| Yam | Ib feem | Muffysater | Qho ntau |
| 1 | Lub Txiv Ntseej | U-pvc | 1 |
| 2 | Kawg Connector | U-pvc | 1 |
| 3 | O-ntiv nplhaib | Epdm Elm Follm | 1 |
| 4 | Dej txhawv | Staunless steel | 1 |
| 5 | Piston | U-pvc | 1 |
| 6 | Gasket | Epdm Elm Follm | 1 |
| 7 | Lub cev | U-pvc | 1 |
| Qhov loj | Npt | Bspt | BS | Tus mob | 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 |
| 40 hli (1½ -) | 11.5 | 11 | 48 | 48.25 | 50 | 48 | 61 | 16.2 | 89 |
| 50 hli (2 ") | 11.5 | 11 | 60 | 60.3 | 63 | 60 | 75 | 162.5 | 96.7 |
Cov ncauj lus kom ntxaws ntawm lub check valve:
Saib xyuas li qub yog tsis siv neeg li qub, tseem hu ua screen li qub, ib-txoj kev li qub, rov ua li qub lossis cais li qub. Kev txav ntawm lub disc tau muab faib ua kev nqa hom thiab viav vias. Lub hau nqa tawm yog qhov zoo sib xws hauv cov qauv rau lub tshuab kaw, tab sis tsis muaj lub valve cov kav uas tsav lub disc. Lub nruab nrab ntws tawm hauv los ntawm inlet kawg (qis dua sab) thiab ntws tawm ntawm qhov hluav taws xob xaus (sab saud). Thaum lub inlet lub siab yog ntau dua li cov lej ntawm qhov hnyav ntawm lub disc thiab nws cov kev tawm tsam, lub valve tau qhib. On qhov tsis tooj, lub valve raug kaw thaum lub nruab nrab ntws rov qab. Lub viav vias kos valve muaj lub discined thiab tuaj yeem tig ncig lub axis, thiab tus ua haujlwm ua haujlwm zoo ib yam li ntawm kev nqa kos kos valve. Daim tshev hluav taws xob feem ntau siv raws li hauv qab valve ntawm cov cuab yeej ntxaij kom tiv thaiv tau cov dej nraub qaum. Kev sib xyaw ua ke ntawm kos valve thiab nres valve tuaj yeem ua si lub luag haujlwm ntawm kev nyab xeeb ntawm kev nyab xeeb. Qhov tsis zoo yog tias qhov kev tawm tsam yog loj thiab kev ua lag luam tsis zoo thaum kaw.