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Find My Check Valve
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

Inventory

Inventory

Specifications

Series

 ALC®

Size

 16.0 inDN 400

Cold Working Pressure

 720 psig49.68 barg

Working Steam Pressure

 495 psig

ASME CLASS

 300

Dimension A

 9.12 in231.6 mm

Dimension B

 21 in533.4 mm

B (Dia.)

 21 in533.4 mm

Weight

 430 lb195 kg

Cracking Pressure CP

 0.5 psig0.035 bar

ENDS

 Wafer (RF)

Temperature Rating

 -460 to 450 ºF

Cv

 4100

Materials of Construction

Body1 A351 CF8M

Body Material

 316 Stainless Steel

Disc/Stem Assembly

 316 SS/Nitronic 60

Trim

 316 SS

Seat

 316 SS
Spring2 Inconel® X-750
Bushing3 A479 316
Gasketing4 CFG (316SS/Graphite)

Available Soft Seat Materials

Available Soft Seat Materials5 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

 B1.1 B16.34 B16.5

MSS

 SP-25 SP-6 SP-61

ASTM

 A216GR WCB A351GR CF8M

Other

 API 594 API PED

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