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The DFT® Excalibur Silent Check Valve is a spring-assisted, center guided, in-line, check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, gasket, seat, spring, disc with stem and guide bushing. Excalibur check valves are available in a wide range of sizes and pressure ratings and in a variety of metals to meet most check valve requirements.
Unit of Measure

Specifications

Series

 N/A Excalibur®

ASME CLASS

 N/A 900

Size

 N/A 3.00 inDN 80

Dimension A

 N/A 15 in381 mm

Dimension B

 N/A 9.50 in241 mm

Weight

 N/A 155 lb70.3 kg

Cracking Pressure CP

 N/A 0.015 bar0.22 psig
ENDS1 N/A FLG (RF)

Cv

 N/A 138

Materials of Construction

Body

 N/A A351 CF8M

Body Material

 N/A Stainless Steel

Disc/Stem Assembly

 N/A A351 CF8M/A479 316
Seat2 N/A A351 CF8M
Spring3 N/A A313 316

Bushing

 N/A A479 316
Bolting4 N/A A193-B7 (Stud) & A194-2H (Nut)
Gasketing5 N/A 316 Spiral wound with Flexible Graphite Filler

Trim

 N/A A351 CF8M/316 SS

Available Soft Seat Materials

Available Soft Seat Materials6 N/A Buna-N (-70 to 250°F) EPDM (-75 to 300°F) TFE®-Viton® (-40 to 400°F) Viton® (-40 to 400°F) Zelon® (37 to 470°F)

Codes and Standards

ANSI

 N/A B16.10 B16.20 B16.25 B16.34 B16.5

MSS

 N/A SP-126 SP-25 SP-6 SP-61
ASTM7 N/A A216GR WCB A351GR CF8M

Features

N/A

  • ASME B16.10 Face-to-Face dimensions
  • Spring-assisted silent closing, non-slam
  • 2" to 24" Line size
  • ASME 150 to 1500
  • WCB & SS bodies
  • SS trim
  • Ends:
    - RF Flanged
    - RTJ
  • Center guided
  • Dual guided stem
  • Horizontal or vertical installation
  • Tight shut-off
  • Two piece body
  • Protected spring
  • Easy maintenance
  • Versatile
  • Axial flow
  • Nozzle style

Options

Options

 N/A
  • Soft seat
  • Inconel® X-750 Spring
  • Custom sizing - low flow
  • Severe service trim
  • Body Materials:
    - Alloy 20
    - Hastelloy®
    - Inconel® 600
    - Monel
  • Stellited trim (600°F+)
  • Ends:
    - Butt weld
    - Flanged x Butt weld
    - Victaulic®
  • NACE

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

Inventory

Inventory

 N/A {0}
  • 1 Consult DFT for availability
  • 2 Soft seats are available for bubble-tight shutoff.
  • 3 Inconel® 750 spring is available.
  • 4 Contact DFT for stainless steel or other bolting materials.
  • 5 Contact DFT for other gasket materials.
    CFG - 316 graphite material.
  • 6 TFE-Viton : Teflon Encapsulated Viton
  • 7 Contact DFT for NACE.