Mechanical Seal Flush

Application Summary


Mechanical Seal Flush


Flushing of mechanical seals on industrial pumps to extend life of the seal

How It’s Used

Pump fluid from the output or from an external source into the seal for cleaning and cooling

Key Feature

Well controlled smooth flow

End Equipment

Industrial Pumps

Pump Function



Various fluids used in industrial applications

Flow Rate

15 to 19 L/min (240 to 300 USG/hr)

Differential Pressure

<840 psi (<59 bar)

Applications Overview

Flushing of mechanical seals, on large industrial pumps, is used to extend the life of the seal by cleaning and/or cooling the seal. There are many methods for implementing seal flush, but all either recirculate fluid from various other points on the industrial pump (usually the output) or use an external source for the flushing stream.

In either case a step-up in pressure, and/or flow control may be required, and a small Micropump pump is often used for that purpose. Micropump gear pumps are well suited for this application because they provide a well-controlled, smooth flow, and are built of materials that provide chemical capability and the temperature range require for most applications.

Micropump gear pumps provide differential pressure and flow control needed either for re-circulation or when using an external flushing stream.

Performance Summary

This chart indicates optimal operating ranges for recommended products.

Micropump Products Optimized for this Application

Micropump Series GC pumps are commonly used for Seal Flush applications. The Series GC pump is a Suction Shoe style gear pump. Suction Shoe style gear pumps can operate over large temperature ranges and provide consistent flow with pump wear. The Series GC provides the flow control and smooth, pulseless flow required for these applications.

Suction Shoe Technology

GC Series


0.811 ml/rev (M23)
1.82 ml/rev (M25)
3.48 ml/rev (M35)

Differential Pressure (max):

8.6 bar | 125 psi

System Pressure (max):

103 bar | 1500 psi

Cavity Technology

GLH Series


4.6 ml/rev (H21)
6.2 ml/rev (H23)
7.7 ml/rev (H25)

Differential Pressure (max):

8.6 bar | 125 psi

System Pressure (max):

103 bar | 1500 psi

The Micropump Advantage

The unparalleled quality, performance record, reliability and long operating life of Micropump pumps and our extensive engineering expertise make Micropump a vital partner in this demanding market.

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