Lennox 98L31 Natural Orifice
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Lennox 98L31 Natural Orifice

Lennox 98L31 Natural Orifice

The Lennox 98L31 is a precision-engineered natural gas burner orifice designed to regulate fuel flow and ensure stoichiometric combustion in high-efficiency heating systems. Featuring a .0890 drill size and standard 1/8-27 NPT threads, this brass burner orifice serves as a critical component for technicians performing manifold adjustments or gas-type conversions on compatible Lennox furnaces and boilers. The Lennox LB-99216 specification ensures that the orifice diameter is accurately sized to match specific BTU input requirements, preventing issues such as under-firing or hazardous over-firing conditions.

For veteran contractors, the Lennox 98L31 offers a reliable solution for maintaining optimal manifold pressure and heat exchanger performance. Its durable brass construction resists corrosion and thermal fatigue, common in high-heat burner environments. Whether you are replacing a clogged part or configuring a new installation, using this OEM Lennox replacement part guarantees that the flame geometry and gas-to-air mixture remain within the manufacturer's operational parameters, maximizing the AFUE rating of the system.

Key Benefits:
  • Precision .0890 Drill Diameter: Specifically sized for natural gas applications to maintain accurate BTU delivery.
  • Heavy-Duty Brass Construction: Resists the corrosive effects of fuel contaminants and high-temperature oxidation.
  • 1/8-27 NPT Threading: Provides a secure, leak-proof fit for standard furnace manifold assemblies.
  • OEM Compatibility: Replaces Lennox LB-99216 and fits popular models such as the SGH060 and KGA092.
  • Optimal Combustion: Ensures clean ignition and consistent flame crossover for improved system reliability.
Common Questions:

Is the Lennox 98L31 compatible with Propane (LP) conversions?
No, this orifice is specifically drilled to .0890 for natural gas applications. Propane conversions require a significantly smaller drill size due to the higher energy density of the fuel. Always verify your manifold pressure and gas type before installation.

Can I use this orifice on other HVAC brands?
While the 1/8-27 NPT thread is a common standard, the flow rate is calibrated for specific Lennox burner designs. Always consult the unit's rating plate and technical manual to ensure the drill size matches the required BTU per burner.

How do I prevent gas leaks during installation?
Clean the manifold threads thoroughly and apply a small amount of gas-rated pipe dope or yellow PTFE tape to the male threads of the Lennox 98L31, ensuring no sealant enters the orifice opening to prevent blockage.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

$9.93

Original: $28.38

-65%
Lennox 98L31 Natural Orifice

$28.38

$9.93

Lennox 98L31 Natural Orifice

The Lennox 98L31 is a precision-engineered natural gas burner orifice designed to regulate fuel flow and ensure stoichiometric combustion in high-efficiency heating systems. Featuring a .0890 drill size and standard 1/8-27 NPT threads, this brass burner orifice serves as a critical component for technicians performing manifold adjustments or gas-type conversions on compatible Lennox furnaces and boilers. The Lennox LB-99216 specification ensures that the orifice diameter is accurately sized to match specific BTU input requirements, preventing issues such as under-firing or hazardous over-firing conditions.

For veteran contractors, the Lennox 98L31 offers a reliable solution for maintaining optimal manifold pressure and heat exchanger performance. Its durable brass construction resists corrosion and thermal fatigue, common in high-heat burner environments. Whether you are replacing a clogged part or configuring a new installation, using this OEM Lennox replacement part guarantees that the flame geometry and gas-to-air mixture remain within the manufacturer's operational parameters, maximizing the AFUE rating of the system.

Key Benefits:
  • Precision .0890 Drill Diameter: Specifically sized for natural gas applications to maintain accurate BTU delivery.
  • Heavy-Duty Brass Construction: Resists the corrosive effects of fuel contaminants and high-temperature oxidation.
  • 1/8-27 NPT Threading: Provides a secure, leak-proof fit for standard furnace manifold assemblies.
  • OEM Compatibility: Replaces Lennox LB-99216 and fits popular models such as the SGH060 and KGA092.
  • Optimal Combustion: Ensures clean ignition and consistent flame crossover for improved system reliability.
Common Questions:

Is the Lennox 98L31 compatible with Propane (LP) conversions?
No, this orifice is specifically drilled to .0890 for natural gas applications. Propane conversions require a significantly smaller drill size due to the higher energy density of the fuel. Always verify your manifold pressure and gas type before installation.

Can I use this orifice on other HVAC brands?
While the 1/8-27 NPT thread is a common standard, the flow rate is calibrated for specific Lennox burner designs. Always consult the unit's rating plate and technical manual to ensure the drill size matches the required BTU per burner.

How do I prevent gas leaks during installation?
Clean the manifold threads thoroughly and apply a small amount of gas-rated pipe dope or yellow PTFE tape to the male threads of the Lennox 98L31, ensuring no sealant enters the orifice opening to prevent blockage.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

Product Information

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Description

The Lennox 98L31 is a precision-engineered natural gas burner orifice designed to regulate fuel flow and ensure stoichiometric combustion in high-efficiency heating systems. Featuring a .0890 drill size and standard 1/8-27 NPT threads, this brass burner orifice serves as a critical component for technicians performing manifold adjustments or gas-type conversions on compatible Lennox furnaces and boilers. The Lennox LB-99216 specification ensures that the orifice diameter is accurately sized to match specific BTU input requirements, preventing issues such as under-firing or hazardous over-firing conditions.

For veteran contractors, the Lennox 98L31 offers a reliable solution for maintaining optimal manifold pressure and heat exchanger performance. Its durable brass construction resists corrosion and thermal fatigue, common in high-heat burner environments. Whether you are replacing a clogged part or configuring a new installation, using this OEM Lennox replacement part guarantees that the flame geometry and gas-to-air mixture remain within the manufacturer's operational parameters, maximizing the AFUE rating of the system.

Key Benefits:
  • Precision .0890 Drill Diameter: Specifically sized for natural gas applications to maintain accurate BTU delivery.
  • Heavy-Duty Brass Construction: Resists the corrosive effects of fuel contaminants and high-temperature oxidation.
  • 1/8-27 NPT Threading: Provides a secure, leak-proof fit for standard furnace manifold assemblies.
  • OEM Compatibility: Replaces Lennox LB-99216 and fits popular models such as the SGH060 and KGA092.
  • Optimal Combustion: Ensures clean ignition and consistent flame crossover for improved system reliability.
Common Questions:

Is the Lennox 98L31 compatible with Propane (LP) conversions?
No, this orifice is specifically drilled to .0890 for natural gas applications. Propane conversions require a significantly smaller drill size due to the higher energy density of the fuel. Always verify your manifold pressure and gas type before installation.

Can I use this orifice on other HVAC brands?
While the 1/8-27 NPT thread is a common standard, the flow rate is calibrated for specific Lennox burner designs. Always consult the unit's rating plate and technical manual to ensure the drill size matches the required BTU per burner.

How do I prevent gas leaks during installation?
Clean the manifold threads thoroughly and apply a small amount of gas-rated pipe dope or yellow PTFE tape to the male threads of the Lennox 98L31, ensuring no sealant enters the orifice opening to prevent blockage.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

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