mechanical rotory pump shaft seals

American Seal & Packing
Division of Steadman & Associates, Inc.

We specialize in single spring mechanical pump shaft seals for rotory / 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 compairing your mechanical seal components to the drawings below.

The "working length" of the seal is critical to your seal application. To identify the working length, measure your mechaical 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.

To make sure your pump seals stationay 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 acurrate measurement. Most pump seal stationary seats have a rubber cup or o-ring that must be compressed when it is installed.

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. Niresist
AFLAS TM	M. Molded Plastic		L. Silicon Carbide
Secondary Seals
PTFE			Z. Tungston Carbide
I. Non Asbetos	Z. Tungten Carbide

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

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Viton ® is a trademarks of DuPont Dow Elastomers
*Trademark of Asahi Glass Co. Ltd

Last Updated on 8/04/97
By American Seal & Packing
Email: seals@americansealandpacking.com