Siemens Building Technology 331-4811 Actuator
For 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 features an integral pivot and pivot post specifically for extended shaft mounting, ensuring a secure connection and optimal leverage for 2-3/8 inch stroke applications. Its ozone-resistant rolling rubber diaphragm maintains high-duty cycle performance without air leakage, while the 1/8-inch NPT female connection with a dual barb fitting allows for seamless integration with standard 1/4-inch OD tubing. Whether you are sequencing multiple control devices or performing a direct field replacement, this Siemens pneumatic actuator delivers the consistent torque and mechanical longevity required for high-velocity mixing boxes and terminal units.
- Extended Shaft Readiness: Includes integral pivot and pivot post for reliable mounting on various damper actuator shaft lengths.
- Industrial Durability: Metal-fabricated housing protects internal components from debris and environmental wear.
- Precision Control: The 8-13 psi range is calibrated for accurate modulating response in complex HVAC sequences.
- Maintenance Minded: Features a replaceable diaphragm and a rolling design that minimizes friction and hysteresis.
- Field Versatility: Suitable for both modulating control and two-position damper applications.
Common Questions
What is the maximum air pressure for the Siemens 331-4811?
The recommended control pressure range is the nominal 8 to 13 psi; however, these units are typically rated for a maximum control pressure of 20 to 30 psi. Always check your specific controller output to avoid over-pressurization.
Can I use this actuator for fire and smoke dampers?
The No. 3 series is often UL recognized for use on fire and leakage-rated dampers, but you must verify that your specific linkage and damper assembly meet local code requirements for life safety applications.
What mounting hardware is included with the 331-4811?
This specific model is configured for extended shaft mounting and includes the integral pivot and pivot post. If your application requires a fixed bracket or ball joint connector, please verify your mount type prior to installation.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $159.02
-65%$159.02
$55.66Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
For 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 features an integral pivot and pivot post specifically for extended shaft mounting, ensuring a secure connection and optimal leverage for 2-3/8 inch stroke applications. Its ozone-resistant rolling rubber diaphragm maintains high-duty cycle performance without air leakage, while the 1/8-inch NPT female connection with a dual barb fitting allows for seamless integration with standard 1/4-inch OD tubing. Whether you are sequencing multiple control devices or performing a direct field replacement, this Siemens pneumatic actuator delivers the consistent torque and mechanical longevity required for high-velocity mixing boxes and terminal units.
- Extended Shaft Readiness: Includes integral pivot and pivot post for reliable mounting on various damper actuator shaft lengths.
- Industrial Durability: Metal-fabricated housing protects internal components from debris and environmental wear.
- Precision Control: The 8-13 psi range is calibrated for accurate modulating response in complex HVAC sequences.
- Maintenance Minded: Features a replaceable diaphragm and a rolling design that minimizes friction and hysteresis.
- Field Versatility: Suitable for both modulating control and two-position damper applications.
Common Questions
What is the maximum air pressure for the Siemens 331-4811?
The recommended control pressure range is the nominal 8 to 13 psi; however, these units are typically rated for a maximum control pressure of 20 to 30 psi. Always check your specific controller output to avoid over-pressurization.
Can I use this actuator for fire and smoke dampers?
The No. 3 series is often UL recognized for use on fire and leakage-rated dampers, but you must verify that your specific linkage and damper assembly meet local code requirements for life safety applications.
What mounting hardware is included with the 331-4811?
This specific model is configured for extended shaft mounting and includes the integral pivot and pivot post. If your application requires a fixed bracket or ball joint connector, please verify your mount type prior to installation.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
