The TLW® Check Valve (Tapped Lug Wafer) was engineered for applications where exposed studs are not suitable. This non-slam spring-assisted, center-guided, lugged pattern wafer check valve is designed to prevent water hammer and reverse flow. The lightweight compact design fits between mating flanges and meets API 594 face-to-face dimensions. The TLW® Check Valve body design eliminates potential leak paths to the environment and is an easy-to-maintain check valve for applications involving liquids, gases, or steam. Tapped holes are provided in the body for lifting lugs to assist with installation (10" and larger sizes only).
Prod. # |
ASME CLASS |
Size |
Cracking Pressure CP |
Body |
ENDS |
Cv |
|---|---|---|---|---|---|---|
| 422H1A4A5 | ASME CLASS N/A 150 | Size N/A 2.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 120 |
| 422H1B4A5 | ASME CLASS N/A 300 | Size N/A 2.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 120 |
| 425H1A4A5 | ASME CLASS N/A 150 | Size N/A 2.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 120 |
| 425H1B4A5 | ASME CLASS N/A 300 | Size N/A 2.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 120 |
| 422J1A4A5 | ASME CLASS N/A 150 | Size N/A 2.50 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 205 |
| 422J1B4A5 | ASME CLASS N/A 300 | Size N/A 2.50 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 205 |
| 425J1A4A5 | ASME CLASS N/A 150 | Size N/A 2.50 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 205 |
| 425J1B4A5 | ASME CLASS N/A 300 | Size N/A 2.50 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 205 |
| 422K1A4A5 | ASME CLASS N/A 150 | Size N/A 3.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 260 |
| 422K1B4A5 | ASME CLASS N/A 300 | Size N/A 3.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 260 |
| 425K1A4A5 | ASME CLASS N/A 150 | Size N/A 3.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 260 |
| 425K1B4A5 | ASME CLASS N/A 300 | Size N/A 3.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 260 |
| 422L1A4A5 | ASME CLASS N/A 150 | Size N/A 4.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 430 |
| 422L1B4A5 | ASME CLASS N/A 300 | Size N/A 4.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 430 |
| 425L1A4A5 | ASME CLASS N/A 150 | Size N/A 4.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 430 |
| 425L1B4A5 | ASME CLASS N/A 300 | Size N/A 4.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 430 |
| 422N1A4A5 | ASME CLASS N/A 150 | Size N/A 6.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 825 |
| 422N1B4A5 | ASME CLASS N/A 300 | Size N/A 6.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 825 |
| 425N1A4A5 | ASME CLASS N/A 150 | Size N/A 6.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 825 |
| 425N1B4A5 | ASME CLASS N/A 300 | Size N/A 6.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 825 |
| 422O1A4A5 | ASME CLASS N/A 150 | Size N/A 8.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 1310 |
| 422O1B4A5 | ASME CLASS N/A 300 | Size N/A 8.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 1310 |
| 425O1A4A5 | ASME CLASS N/A 150 | Size N/A 8.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 1310 |
| 425O1B4A5 | ASME CLASS N/A 300 | Size N/A 8.00 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A351 CF8M | ENDS N/A Wafer (RF) | Cv N/A 1310 |
| 422P1A4A5 | ASME CLASS N/A 150 | Size N/A 10.0 in | Cracking Pressure CP N/A 0.034 bar0.5 psig | Body N/A A216 WCB | ENDS N/A Wafer (RF) | Cv N/A 1875 |
