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The Butt Weld (B4, B8) check valve is a one piece body machined from bar stock, eliminating porosity concerns and providing uniform density for more consistent welds.

Made to ASME/ANSI B16.25 for schedule 40 pipe (B4), or schedule 80 pipe (B8) it carries rugged, dependable Check-All trim with a wide variety of seat materials and cracking pressures to choose from. The Butt Weld valve can also be used as a low pressure relief valve or vacuum breaker by using the desired spring settings.

1 - 1 of 1 Part Numbers
B4/B8 BUTT WELD VALVE
B4/B8 BUTT WELD VALVE
  • Valve Style - Schedule Pipe 40
  • Size - 1/2"
  • Body Material - Alloy 20
  • Seat Material - Aflas
  • Cracking Pressure - Standard Pressure: .125 psi
  • Spring Material - 316 Stainless Steel
  • Spring - Standard
1 - 1 of 1 Part Numbers

Specifications

Approvals & Certifications

  • ISO 9001

Approvals & Certifications

  • CE
  • PED 97/23/EC

Diameter

  • Orifice: 0.348” to 2.56” (8.63 to 65.02 mm)

Enclosure, Body Material

  • 316 Stainless Steel
  • 316L Stainless Steel
  • Alloy 20 or Incoloy
  • Alloy 400 or Monel
  • Alloy B
  • Alloy C-276 or Hastelloy
  • Carbon Steel
  • Monel

Flow Rate

  • 2.4 to 144 Cv

Media

  • Water

Pipe Size

  • 1/2” to 4” (12.7 to 101.6 mm)

Pressure Range

  • Non-Shock Pressure: psi: 1,500 to 5,000 (kPa: 10,342 to 34,500, bar: 103.4 to 345) at 37.7° C (100° F)

Seat / Seal Material

  • Seat: AFLAS
  • Seat: Buna-N
  • Seat: EPDM
  • Seat: Kalrez
  • Seat: Metal to Metal
  • Seat: Neoprene
  • Seat: PTFE
  • Seat: Viton

Spring Material

  • 316 Stainless Steel
  • AISI 631 Stainless Steel, 17-7 PH
  • Alloy 400 or Monel
  • Alloy B
  • Alloy C-276 or Hastelloy
  • Alloy X-750 (Inconel)
  • Fluorinated Ethylene Propylene (FEP)
  • Titanium

Tolerance

  • Spring Tolerance: ± 15 %

Welded Connection

  • 1” Butt Weld End
  • 1/2” Butt Weld End
  • 1-1/2” Butt Weld End
  • 1-1/4” Butt Weld End
  • 2” Butt Weld End
  • 2-1/2” Butt Weld End
  • 3” Butt Weld End
  • 3/4” Butt Weld End
  • 4” Butt Weld End

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