• Dart Union Bronze to Bronze Seat Union
  • Meets ASME B16.39 The standard union for most installations.
    • 3/8 - 2 NPS (10 - 50 DN) - 300lb (136 kg) steam working pressure at 450°F.
    • 3/8 - 2 NPS (10 - 50 DN) - 600lb (272 kg) cold water, gas, or oil pressure - non-shock.
  • Bronze Seat, on both sides of the joint. Resists corrosion.
  • True bearing surfaces, unlike ordinary union seats.
  • Bodies and nuts are high test air-refined malleable iron - generally superior to mild steel in most services.
  • Can be repeatedly installed and removed.
  • Straight way through. No cored parts to hold liquid or sediment.
  • Extra heavy shoulder on swivel end and in the nut to stand pipe strains, vibration, and wrench abuse.
  • Bronze seat ball joint, with extra wide seating surfaces.
Unit of Measure

NPS

N/A 2

DN

N/A 50

Dimension - A

N/A 3 5/8 inches

Dimension - A

N/A 92.00 mm

Dimension - B

N/A 2 7/8 inches

Dimension - B

N/A 73.00 mm

Dimension - C

N/A 4 1/16 inches

Dimension - C

N/A 103.00 mm

Dimension - D

N/A 4 5/8 inches

Dimension - D

N/A 117.00 mm

Weight (Black)

N/A 4.00 lbs

Weight (Black)

N/A 1.80 kg

Weight (Galv.)

N/A 4.20 lbs

Weight (Galv.)

N/A 1.90 kg