Honeywell VMU680A1009, zwężka Venturiego 680 kW

Honeywell VMU680A 1009 venturi tube is a gas and air tube that allows smooth modulation of a premix burner with a fixed gas/air ratio when load is reduced to 17% of maximum. Designed to work in combination with a fan and a Honeywell gas regulating valve providing a 1:1 gas/air ratio. Smooth modulation is achieved by changing the fan speed. Venturi tube for 500 kW.