the 1178406 features a non-bleed design that ensures stable system pressures during the off-cycle

this assembly is strictly for chilled or hot water and glycol mixtures

it typically requires a minimum pressure drop (usually around 5 PSI) to lift the piston and maintain an open position

Is this sheave suitable for high-demand fractional horsepower applications

This assembly is designed for external mounting

Dwyer Instruments A-489 Mounting Flange 326070-701 the 1178406 features a non-bleedThe Dwyer A 489 Mounting Flange is a critical installation accessory designed for securing static pressure tips and sensors within HVAC ductwork. Engineered for durability and precision, this flange ensures a stable, leak proof mounting point for 4 inch straight static pressure sensors, allowing for accurate readings in high velocity airflow environments. Constructed from high grade materials, the A 489 is built to withstand industrial conditions,