mechanical Seal
Pump Manufacturer:   
Model Number:  
Seal Part Number:  
Design & Dimensional Data
Mechanical Seal
Head Type: (see below):  
Head O.D.:  
Head Operating Height:  
Mating Ring Type: (see below)  
Mating Ring O.D.:  
Mating Ring Thickness:  
Shaft/Sleeve O.D.:  
Quantity Needed:  
Material Code
Mechanical Seal
If Known (see below):  

Head Types — U.S. SEAL MFG.
Head type A seal Head type B seal Head type C seal
Type A Type B Type C
Equal to: John Crane Type 6 Equal to: John Crane Type 6A Equal to: John Crane Type 21
Head type D seal Head type E seal Head type EB seal
Type D Type E Type EB
Equal to: John Crane Type 2 Equal to: John Crane Type 1 Equal to: John Crane Type 1 Balanced
Head type G seal Head type K seal Head type Q seal
Type G Type K Type Q
Equal to: John Crane Type 2100 & 2106 Equal to: John Crane Type 21 Dbl. Equal to: John Crane Type 11A
Head type R seal Head type S seal Head type T seal
Type R Type S Type T
Equal to: John Crane Type 2 Dbl. Equal to: John Crane Type 8 Spec Equal to: John Crane Type 1 Dbl.
Head type U seal Head type V seal Head type W seal
Type U Type V Type W
Equal to: John Crane Type 1 w/Sp. Adpt. Equal to: John Crane Type 8D Equal to: John Crane Type 9 & 9T
Head type X seal    
Type x    
Equal to: John Crane Type 8-1 & 8-1T    
Mating Ring Designs — U.S. SEAL MFG.
Cup Mtd. L-Shaped O-Ring
Mechanical Seal Seat type 1 Mechanical Seal Seat type 2 Mechanical Seal Seat type 3
1 2 3
Square Cross-Section Shaft Mounted Shaft Mounted
Mechanical Seal Seat type 5 Mechanical Seal Seat type 8 Mechanical Seal Seat type 9
5 8 9
Shaft Mounted Floating Clamped-In (Full)
Mechanical Seal Seat type 11 Mechanical Seal Seat type 25 Mechanical Seal Seat type 27
11 25 27
IMO Style Cup Mtd. w/ Adapter Cup Mtd. w/ Adapter
Mechanical Seal Seat type 28 Mechanical Seal Seat type 31 Mechanical Seal Seat type 32
28 31 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.

Mechanical Seal
B. Buna  A. Bronze  D. Brass  A. Bronze  E. Monel® 
N. Neoprene  C. Carbon  E. Monel®  G. Cast Iron  F. Stainless Steel 
Q. EPR  H. Glass Filled PTFE  F. Stainless Steel  J. Ceramic  P. Plated Steel 
T. PTFE  L. Silicon Carbide  P. Plated Steel  K. Ni-Resist   
V. Viton®  M. Molded Plastic    L. Silicon Carbide   
X. AFLAS® R. Silicon Carbide (CVR)    O. Stellite   
Y. Kalrez® S. Tooled Steel    S. Tooled Steel   
  Z. Tungsten Carbide    Z. Tungsten Carbide   
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
Mechanical Seal Value Guard SealDemand Quality.... Demand U.S. SEAL MFG.
Mechanical Seal
U.S. SEAL MFG. is a trademark of U.S. SEAL MFG.
Mechanical Seal
Mechanical Seal
Mechanical Seal
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