Technicians favor this model for its pilot-operated diaphragm design

The weights are rated for temperatures up to 150°F (66°C)

Fail-Safe Operation: The spring-return mechanism ensures the damper reverts to a default position during power interruptions

ODF sweat connections: Copper extensions allow for torch-brazing without disassembly

By housing the delicate quartz fiber bundle

Resideo 45900446-052/B Venturi 323055-751 Technicians favor this model forProperly calibrate your gas control systems with the Resideo 45900446 052 B Venturi, a precision engineered manifold component designed to interface specifically with Honeywell VK41 and VK81 series gas valves. Built from high grade thermoplastic to withstand the rigors of industrial ventilation and gas distribution, this replacement venturi maintains consistent fluid dynamics and pressure differentials critical for high efficiency combustion.