Pump Seals

We specialize in single spring mechanical pump shaft seals for rotary / centrifugal pump applications. It's easy to replace your pump seals if you know what they are. If you do not have a pump seal number such as PS-100, you can identify what kind of seal you have, by comparing your mechanical seal components to the pictures.

Type A Type B Type C Type D Type E Type K Type N Type Q Type R Type S
(Click the above links for a cross sectional drawing of the selected seal.)

The "working length" of the seal is critical to your seal application. To identify the working length, measure your mechanical seal end to end as it is pictured above, this is your seals "total length". From this you must subtract 50% of the uncompressed spring length. This is your mechanical seals working length.

For seal dimensions follow this link and look up the seal by shaft size and "Type" (A,B,C,D,E,F,K,N,Q,R,S,T or ,U)

For instructions on how to identify a used seal follow this link

To make sure your pump seals stationary seat fits, it's a good idea to provide the inside dimension of the bore it will be fitting into. The outside dimension of your seals stationary seat is helpful but more difficult to obtain an accurate measurement. Most pump seal stationary seats have a rubber cup or o-ring that must be compressed when it is installed.

Seat Types

To decipher a mechanical seals materials code, use the following chart


Elastomers	Seal Face	Metal Parts	Seal Seats	Springs
B. Buna	A. Bronze	A. Bronze	A. Bronze	E. Monel
V. Viton ®	C. Carbon	D. Brass	G. Cast Iron	F. Stainless
N. Neoprene	H. Glass Filled PTFE	E. Monel	J. Ceramic
		F. Stainless	K. Ni-resist
AFLAS TM	M. Molded Plastic		L. Silicon Carbide
Secondary Seals
T- PTFE			Z. Tungsten Carbide
I. Non Asbestos	Z. Tungsten Carbide

A sample material code could be: B C F L F

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Viton® is a trademarks of Dupont Performance Elastomers
*Trademark of Asahi Glass Co. Ltd

Last Updated on 8/02/2002
By American Seal & Packing
Email: seals@americansealandpacking.com