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Spare parts for gas and oil burners and boilers: gas valves, nozzles, ignition electrodes and transformers, pressure switches, flame detectors, fuel pumps, servomotors and burner control boxes.

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Over 100,000 part numbers from every major manufacturer, brought into one structure so that parts from different brands can be compared and replaced.

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Yes. The order number, the manufacturer model and any supplier code all lead to the same part, so a number from an old invoice or a nameplate is enough.

What if the part is discontinued?

The catalogue records what the manufacturer replaced it with, and which parts from other brands do the same job — together with the conditions that apply.

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Honeywell Venturi tube 45900446-055B

Photos

Key specifications

Capacity	16 gallons/hour
Modulation range	20–100 %
Gas-air mixing ratio	1:1
Mounting feature	flanged
Design features	compact and high-precision
Seals included	high-quality seals
Gas resistance	resistant to gas exposure
Function - fuel economy	reduces gas consumption
Operating principle	venturi

Capacity

16 gallons/hour

Modulation range

20–100 %

Gas-air mixing ratio

1:1

Mounting feature

flanged

Design features

compact and high-precision

Seals included

high-quality seals

Gas resistance

resistant to gas exposure

Function - fuel economy

reduces gas consumption

Operating principle

venturi

all specifications (9) ↓

Description

This venturi tube is a flanged boiler pipe fitting. It operates on the venturi principle to achieve a 1:1 mixing ratio of air and gas. With a capacity of 16 gallons/hour, it supports a modulation range of 20–100%. The compact, high-precision construction includes seals and is resistant to gas exposure. The design reduces gas consumption.

Choosing and fitting

Venturi tubes of this type are selected by matching the throat diameter and designed pressure drop to the burner's requirements, since the air-fuel ratio depends on these. The mounting style must fit the fan inlet connection. They are mounted between the gas valve and the burner fan inlet. Confirm that the tube is intended for the gas valve series in use, as these parts are often specific to a valve family. Before ordering, compare the original dimensions and flow characteristics with the replacement.

All specifications

Capacity	16 gallons/hour
Modulation range	20–100 %
Gas-air mixing ratio	1:1
Mounting feature	flanged
Design features	compact and high-precision
Seals included	high-quality seals
Gas resistance	resistant to gas exposure
Function - fuel economy	reduces gas consumption
Operating principle	venturi