How to Select Wall Penetration Seals by Metraflex

How to Select Pipe Penetration Seals

Simple steps to choose the right size and style

For the vast majority of applications, the most economical Metraseal can be selected using the pipe material charts.

If your pipe and wall opening do not appear on these charts, use the

NOTE: These formulas work best for sizes not found in the pipe material charts.

Determine your wall opening. Select either the standard weight steel or PVC wall sleeve that was used or the diameter of the core bit drilled hole.

Find your nominal pipe size. Then read across to the sizing section for wall sleeves or core bit drilled holes. The first column identifies either the nominal wall sleeve size or the hole I.D. The appropriate MetraSeal model and number of links required is shown to the right.

To order, designate the number of links required, followed by the combination of the MetraSeal model and type. For example:
A 6" schedule 40 pipe in a 10" wall sleeve would be ordered as a 10MS475E.

MetraSeal Type Table

TYPE	SEAL MATERIAL	PRESSURE PLATES	BOLTS & NUTS	TEMPERATURE RANGE (ÄF)	APPLICATIONS*
E	EPDM Black	Glass reinforced plastic	STEEL zinc dichromate	-40 to +250	Suitable for most applications in water, both above ground and direct burial. Provides electrical insulation where cathodic protection is required.
ES	EPDM Black	Glass reinforced plastic	STAINLESS STEEL (18-8)	-40 to +250	Suitable for environments where the corrosion resistance of stainless steel hardware is required.
P	NITRILE	Glass reinforced plastic	STEEL zinc dichromate	-40 to +210	Resistant to most hydrocarbons, oil, gas, jet fuel, and many solvents.
PS	NITRILE	Glass reinforced plastic	STAINLESS STEEL (18-8)	-40 to +210	Same as above but with corrosion resistance of stainless steel hardware.
120	EPDM based intumescent	Steel zinc dichromate	Steel zinc dichromate	-40 to +250 or direct flame	Fire stop.
HT	Silicone	Steel zinc dichromate	Steel zinc dichromate	-40 to +400	High temperature applications.

*For more details and complete chemical compatibility, contact factory.