| MEA | COMPONENT | MMATERIAL | NUI |
| 1 | NUT UNION | U-PVC | 1 |
| 2 | HOPE HOPE | U-PVC | 1 |
| 3 | O-NAKUAI | EPDM·NBR·FPM | 1 |
| 4 | PUKA | HAAWINA OLE | 1 |
| 5 | PISTON | U-PVC | 1 |
| 6 | PALAPALA | EPDM·NBR·FPM | 1 |
| 7 | KINO | U-PVC | 1 |
| NUI | NPT | BSPT | BS | ANSI | DIN | JIS | |||
| Thd./in | d1 | d1 | d1 | d1 | D | L | H | ||
| 25mm (1") | 11.5 | 11 | 34 | 33.4 | 32 | 32 | 45.4 | 130 | 69.2 |
| 40mm (1½") | 11.5 | 11 | 48 | 48.25 | 50 | 48 | 61 | 172.2 | 89 |
| 50mm (2") | 11.5 | 11 | 60 | 60.3 | 63 | 60 | 75 | 162.5 | 96.7 |
ʻO kahi wehewehe kikoʻī o ka valve check:
ʻO nā pahu hoʻopaʻa he mau kiwi ʻakomi, ʻike ʻia hoʻi ʻo nā valve check, nā kiwi ala hoʻokahi, nā kiwi hoʻihoʻi a i ʻole nā vala kaʻawale.Hoʻokaʻawale ʻia ka neʻe ʻana o ka diski i ke ʻano hāpai a me ke ʻano kowali.Ua like ke ʻano o ka pahu hoʻokiʻekiʻe me ka pahu pani pani, akā ʻaʻole i loaʻa ke kumu pahu e hoʻokele ai i ka disc.Kahe ka waena mai ka welau komo (ʻaoʻao lalo) a kahe mai ka hopena puka (ʻaoʻao luna).Keʻoi aku ka nui o ke kaomi inlet ma mua o ka huina o ke kaumaha o ka diski a me kona kūpaʻa kahe, wehe ʻia ka valve.ʻO ka mea ʻē aʻe, ua pani ʻia ka valve i ka wā e hoʻi ai ka mea waena.He diski ko ka swing check valve a hiki ke ho'ololi a puni ke axis, a ua like ke kumu hana me ko ka lift check valve.Hoʻohana pinepine ʻia ka valve check ma ke ʻano he valve lalo o ka mea pahū e pale ai i ke kahe hope o ka wai.ʻO ka hui pū ʻana o ka valve check a me ka valve stop hiki ke pāʻani i ka hana o ka hoʻokaʻawale palekana.ʻO ka hemahema ʻo ia ka nui o ke kū'ē a maikaʻi ʻole ka hana sealing ke pani ʻia.