including R410A and R134a

Changing the pitch from the original 21 degrees will alter the amp draw on your HVAC condenser motor

repeatable valve automation

Technical Specifications: Optimized for 208-230 VAC

or the main burner fails to kick on despite the thermostat calling for heat

Siemens Building Technology 656-0018 Valve 318518-761 including R410A and R134aThe Siemens Building Technology 656 0018 is a professional grade 3 4" normally open angle valve engineered for the precise proportional control of steam, hot water, and chilled water. Built for terminal unit applications like fan coils, baseboards, and reheat coils, this 2 way pneumatic valve features a 4. 6 Cv flow coefficient and a 3 8 psi spring range. Maintenance is streamlined with a design that allows for stem repacking without a complete system