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Find My Check Valve
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.
Unit of Measure

Inventory

Inventory

Specifications

Series

 ALC®

Size

 2.50 inDN 65

Cold Working Pressure

 740 psig51.06 barg

Working Steam Pressure

 620 psig

ASME CLASS

 150 300

Dimension A

 2.62 in67 mm

Dimension B

 5 in127 mm

B (Dia.)

 5 in127 mm

Weight

 7.5 lb3.4 kg

Cracking Pressure CP

 0.69 psig0.048 bar

ENDS

 Wafer (RF)

Temperature Rating

 37 to 450 ºF

Cv

 205

Materials of Construction

Body1 A216 Grade WCB

Body Material

 Carbon Steel

Disc/Stem Assembly

 316 SS/Nitronic 60

Trim

 316 SS

Seat

 Zelon®
Spring2 Inconel® X-750
Bushing3 A479 316
Gasketing4 CFG (Corrugated Flexible 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