The Allanson 421-655-G is typically supplied with the standard mounting plate integrated for rapid field replacement on compatible burner housings

" ensuring accurate valve positioning and flow control

maintaining the hydraulic pressure ratings required for high-demand applications

provided the unit-side matches the 45M66 specifications

This gas pressure regulator is certified for use with both fuel types

Tjernlund Products 950-0471 Fan Prover Kit 319848-301 The Allanson 421-655-G is typicallyThe Tjernlund Products 950 0471 Fan Prover Kit is a critical safety interlock designed for commercial PAI series intake hoods and induction systems. As a veteran grade pressure switch kit, it serves as the primary mechanism to verify proper airflow before allowing the burner circuit to energize. This OEM Tjernlund 950 0471 assembly features a high precision diaphragm calibrated to 1. 35" WC PF, ensuring that the draft inducer or vent fan is moving