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Press-Fit Seal Specifications

The standard O-rings, made of black EPDM rubber, are used for general applications. They are resistant to ageing, heat and chemical additives.


The black EPDM rubber seal is standard for stainless steel and carbon steel systems. EPDM is suitable for temperatures between -20 and +120 °C and for pressures up to a maximum of 230PSI / 16Bar. It has a host of applications and is used for drinking water, heating, cooling, steam, firefighting, compressed air (oil-free) and inert gas systems.


The yellow HNBR rubber seal is used in gas systems. It is suitable for temperatures between -20 and +70 °C and for pressures up to a maximum of 70PSI / 5Bar.

Why are BSP Fittings so common in New Zealand?

The Metal Company Flat-Faced BSP Mac Unions

Common Grades of Aluminium

The Tasman (Lightweight) Flange Thickness

About Insertion Rubber Seals

About HNBR Rubber Seals

About Nitrile Rubber (NBR) Seals

About EPDM Rubber Seals

About EPR Rubber Seals

About Silicone Rubber Seals

About Viton Rubber Seals

About Teflon PTFE Rubber Seals

Is Stainless Steel ferrous or non-ferrous?

Is Aluminium ferrous or non-ferrous?

Does Stainless Steel and Aluminium react with each other?

Does Stainless Steel rust?

What temperatures can Stainless Steel withstand?

Can Stainless Steel be welded?

Is Stainless Steel magnetic?

What is Stainless Steel?

About our sight glasses

Ball Lock Turret Fittings

About Liquid Level Gauges

About our Lugged Butterfly Valves

What does RHS, SHS and CHS stand for?

What is a Mikalor Clamp?

What is a NPT Thread?