this fixed orifice assembly is designed for the management of both liquid and gas flow

Can I use this to replace part 86W18

Linear Control: Provides predictable flow modulation for accurate HVAC zoning and energy efficiency

Standardized Integration: Compatible with 120V electrical systems

For contractors performing HVAC repair on 90%+ AFUE systems

Aprilaire 5558 Humidistat 326070-701 this fixed orifice assembly isThe Aprilaire 5558 is a high performance Automatic Digital Modulating Control package engineered specifically for use with the Model 866 modulating steam humidifier. This modulating steam humidistat provides superior precision by utilizing a microcomputer based design and a proportional algorithm. Unlike standard on off controls, the 5558 delivers a 0 10VDC or 2 10VDC modulating output signal, allowing the humidifier to adjust its output based on the