Modine 5H0547510021 Orifice R-407C the main valve diaphragm is

the main valve diaphragm is the first part to inspect for pinholes or deformation

Can I use this for a liquid propane (LP) conversion

Reduced Operational Noise: Corrects "thumping" sounds or intermittent startup issues common in failing motor modules

Common Questions & Technical Support Is the 60L27 compatible with both R-22 and R-410A

Modine 5H0547510021 Orifice R-407C the main valve diaphragm isThe Modine 5H0547510021 Orifice is a precision engineered Natural Gas Main Orifice designed for consistent gas flow regulation in commercial and industrial Modine heating units. As a critical component in the burner manifold assembly, this orifice is calibrated to maintain the specific manifold pressure required for efficient combustion and clean flame characteristics. Built from high grade, corrosion resistant brass, it ensures long term reliability