The ALC® is an in-line, spring assisted, single guided "wafer" check valve 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 ALC® 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" & larger only)

All temperature ratings are for standard valves.
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Prod. #

Class

Size

Dimension A

B (Dia.)

Cv

Cracking Pressure CP

Body

522L1B4A5 N/A 150/300 N/A DN 100 4 in N/A 2.88 in73 mm N/A 7 in178 mm N/A 430 N/A 0.5 psig0.034 bar N/A A216 WCB
525L1B4A5 N/A 150/300 N/A DN 100 4 in N/A 2.88 in73 mm N/A 7 in178 mm N/A 430 N/A 0.5 psig0.034 bar N/A A351 CF8M
522N1B4A5 N/A 150/300 N/A DN 150 6 in N/A 3.88 in99 mm N/A 10 in248 mm N/A 825 N/A 0.5 psig0.034 bar N/A A216 WCB
525N1B4A5 N/A 150/300 N/A DN 150 6 in N/A 3.88 in99 mm N/A 10 in248 mm N/A 825 N/A 0.5 psig0.034 bar N/A A351 CF8M
522O1B4A5 N/A 150/300 N/A DN 200 8 in N/A 5 in127 mm N/A 12 in305 mm N/A 1310 N/A 0.5 psig0.034 bar N/A A216 WCB
525O1B4A5 N/A 150/300 N/A DN 200 8 in N/A 5 in127 mm N/A 12 in305 mm N/A 1310 N/A 0.5 psig0.034 bar N/A A351 CF8M
522P1B4A5 N/A 150/300 N/A DN 250 10 in N/A 5.75 in146 mm N/A 14 in359 mm N/A 1875 N/A 0.5 psig0.034 bar N/A A216 WCB
525P1B4A5 N/A 150/300 N/A DN 250 10 in N/A 5.75 in146 mm N/A 14 in359 mm N/A 1875 N/A 0.5 psig0.034 bar N/A A351 CF8M
522R1B4A5 N/A 150/300 N/A DN 300 12 in N/A 7.12 in181 mm N/A 16 in419 mm N/A 2525 N/A 0.5 psig0.034 bar N/A A216 WCB
525R1B4A5 N/A 150/300 N/A DN 300 12 in N/A 7.125 in181 mm N/A 16 in419 mm N/A 2525 N/A 0.5 psig0.034 bar N/A A351 CF8M
522S1A4A5 N/A 150 N/A DN 350 14 in N/A 7.25 in184 mm N/A 17 in448 mm N/A 2950 N/A 0.5 psig0.034 bar N/A A216 WCB
522SIB4A5 N/A 300 N/A DN 350 14 in N/A 8.75 in222 mm N/A 19 in483 mm N/A 3275 N/A 0.5 psig0.034 bar N/A A216 WCB
525SIA4A5 N/A 150 N/A DN 350 14 in N/A 7.25 in184 mm N/A 17 in448 mm N/A 2950 N/A 0.5 psig0.034 bar N/A A351 CF8M
525SIB4A5 N/A 300 N/A DN 350 14 in N/A 8.75 in222 mm N/A 19 in483 mm N/A 3275 N/A 0.5 psig0.034 bar N/A A351 CF8M
522T1A4A5 N/A 150 N/A DN 400 16 in N/A 7.5 in191 mm N/A 20 in511 mm N/A 3330 N/A 0.5 psig0.034 bar N/A A216 WCB
522T1B4A5 N/A 300 N/A DN 400 16 in N/A 9.13 in232 mm N/A 21 in537 mm N/A 4100 N/A 0.5 psig0.034 bar N/A A216 WCB
525T1A4A5 N/A 150 N/A DN 400 16 in N/A 7.5 in191 mm N/A 20 in516 mm N/A 3330 N/A 0.5 psig0.034 bar N/A A351 CF8M
525T1B4A5 N/A 300 N/A DN 400 16 in N/A 9.125 in232 mm N/A 20 in516 mm N/A 4100 N/A 0.5 psig0.034 bar N/A A351 CF8M
522U1A4A5 N/A 150 N/A DN 450 18 in N/A 8 in203 mm N/A 22 in546 mm N/A 3475 N/A 0.5 psig0.034 bar N/A A216 WCB
522U1B4A5 N/A 300 N/A DN 450 18 in N/A 10.38 in264 mm N/A 23 in591 mm N/A 5040 N/A 0.5 psig0.034 bar N/A A216 WCB
525U1A4A5 N/A 150 N/A DN 450 18 in N/A 8 in203 mm N/A 22 in546 mm N/A 3475 N/A 0.5 psig0.034 bar N/A A351 CF8M
525U1B4A5 N/A 300 N/A DN 450 18 in N/A 10.375 in264 mm N/A 23 in591 mm N/A 5040 N/A 0.5 psig0.034 bar N/A A351 CF8M
522H1B4A5 N/A 150/300 N/A DN 50 2 in N/A 2.38 in60 mm N/A 4 in108 mm N/A 120 N/A 0.5 psig0.034 bar N/A A216 WCB
525H1B4A5 N/A 150/300 N/A DN 50 2 in N/A 2.38 in60 mm N/A 4 in108 mm N/A 120 N/A 0.5 psig0.034 bar N/A A351 CF8M
522W1A4A5 N/A 150 N/A DN 500 20 in N/A 8.62 in219 mm N/A 24 in603 mm N/A 3750 N/A 0.5 psig0.034 bar N/A A216 WCB
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