6" 90 Degree Oval Elbow Duct Fitting, Vertical

Lukjan Oval Vertical Elbow — Series 6033, 6″, 90° (6-3/4″ Length × 7-3/4″ Width)

A vertical oval duct elbow used in HVAC systems to change the direction of airflow by 90°, while maintaining an oval cross-section. The Series 6033 model for 6″ nominal oval duct delivers a compact right-angle transition with minimal flow interruption.

• Series / Model: 6033 (Lukjan Oval Vertical Elbow) — the same series used for 7″ elbows in Lukjan’s product line. :contentReference[oaicite:0]{index=0}
• Nominal size: 6 inch (refers to the nominal duct “size class” for oval fittings)
• Angle: 90° (right-angle elbow)
• Elbow length / depth (throat to exit): 6-3/4 inches (6.75″)
• Major width across oval opening: 7-3/4 inches (7.75″)
• Material: Galvanized steel (standard sheet metal fitting material) — common for Lukjan ductwork products. :contentReference[oaicite:1]{index=1}
• Sheet gauge (thickness): Likely 30 gauge (common for residential HVAC fittings)
• Finish: Hot-dip galvanized or galvanized steel finish for corrosion resistance
• Weight (approx): ~0.50 lb (expected, by analogy to the 7″ version) :contentReference[oaicite:2]{index=2}
• Part / MPN: Not confirmed for this exact dimension; for reference the 7″ version is Lukjan OX5407. :contentReference[oaicite:3]{index=3}
• Application: Used to route oval duct airflow in vertical direction changes (up/down) while preserving the oval cross-section and duct alignment
• Installation / connection:
  • Use sheet-metal joining methods (e.g. screws, rivets, cleats) at seams and flanges
  • Seal all seams with foil tape or duct mastic to reduce air leakage
  • Ensure that the adjoining duct sections match the oval profile to minimize turbulence and flow losses
  • Avoid sharp bends immediately before or after the elbow to reduce pressure drop and noise

Technical & Performance Notes

• Because the width (7.75″) is not far larger than the nominal size, the elbow preserves cross-sectional area relatively well, but care must be taken in system design to limit velocity and pressure losses.
• The relatively short length (6.75″) makes the elbow compact, which is beneficial where space is constrained, but may lead to tighter flow curvature — ensure system tolerances accommodate it.
• Galvanized steel construction offers durability in indoor HVAC environments; routinely inspect for corrosion in high-humidity or aggressive environments.
• Good practice includes rounding edges and deburring interior seams where possible to reduce turbulence and noise.
• Use matching Lukjan oval duct and fittings from the same series (6033) to maintain consistent fit, alignment, and structural integrity.