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Small hexagonal malleable iron coupling with threaded ends, dark grey finish

Value Brand

Value Brand 1/4" Malleable Iron Coupling Class 300

SKU CH-YSRY-P69D8

Malleable iron pipe coupling rated Class 300 for 2000 psi at 150 °F and 300 psi saturated steam, meeting ASME B16.3 and B16.4 standards

  • Malleable iron construction meets ASME B 16.3 and B 16.4 standards
  • Class 300 rating handles 2000 psi at 150 °F for high-pressure systems
  • FM Approved and UL Listed for verified safety compliance
  • ASTM A-197 and ASTM A47 material specs ensure consistent quality
  • Operates from -20 °F to 550 °F across steam and fluid applications

Application

The Value Brand malleable iron coupling joins two pipes with 1/4 inch FNPT threads in plumbing systems. It suits installers who need a Class 300 rated fitting for water, oil or gas lines.

Pressure and temperature limits

Rated for 2000 psi at 150 degrees F and 300 psi saturated steam, the coupling operates from -20 degrees to 550 degrees F. These boundaries come from ASME B16.3 and B16.4 standards and the ASTM A197 and A47 material specifications.

Installation checklist

Verify that both pipe ends are cut and threaded to 1/4 inch FNPT before ordering. Confirm the system pressure and temperature stay within the rated range and that malleable iron is compatible with the conveyed fluid.

Highlights

  • Malleable iron construction meets ASME B 16.3 and B 16.4 standards
  • Class 300 rating handles 2000 psi at 150 °F for high-pressure systems
  • FM Approved and UL Listed for verified safety compliance
  • ASTM A-197 and ASTM A47 material specs ensure consistent quality
  • Operates from -20 °F to 550 °F across steam and fluid applications

Specifications

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Questions about this item

Should I pick the Class 300 coupling or a lower-class fitting for my piping system?

Choose the Class 300 coupling when your design requires a 300 psi saturated steam rating or up to 2000 psi at 150 °F; lower classes do not meet those pressure and temperature limits.

What does the 2000 psi rating mean once the coupling is installed in my system?

It is the maximum non-shock cold-working pressure at 150 °F; at higher temperatures the allowable pressure drops, so verify your operating conditions against the ASME B 16.3 pressure-temperature tables.

The coupling uses FNPT threads — what does that standard cap in practice?

FNPT follows ASME B 16.3 and B 16.4 taper-pipe threads, which seal by thread interference and limit the joint to the coupling’s 2000 psi / 300 psi steam ratings when properly assembled with sealant.

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