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Q6 What are the factory pressure tests for Hattersley valves?

Answer: Valves have slightly different test requirements, but in general pressure tests are as follows:

Copper-Alloy Valves:

For valves DN65 (2.1/2”) and above with a minimum pressure rating of PN32 the valves are tested hydrostatically (water) pressure shell 1.5 x PN rating for a specified time, related to valve size that is set down in BSEN 12266. Seat tests, where applicable, are 1.1 x PN rating for a specified time as per the same standard.

Generally valves DN50 (2”) and below with pressure rating on PN25 and below can be tested as above or on air at 6 bar shell and seat, if applicable for time specified in BSEN 12266. Hattersley generally test at 6 bar air for production speed and volume with sample test on hydrostatic.

Iron Valves:

Iron valves are tested hydrostatically (water) pressure shell 1.5 x PN rating for a specified time, related to valve size that is set down in BSEN 12266. Seat tests, where applicable, are 1.1 x PN rating for a specified time as per the standard.

Please refer to the sales office for specific details.


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