Emerson Alco 043330 Filter Drier 321702-401 By integrating the correct spring

By integrating the correct spring regulator and orifice sizes

but you must never use one with a lower voltage rating than the original specification

In a hydronic heating system

85" WC Calibration: Ensures accurate sensing of the critical pressure differential required for safe burner ignition

Emerson Alco 043330 Filter Drier 321702-401 By integrating the correct springThe Emerson Alco 043330 (Model BFK 163) is a high capacity bi directional liquid line filter drier engineered specifically for heat pump applications and reversible refrigeration cycles. Featuring a 16 cubic inch desiccant volume and 3 8" flare connections, this unit provides critical system protection by utilizing a solid core blend of molecular sieve and activated alumina to sequester moisture, acid, and solid contaminants. Rated for a 680 PSI