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Guideline B-29

Question

Answer

Yes, if a vacuum relief valve is designed to be fitted to pressure equipment (PS > 0,5 bar) where collapse due to vacuum is possible under reasonably foreseeable conditions. The valve is a safety accessory as defined by Article2 (4) and must be assessed as such.

See also PED Guideline A-43.

Note:
Only those valves with a direct safety function shall be classified as a safety accessory.