MIL-V-18634B (NOTICE 2), MILITARY SPECIFICATION, VALVES; SAFETY, RELIEF, AND SAFETY-RELIEF (30 JUN 1998)., MIL-V-18634B, dated 3 April 1981, is hereby canceled. The preparing activity for this document has determined that the documents shown below are suitable replacements for the given classes. Users are cautioned to evaluate these documents for their particular application before citing them as a replacement document.