Bl This standard establishes the interchangeability dimensions, characteristics and requirements that must be met by cast bronze steam valves, series 8.5 (commercially called class 125).
IRAM-IAP A 25-12-1961 history
1961IRAM-IAP A 25-12-1961 Argentina Petroleum Research Center gas-cast copper gate (half conditional size interchangeable type for 8.5 model)