Sensus QR-S Damping Device 321702-401 Durable Construction: Cast iron body

Durable Construction: Cast iron body with brass trim provides superior resistance to mechanical wear

Smith 100144972 Fan Motor Assembly is a critical OEM component engineered for high-performance combustion and ventilation in commercial water heaters and boilers

providing the reliable high-limit and operating control required to maintain setpoint integrity

factory-set at 100 PSI

When used with compatible crank arm kits

Sensus QR-S Damping Device 321702-401 Durable Construction: Cast iron bodyThe Sensus QR S Damping Device is a purpose built mechanical component designed to optimize gas pressure regulator performance in high demand environments. Engineering teams developed this device to address the rapid ignition cycle requirements of modern high efficiency boilers, burners, and generators. When high efficiency equipment triggers an electronic ignition, the sudden draw can create significant negative pressure, often leading to excessive