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The ALC® is an in-line, spring assisted, center 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.

All temperature ratings are for standard valves.
Unit of Measure

Specifications

Series

 N/A ALC®

Size

 N/A 12.0 inDN 300

ASME CLASS

 N/A 150 300

Dimension A

 N/A 7.13 in181 mm

Dimension B

 N/A 16.38 in416 mm

B (Dia.)

 N/A 16.38 in416 mm

Weight

 N/A 200 lb90.7 kg

Cracking Pressure CP

 N/A 0.53 psig0.037 bar

ENDS

 N/A Wafer (RF)

Cv

 N/A 2525

Materials of Construction

Body1 N/A A216 Grade WCB

Body Material

 N/A Carbon Steel

Disc/Stem Assembly

 N/A 316 SS/Nitronic 60

Trim

 N/A 316 SS

Seat

 N/A Metal
Spring2 N/A Inconel® X-750
Bushing3 N/A A479 316
Gasketing4 N/A CFG (Corrugated Flexible Graphite)

Available Soft Seat Materials

Available Soft Seat Materials5 N/A Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 450ºF)

Codes and Standards

ANSI

 N/A B16.34 B16.5

MSS

 N/A SP-25 SP-6 SP-61

ASTM

 N/A A216GR WCB A351GR CF8M

Other

 N/A API 594

Features

N/A

  • API 594 Face-to-Face dimensions
  • Wafer RF ends
  • Spring-assisted silent closing
  • Horizontal or vertical installation
  • Sizes 2" thru 24"
  • ASME Class 150 and 300
  • Standard body materials:
    - A216 WCB
    - A351 CF8M
  • Stainless steel seat, disc & bushing
  • Nitronic 60 stem
  • Inconel® X-750 Spring
  • 0.5 psi cracking pressure spring
  • Seat Leakage per MSS SP-61
  • Tapped holes in body for lifting lugs
  • Axial flow
  • Nozzle style

Options

N/A

  • Body Materials:
    • Alloy 20
    • Hastelloy®
    • Others upon request
  • 316 SS spring
  • Custom sizing - low flow
  • Stellited trim
  • NACE
  • Soft-Seat

Application

N/A Autoclaves Boiler Feed & Discharge Chemical Lines Compressor Discharge Condensate Lines Cookers Cooling Towers Crude & Refined Product Lines Cryogenics Digester Evaporators Fly Ash System Generator Inlet & Discharge Hydraulic Lines Metering Pumps Mine Dewatering Nitrogen Purge Process Lines Pump Discharge Refrigeration Steam Lines Vacuum Breaker Water Lines Water Treatment

  • 1 Other Body Materials Available.
  • 2 316 SS Spring is Available.
  • 3 Teflon® bearing on 14", 16", 18", 20", and 24". Maximum Temperature 450º F.
  • 4 316/Graphite Material. Gaskets Only Used on Valves 10" and Larger
  • 5 Teflon Encapsulated Viton