Pump Shaft Seals

Face Materials

Pump Seals come in a wide range of designs however the most important factor.

Face Materials

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In-line Pump Seals

The term In-line seals simply refers to seals that are mounted to a shaft or sleeve.

In-line Pump Seals

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Metal Bellows

Metal bellows mechanical seals feature a bellows core made of one of several types...

Metal Bellows

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PTFE Pump Seals

Mechanical seals often need to be used in chemical applications.

PTFE Pump Seals

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PTFE Pump Seals:

Mechanical seals often need to be used in chemical applications. When confronted with some harsh chemicals, pump seals containing elastomers made of Viton, Kalrez or Chemrez can't hold up. Because PTFE (polytetrafluoroethylene)or as most people know it Teflon ® , has a 0-14 ph range it usually will hold up.

Like most materials every choice has an up and a down side. Because PTFE will handle most chemical applications, chemical attack is no longer an issue. One the down side PTFE wedges can cause fretting of your sleeve or shaft if you have not hard surfaced your shaft or sleeve (plasma coating).

The stationary element of your seal will require a PTFE gasket. It's not much good to have a PTFE on the rotary and then use an elastomer on the seat. We have seen it done, and because it is a static application some have gotten away with it, but it is not recommended. Most commonly the seat will be a L-shaped or Clamped mount style to allow space for a PTFE gasket to be used as the secondary sealing element..

Below are couple examples of

PTFE Pump Seals

ASP Type 9 Pump Seal PTFE Bellow Pump Seal
ASP Type 9 Pump Seal with PTFE Wedge (Inside Seal) PTFE Bellow Pump Seal (Outside Seal)
Ask your American Seal & Packing sales representative for installation directions.

E-Mailabout your pump seals applications.

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