180307 Suburban Bruner Orifice (METRIC THREADS) #52

SF-30 30F (ABOVE SERIAL NO. 021206467) SF/SFVH-30Q/FQ

The Suburban 180307 Burner Orifice meters the correct LP gas flow into the burner tube on 30k BTU Suburban furnaces. Sized at #52, it is calibrated for the SF‑30 family’s BTU output and ensures proper ignition, stable flame shape, and clean combustion. The metric thread design is used on later‑production furnaces and all Q/FQ variants.

Correct thread type is critical—using a standard‑thread orifice in a metric burner assembly can cause cross‑threading, gas leaks, or improper seating.

Key Features

• OEM Suburban #52 LP burner orifice

• Metric threads for late‑production SF‑30 platforms

• Calibrated for 30k BTU furnace families

• Ensures proper flame shape, ignition reliability, and combustion stability

• Brass construction for clean, consistent metering

• Direct‑fit replacement for metric‑thread burner assemblies

When Technicians Replace This Orifice

• Yellow, lazy, or unstable flame

• Soot buildup in burner or exhaust

• Furnace failing to ignite or lighting inconsistently

• Incorrect BTU output or weak heating

• Orifice clogged with debris or contamination

• Burner assembly updated to metric‑thread spec

Compatibility

SF‑Series Furnaces:

• SF‑30 (units above serial no. 021206467)

• SF‑30F (units above serial no. 021206467)

• SF‑30Q

• SF‑30FQ

SFVH‑Series Furnaces:

• SFVH‑30Q

• SFVH‑30FQ

This is the correct OEM metric‑thread #52 orifice for all models listed above.