Modine 5H0547510043 Orifice

The Modine 5H0547510043 Orifice is a high-precision, OEM replacement part engineered specifically for liquid propane (LP) gas regulation in Modine heating systems. This LP gas orifice is the current manufacturer-authorized direct replacement for 5H54751-43, ensuring seamless integration into existing burner manifolds without field modifications. It is designed for use across a wide range of popular unit heaters, including the PD, PA, PAE, and PDP series, covering specific BTU inputs such as the PD125 and PD175 models. As a critical component of the combustion system, this Modine replacement orifice controls the precise volume of fuel delivered to the burner, maintaining the 10-inch W.C. manifold pressure required for efficient thermal transfer and safe operation. Whether you are performing a propane conversion or replacing a fouled burner orifice, utilizing genuine Modine heater parts is essential for maintaining equipment certification and preventing soot buildup or improper combustion ratios in commercial and industrial HVACR applications.

Key Benefits:

• Matches exact specifications for Modine 5H0547510043, serving as the official 5H54751-43 replacement.
• Optimized for liquid propane (LP) applications to maintain stable flame characteristics in unit heaters.
• Compatible with a broad range of models, including PD125, PD175, PDP125, and PDP175 gas-fired units.
• Constructed from high-grade, corrosion-resistant brass to withstand high-temperature combustion environments.
• Ensures accurate BTU input regulation, critical for preventing heat exchanger fatigue and over-firing.

Common Questions:

Is the 5H0547510043 compatible with older 5H54751-43 installations?
Yes, this is the official OEM successor part. It maintains the same thread pitch and drill size specifications to provide a drop-in fit for older manifolds using the legacy part number.

Can this orifice be used for high-altitude propane conversions?
While this is a standard LP orifice, high-altitude installations (typically above 2,000 feet) may require specific derating kits. Always verify your local elevation requirements against the Modine technical bulletin before installation.

How do I ensure a gas-tight seal when replacing the orifice?
Technicians should seat the orifice into the manifold using a standard wrench until snug. Avoid over-torquing, which can damage the brass threads, and always perform a soap-bubble leak test on the connection point after restoring gas pressure.

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.