Honeywell Venturi tube VMU150A1003

The Honeywell VMU150A1003 is a venturi tube designed for premix burners with a nominal capacity of 150 kW. It enables smooth modulation of the burner by adjusting fan speed while maintaining a fixed 1:1 gas/air ratio. This component is intended for use with a fan and a Honeywell gas regulating valve, allowing load reduction down to 17% of maximum. It belongs to the category of boiler pipe fittings, specifically manifolds, and is identified by SKU VMU150A1003 or 534.833.903.

Parts of this type are selected by matching the thread type and size on each port, the sealing method (flat gasket, o-ring, or taper), and the pressure and temperature rating of the material. The port arrangement must align with the boiler's inlet and outlet connections, and the nominal heat output rating should correspond to the appliance's capacity. Always verify the required sealing components before ordering.