Resideo CPRD10 Damper 320735-701 A normally closed solenoid valve

A normally closed solenoid valve like the 8210G87 remains shut when de-energized and opens only when electrical power is applied to the coil

indicating internal restriction

maintaining identical electrical characteristics and physical dimensions

if signal is present but the load side of the relay is open

Its durable construction includes tamper-resistant bonnet screws and a thermo-bonded coated thermostat to prevent mineral buildup and maintain long-term performance

Resideo CPRD10 Damper 320735-701 A normally closed solenoid valveThe Resideo CPRD10 Damper is a 10 inch round constant pressure regulated bypass damper designed to maintain static pressure in multi zone HVAC systems. This barometric bypass damper uses a weighted blade mechanism to automatically compensate for changes in duct pressure as zone dampers open and close, ensuring consistent airflow and preventing coil freeze up or excessive noise. As a round bypass damper built for rigorous contractor use, the CPRD10