York S1-9951-0981 Orifice

The York S1-9951-0981 Orifice is a precision-engineered OEM component designed for specific gas manifold configurations within York, Coleman, and Luxaire furnace assemblies. This #40 gas orifice features a strictly calibrated .098 drill size, ensuring the exact volumetric flow of fuel required for stable combustion and optimal thermal output. In field applications, technicians rely on the S1-9951-0981 technical specs to maintain proper manifold pressure and BTU input ratings, which are critical for preventing heat exchanger fatigue and ensuring clean ignition cycles. Machined from high-grade, heat-resistant brass, this furnace gas orifice resists thermal expansion and corrosion, maintaining its 0.098-inch bore diameter over thousands of heating cycles. Utilizing a genuine Johnson Controls replacement part ensures that the spray pattern remains centered within the burner tube, maximizing efficiency and reducing the risk of nuisance lockouts or carbon monoxide production associated with improperly sized aftermarket alternatives.

• OEM Standards: Manufactured to specific tolerances for York S1-9951-0981 compatibility, ensuring seamless integration into the burner manifold.
• Precise Metering: The #40 drill size provides a consistent 0.098-inch opening for accurate gas delivery.
• Durable Construction: Heavy-duty brass provides the necessary resistance to high-temperature furnace environments.

Common Questions

What is the specific diameter of the York S1-9951-0981?
This orifice is a #40 drill size, which translates to a decimal diameter of 0.098 inches.

Can I use this orifice for an LP conversion?
Orifice sizing depends on the altitude and the specific BTU requirements of the appliance; always refer to the manufacturer’s conversion chart before installing a 0.098 bore orifice for propane applications.

How do I verify if this orifice fits my furnace?
Check the rating plate of your unit for the orifice size requirement or match the S1-9951-0981 part number against your model's technical service manual.

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.