FNW 681 3 in. Epoxy Coated Cast Iron Wafer Check Valve

FNW681M

$329.22 each

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Product Details

  • An internal spring closes valve just prior to an equalizing pressure on both sides providing a quiet and shock less valve closing
  • Designed for use with Class 125/150 flanges
  • Non-slam (spring actuated) check for water or clean fluids
  • Prevent water hammer in well pumps
  • Renewable disc
  • Replaceable drip tight resilient seat
  • Silent check valves were developed to eliminate water hammer due to water flow reversal in clear water pump applications
  • Use flat-faced metal flanges and full-face gaskets only
  • Valve opens when upstream pressure exceeds downstream pressure by 1/4 to 1/2 psi
  • Vertical or horizontal installation

Documents

Specifications

  • ANSI Specifications
    ANSI B16.1
  • API Specifications
    API 598
  • Coating
    Epoxy
  • Collection
    681
  • End Connection 1
    Wafer
  • End Connection 2
    Wafer
  • End Connections
    Wafer
  • Fitting Size 1
    3 in
  • Fitting Sizes
    3 in
  • Installation Type
    Horizontal Mount, Vertical Mount
  • Length
    3-1/8 in
  • MSS Specifications
    MSS SP-6
  • Material
    Cast Iron
  • Maximum Pressure
    200 psi
  • Maximum Temperature
    176
  • Minimum Temperature
    -4
  • NSF Certified
    No
  • Pressure Class
    125#
  • Recommended Valve Application
    Water
  • Temperature Range
    -4 to 176 Deg F
  • UL Listed
    No
  • Valve Body Style
    Wafer
  • Valve Disc Material
    Aluminum, Bronze
  • Valve Seat Material
    EPDM
  • Valve Size
    3 in
  • Valve Type
    Check Valve