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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
The normally closed (N/C) configuration ensures the valve remains securely shut until energized
What is the maximum temperature this sensor can withstand
the unit supports standard duplex wall box mounting
Does this board include the logic and relay modules
Siemens Building Technology 331-4811 Actuator 322838-752 The normally closed (N/C) configurationFor 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