Ka nui maʻamau o ANSI-Standard check valves

ʻO kahoʻopaʻa pahui hoʻolālā ʻia, hana ʻia, hana ʻia a hoʻāʻo ʻia e like me ke kūlana ʻAmelika i kapa ʻia ʻo ke kūlana ʻAmelikahoʻopaʻa pahu, no laila he aha ka nui maʻamau o ke kūlana ʻAmelikahoʻopaʻa pahu? He aha ka ʻokoʻa ma waena o ia a me ka pahu pahu hōʻoia maʻamau? I kēia manawa, ka nui maʻamau o ka maʻamau ʻAmelikanā pahu hopuʻoi aku ka kaulana e hoʻolālā ʻia a hana ʻia e like me nā kūlana API a me ASME, a he nui nā kūlana valve maʻamau ʻAmelika i maʻamau i ka honua. ʻO nā ana maʻamau o ka American Standard check valves penei: Nā kūlana hoʻolālā: API 6D, ASME B16.34, API 594, BS 1868, GB/T 12235, GB/T 12236, JB/T 8937 Ka lōʻihi o ka hale: ASME B16.10 , API 6D, GB/T 12221 Nā kūlana pili: ASME B16.5, ASME B16.47, ASME B16.25, GB/T 9113, JB/T 79, HG/ T 20592 Hoʻāʻo puʻe: API 598, API 6D, GB/T 13927, GB/T 26480 Paʻi a me ka helu wela : ASME B16.34, GB/T 12224 ʻO ka hoʻohana ʻana i nā kīwaha honua maʻamau ʻAmelika i loko o nā kaiapuni kiʻekiʻe ʻO nā ʻokoʻa nui ma waena o ka maʻamau ʻAmelikanā pahu hopua me ka pae aupuninā pahu hopupenei: 1. Okoa ke anawaena o ka inoa; 2. He okoa ka kaha flange; 3. He okoa ka loihi o ka hale; 4. Heʻokoʻa nā koi nānā.