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Malleable iron 90-degree elbow with female NPT threads

Value Brand

Value Brand 90 Degree Elbow Class 300 1/4 in FNPT Malleable Iron

SKU CH-KF4Y-4RK4R

Malleable-iron 90-degree elbow with 1/4 in FNPT ends, rated Class 300 for 2000 psi at 150 °F and 300 psi saturated steam, meeting ASME B16.3, B16.4, ASTM A197 and A47 with FM and UL approvals

  • Malleable iron construction withstands 2000 psi at 150 °F
  • Class 300 rating handles saturated steam up to 300 psi
  • Operates reliably from -20 °F to 550 °F
  • ASME B 16.3 and B 16.4 compliance ensures dimensional accuracy
  • FM Approved and UL Listed for safety assurance

Malleable Iron 90 Degree Elbow Class 300

This Value Brand elbow provides a 90 degree change of direction in piping systems. It is built from malleable iron rated to Class 300 for demanding fluid handling. The FNPT connection suits 1/4 inch pipe threads. It meets ASME B16.3 and B16.4 standards.

Upgrading from lower class fittings

Replacing Class 150 or unrated elbows with this Class 300 fitting adds pressure margin for steam and hydraulic lines. The jump is worth it when design pressure approaches 300 psi saturated steam or 2000 psi at 150 degrees F. It also satisfies FM and UL listing requirements that basic fittings may lack.

Pressure and temperature headroom

The fitting handles saturated steam up to 300 psi and liquid service up to 2000 psi at 150 degrees F. Continuous operating range spans -20 to 550 degrees F per ASTM A197 and A47. It runs out when system pressure exceeds the Class 300 rating or temperatures surpass the listed maximum.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 80% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What thread size does the 1/4 in FNPT elbow require for a leak-free seal?

The elbow uses a 1/4 inch female NPT thread; wrap the male threads with PTFE tape or pipe dope and tighten two full turns past hand-tight to seat the taper properly.

Which wrench flats should I grip when tightening the Class 300 malleable-iron elbow?

Apply a pipe wrench to the hex flats on the elbow body — never on the pipe — and stop when the joint feels solid; over-torquing cracks the iron casting.

How often should I inspect the ASME B16.3 elbow in a saturated-steam line at 300 psi?

Check for leakage, corrosion or distortion at each scheduled shutdown; replace the fitting if threads show galling or the body shows pitting from condensate.

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