impeller.net The Online Pump Magazine

18.09.2003

Rated Pressure

The pressure rating (also nominal pressure rating) is required for the standardisation of components, described by the internationally (ISO 7286) accepted term PN.

It is stated without a unit quantity. Its numerical value states the permissible working gauge pressure in bar at a temperature of 20C (68F) to which a component or specified material may be subjected. Pressure ratings referred to in the pump selection programme accord to DIN 2401 for the range from PN 1.6 to PN 200.

Preferential designation for pressure ratings are 1.6; 2.5; 4; 6; 10; 16; 25; 40....