The TLW Check Valve (Tapped Lug Wafer) was engineered for applications where exposed bolts 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).

All temperature ratings are for standard valves.

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Prod. #

Class

Size

Dimension A

Dimension B

Cv

Cracking Pressure CP

Body

422H1A4A5 N/A 150 N/A 2 in N/A 2.38 in60 mm N/A 6.00 in152.40 mm N/A 120 N/A 0.5 psig0.034 bar N/A A216 WCB
422H1B4A5 N/A 300 N/A 2 in N/A 2.38 in60 mm N/A 6.50 in165.10 mm N/A 120 N/A 0.5 psig0.034 bar N/A A216 WCB
425H1A4A5 N/A 150 N/A 2 in N/A 2.38 in60 mm N/A 6.00 in152.40 mm N/A 120 N/A 0.5 psig0.034 bar N/A A351 CF8M
425H1B4A5 N/A 300 N/A 2 in N/A 2.38 in60 mm N/A 6.50 in165.10 mm N/A 120 N/A 0.5 psig0.034 bar N/A A351 CF8M
422J1A4A5 N/A 150 N/A 2.5 in N/A 2.62 in67 mm N/A 7.00 in177.80 mm N/A 205 N/A 0.5 psig0.034 bar N/A A216 WCB
422J1B4A5 N/A 300 N/A 2.5 in N/A 2.62 in67 mm N/A 7.50 in190.50 mm N/A 205 N/A 0.5 psig0.034 bar N/A A216 WCB
425J1A4A5 N/A 150 N/A 2.5 in N/A 2.62 in67 mm N/A 7.00 in177.80 mm N/A 205 N/A 0.5 psig0.034 bar N/A A351 CF8M
425J1B4A5 N/A 300 N/A 2.5 in N/A 2.62 in67 mm N/A 7.50 in190.50 mm N/A 205 N/A 0.5 psig0.034 bar N/A A351 CF8M
422K1A4A5 N/A 150 N/A 3 in N/A 2.88 in73 mm N/A 7.50 in190.50 mm N/A 260 N/A 0.5 psig0.034 bar N/A A216 WCB
422K1B4A5 N/A 300 N/A 3 in N/A 2.88 in73 mm N/A 8.25 in209.55 mm N/A 260 N/A 0.5 psig0.034 bar N/A A216 WCB
425K1A4A5 N/A 150 N/A 3 in N/A 2.88 in73 mm N/A 7.50 in190.50 mm N/A 260 N/A 0.5 psig0.034 bar N/A A351 CF8M
425K1B4A5 N/A 300 N/A 3 in N/A 2.88 in73 mm N/A 8.25 in209.55 mm N/A 260 N/A 0.5 psig0.034 bar N/A A351 CF8M
422L1A4A5 N/A 150 N/A 4 in N/A 2.88 in73 mm N/A 9.00 in228.60 mm N/A 430 N/A 0.5 psig0.034 bar N/A A216 WCB
422L1B4A5 N/A 300 N/A 4 in N/A 2.88 in73 mm N/A 10.00 in254.00 mm N/A 430 N/A 0.5 psig0.034 bar N/A A216 WCB
425L1A4A5 N/A 150 N/A 4 in N/A 2.88 in73 mm N/A 9.00 in228.60 mm N/A 430 N/A 0.5 psig0.034 bar N/A A351 CF8M
425L1B4A5 N/A 300 N/A 4 in N/A 2.88 in73 mm N/A 10.00 in254.00 mm N/A 430 N/A 0.5 psig0.034 bar N/A A351 CF8M
422N1A4A5 N/A 150 N/A 6 in N/A 3.88 in99 mm N/A 11.00 in279.40 mm N/A 825 N/A 0.5 psig0.034 bar N/A A216 WCB
422N1B4A5 N/A 300 N/A 6 in N/A 3.88 in99 mm N/A 12.50 in317.50 mm N/A 825 N/A 0.5 psig0.034 bar N/A A216 WCB
425N1A4A5 N/A 150 N/A 6 in N/A 3.88 in99 mm N/A 11.00 in279.40 mm N/A 825 N/A 0.5 psig0.034 bar N/A A351 CF8M
425N1B4A5 N/A 300 N/A 6 in N/A 3.88 in99 mm N/A 12.50 in317.50 mm N/A 825 N/A 0.5 psig0.034 bar N/A A351 CF8M
422O1A4A5 N/A 150 N/A 8 in N/A 5.00 in127 mm N/A 13.50 in342.90 mm N/A 1310 N/A 0.5 psig0.034 bar N/A A216 WCB
422O1B4A5 N/A 300 N/A 8 in N/A 5.00 in127 mm N/A 15.00 in381.00 mm N/A 1310 N/A 0.5 psig0.034 bar N/A A216 WCB
425O1A4A5 N/A 150 N/A 8 in N/A 5.00 in127 mm N/A 13.50 in342.90 mm N/A 1310 N/A 0.5 psig0.034 bar N/A A351 CF8M
425O1B4A5 N/A 300 N/A 8 in N/A 5.00 in127 mm N/A 15.00 in381.00 mm N/A 1310 N/A 0.5 psig0.034 bar N/A A351 CF8M
422P1A4A5 N/A 150 N/A 10 in N/A 5.75 in146 mm N/A 16.00 in406.40 mm N/A 1875 N/A 0.5 psig0.034 bar N/A A216 WCB
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