For very large ducts with high stratification

the 220 series typically does not contain internal relief

Flow Characterization: Equal percentage plug design optimizes heat exchanger efficiency across the entire stroke

Why is my horizontal vane not moving even after replacement

providing a cost-effective alternative to full valve replacement in demanding steam or chilled water environments

Tekmar Controls 356 Control 319847-401 For very large ducts withThe Tekmar Controls 356 Control is a sophisticated 24Vac Variable Speed Mixing Control engineered specifically for hydronic systems requiring precise outdoor temperature reset. A veteran tech knows that maintaining the right water temperature is non negotiable for radiant floor heating and commercial baseboard applications; this microprocessor based unit delivers exactly that by modulating the speed of a single permanent capacitor (wet rotor)