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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Balanced Seals:

When speaking of "Balance" in reference to pump seals, we are not talking about Mechanical or Rotational Balance. Instead, we are referring to Hydraulic Balance.

•Since mechanical seals are subject to stuffing box pressure, this pressure is utilized to achieve and maintain seal face closure in a non-balanced seal.

•If stuffing box pressure is very high, typically over 100psi., then the closing force may be too great to allow the "Boundary Layer Liquid" that lubricates the faces to be sufficient and the faces will wear prematurely.

•A balanced seal compensates for higher pressures by locating the seal faces such that stuffing box pressure has less effect on face closure.

Balanced Seals Ask your American Seal & Packing sales representative for installation directions.

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