Siemens Pneumatic Linear Actuator
The Siemens Pneumatic Actuator: Rotary (SKU 331-4821, MPN 331-4821) is a linear actuator with a pivot connection, designed for fire and smoke applications. It features an 8 psi to 13 psi spring range, extended shaft…
SKU 3G-OTH-67679
Also listed as: 3314821 · 331 4821
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Product Description
The Siemens Pneumatic Actuator: Rotary (SKU 331-4821, MPN 331-4821) is a linear actuator with a pivot connection, designed for fire and smoke applications. It features an 8 psi to 13 psi spring range, extended shaft mounting, and a 2 3/4 in stroke. No positioner is included.
Frequently Asked Questions
What is the Siemens 331-4821 pneumatic actuator used for?
The Siemens 331-4821 pneumatic actuator is designed for fire and smoke applications, such as controlling dampers in HVAC systems. Its pivot connection and extended shaft mounting suit rotary damper installations. With an 8 psi to 13 psi spring range and 2 3/4 in stroke, it provides reliable fail-safe positioning in life-safety systems.
What are the specifications of the Siemens 331-4821 pneumatic actuator?
The Siemens 331-4821 is a linear actuator with a pivot connection, extended shaft mounting, and a 2 3/4 in stroke. It operates with an 8 psi to 13 psi spring range and is intended for fire/smoke applications. No positioner is included. The actuator is manufactured by Siemens under MPN 331-4821.
Where to buy the Siemens 331-4821 pneumatic actuator worldwide?
You can source the Siemens 331-4821 pneumatic actuator through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens components for fire and smoke damper applications.
How to install the Siemens 331-4821 pneumatic actuator?
Install the Siemens 331-4821 by mounting it with the extended shaft bracket to the damper pivot. Connect pneumatic supply within the 8 psi to 13 psi spring range. Ensure the 2 3/4 in stroke aligns with damper travel. No positioner is included, so external control is required. Follow Siemens guidelines for fire/smoke actuator installation.
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3G Electric supplies Siemens linear actuators. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.