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this element is the designated replacement for several legacy ECB29 series kits often found in older CBX and CB29 units
It features external pressure equalization via a 1/4-inch flare connection
Mixing new and used belts causes the new belt to carry the majority of the load
the charcoal media is designed for adsorption and becomes saturated over time
Siemens Building Technology 331-4811 Actuator 323269-701 this element is the designatedFor veteran technicians managing air handler units and mixing boxes, the Siemens 331 4811 represents the industry standard for pneumatic reliability. This No. 3 Pneumatic Damper Actuator is engineered with a rugged, all metal body designed to withstand the harsh environments of mechanical rooms. Operating on a nominal 8 to 13 psi spring range, this unit provides precise, gradual, or positive actuation of HVAC dampers and air valves. The 331 4811
