7" 90 Degree Oval Elbow Duct Fitting, Vertical

Lukjan Oval Vertical Elbow — Series 6033, 7″, 90° (6-7/8″ L × 9-1/2″ W)

A vertical oval duct elbow used in HVAC systems to turn airflow direction by 90°, while maintaining an oval cross-section. The Series 6033 model with a 7″ nominal size transitions the duct path vertically (up/down) while retaining the oval profile.

• Series / model: 6033 (Lukjan oval vertical elbows) — also marketed under Snappy 6033-7 variant :contentReference[oaicite:0]{index=0}
• Nominal size: 7 inch (refers to the nominal diameter / “size” class of the oval) :contentReference[oaicite:1]{index=1}
• Angle: 90° (right angle elbow) :contentReference[oaicite:2]{index=2}
• Length (throat / depth): 6-7/8 inches :contentReference[oaicite:3]{index=3}
• Width (major dimension / across the oval opening): 9-1/2 inches :contentReference[oaicite:4]{index=4}
• Material: Steel (hot-dip galvanized or G30 / G-series coating) :contentReference[oaicite:5]{index=5}
• Gauge / Thickness: Typically 30 gauge steel for sheet metal HVAC fittings (common in oval duct fittings) :contentReference[oaicite:6]{index=6}
• Finish: Galvanized (for corrosion protection) :contentReference[oaicite:7]{index=7}
• Weight (approx): 0.50 lb :contentReference[oaicite:8]{index=8}
• Part / MPN: OX5407 (for the 7" vertical oval elbow) :contentReference[oaicite:9]{index=9}
• Applications:
  • Used in HVAC duct systems to route air in vertical direction changes while maintaining oval duct cross-sections (e.g. up or down changes in layout).
  • Compatible with oval duct and fittings of the same series / size for seamless transitions and minimal turbulence.
• Installation notes:
  • Use proper joining methods (sheet-metal screws, rivets, or cleats) and seal all seams (foil tape, mastic) to minimize leakage.
  • Align the elbow properly to avoid internal turbulence or kinks in the airflow path.
  • Check that the adjacent ductwork dimensions match the oval profile for smooth transitions.

Technical & Performance Notes

• The oval shape helps reduce height or width constraints compared to round elbows while preserving cross-sectional area for airflow.
• Because the width (9-1/2″) is relatively large compared to the nominal 7″, velocity variation may occur—proper sizing and system balancing is advised.
• The relatively short depth (6-7/8″) keeps the elbow compact, reducing the space requirement for routing changes.
• Galvanized steel construction provides durability in typical indoor HVAC environments; periodic inspection is recommended in humid or aggressive settings.
• When installed properly in a system with matching oval ductwork, airflow losses should be modest; however, care should be taken to avoid sharp bends before or after the elbow to reduce pressure drop.