| Yam khoom | COMPONENT | MMATERIAL | QUANTITY |
| 1 | UNION NTAWM | U-PVC | 1 |
| 2 | THOV CONNECTOR | U-PVC | 1 |
| 3 | O-RING | EPDM · NBR · FPM | 1 |
| 4 | Caij nplooj ntoos hlav | STAUNLESS STEEL | 1 |
| 5 | PISTON | U-PVC | 1 |
| 6 | GASKET | EPDM · NBR · FPM | 1 |
| 7 | Lub cev | U-PVC | 1 |
| SIZE | NPT | BSPT | BS | ANSI | DIN | JIS | |||
| Thd./ib | d1 | d1 | d1 | d1 | D | L | H | ||
| 25mm (1 ") | 11.5 | 11 | 34 | 33.4 ib | 32 | 32 | 45.4 ib | 130 | 69.2 ib |
| 40mm (1½ ") | 11.5 | 11 | 48 | 48.25 Nws | 50 | 48 | 61 | 172.2 ib | 89 |
| 50mm (2 ") | 11.5 | 11 | 60 | 60.3 | 63 | 60 | 75 | 162.5 ib | 96.7 ua |
Cov lus piav qhia ntxaws ntawm lub check valve:
Kos li qub yog tsis siv neeg li qub, tseem hu ua check li qub, ib-txoj kev li qub, rov qab li qub los yog cais li qub.Lub zog ntawm lub disc muab faib ua hom nqa thiab viav vias hom.Lub tshuab nqa lub valve zoo ib yam hauv cov qauv rau lub kaw-off valve, tab sis tsis muaj lub valve qia uas tsav lub disc.Qhov nruab nrab ntws los ntawm qhov kawg inlet (sab qis) thiab ntws tawm ntawm qhov hluav taws xob kawg (sab sauv).Thaum lub siab nkag siab ntau dua qhov sib npaug ntawm qhov hnyav ntawm lub disc thiab nws cov dej tsis kam, lub valve qhib.Ntawm qhov tsis sib xws, lub valve raug kaw thaum nruab nrab ntws rov qab.Lub viav vias kos valve muaj lub disc uas yog inclined thiab tuaj yeem tig ib ncig ntawm lub axis, thiab lub hauv paus ntsiab lus ntawm kev ua haujlwm zoo ib yam li lub tshuab nqa nqa.Lub check valve feem ntau yog siv los ua lub hauv qab valve ntawm lub twj tso kua mis los tiv thaiv cov dej rov qab.Kev sib xyaw ntawm cov tshev valve thiab nres valve tuaj yeem ua lub luag haujlwm ntawm kev sib cais kev nyab xeeb.Qhov tsis zoo yog qhov tsis kam yog qhov loj thiab qhov kev sib khi ua haujlwm tsis zoo thaum kaw.