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  • TLW® Wafer Check Valves
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  • TLW-Wafer-Check-Valve
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).
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ASME CLASS

Size (in)

Size (mm)

ENDS

Cv

Prod. #

ASME CLASS

Size

Cracking Pressure CP

Body

ENDS

Cv

422H1A4A5 N/A 150 N/A 2.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 120
422H1A4D5M01 N/A 150 N/A 2.0 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 120
422H1B4A5 N/A 300 N/A 2.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 120
425H1A4A5 N/A 150 N/A 2.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 120
425H1B4A5 N/A 300 N/A 2.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 120
422J1A4A5 N/A 150 N/A 2.50 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 205
422J1B4A5 N/A 300 N/A 2.50 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 205
425J1A4A5 N/A 150 N/A 2.50 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 205
425J1B4A5 N/A 300 N/A 2.50 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 205
422K1A4A5 N/A 150 N/A 3.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 260
422K1A4D5M01 N/A 150 N/A 3.0 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 260
422K1B4A5 N/A 300 N/A 3.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 260
425K1A4A5 N/A 150 N/A 3.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 260
425K1B4A5 N/A 300 N/A 3.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 260
422L1A4A5 N/A 150 N/A 4.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 430
422L1A4D5M01 N/A 150 N/A 4.0 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 430
422L1B4A5 N/A 300 N/A 4.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 430
425L1A4A5 N/A 150 N/A 4.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 430
425L1B4A5 N/A 300 N/A 4.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 430
422N1A4A5 N/A 150 N/A 6.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 825
422N1A4D5M01 N/A 150 N/A 6.0 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 825
422N1B4A5 N/A 300 N/A 6.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 825
425N1A4A5 N/A 150 N/A 6.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 825
425N1B4A5 N/A 300 N/A 6.00 in N/A 0.034 bar0.5 psig N/A A351 CF8M N/A Wafer (RF) N/A 825
422O1A4A5 N/A 150 N/A 8.00 in N/A 0.034 bar0.5 psig N/A A216 WCB N/A Wafer (RF) N/A 1310
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