Siemens Building Technology 331-2973 Kit
The Siemens 331-2973 is a rugged, metal-fabricated No. 4 pneumatic damper actuator designed for the gradual or positive control of HVAC systems and fire/smoke dampers. Built for high-demand applications, this piston-type actuator features a 4-inch stroke and a nominal 8-13 psi spring range, ensuring precise positioning of ventilating systems and mixing boxes. This universal kit includes a mounting plate, pivot post, clevis, and damper crank, facilitating both extended shaft and frame mounting configurations. The internal rolling diaphragm is constructed from ozone-resistant EPDM rubber, providing a large effective area for consistent thrust. With 1/8-inch NPT internal threads and a dual barb elbow fitting for 1/4-inch OD tubing, this unit integrates seamlessly into existing pneumatic control loops. Engineered for reliability in terminal units and unit ventilators, the 331-2973 kit is the industry standard for contractors requiring UL-recognized components for fire and smoke safety compliance.
Key Benefits:
- Universal Mounting Versatility: Included hardware supports pivot, fixed, and frame mounting for maximum field flexibility.
- Durable Construction: All-metal body designed to withstand harsh mechanical room environments.
- Fire & Smoke Rated: UL recognized for use in fire and smoke leakage-rated dampers.
- Serviceable Components: Features a replaceable EPDM diaphragm for extended equipment life cycles.
- High Thrust Output: Delivers consistent force for operating large outdoor air and exhaust dampers.
Common Questions:
Is this actuator suitable for fire/smoke applications?
Yes, the 331-2973 is UL recognized for fire and smoke applications, meeting category EMKU2 requirements for leakage-rated dampers.
What is included in the universal kit?
The kit contains the pneumatic actuator, mounting plate, pivot post, hardware, clevis, and a damper crank for 90-degree rotation.
Can the diaphragm be replaced in the field?
Yes, the ozone-resistant EPDM rolling diaphragm is replaceable, allowing for easier maintenance without replacing the entire housing.
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: $253.16
-65%$253.16
$88.61Siemens Building Technology 331-2973 Kit
The Siemens 331-2973 is a rugged, metal-fabricated No. 4 pneumatic damper actuator designed for the gradual or positive control of HVAC systems and fire/smoke dampers. Built for high-demand applications, this piston-type actuator features a 4-inch stroke and a nominal 8-13 psi spring range, ensuring precise positioning of ventilating systems and mixing boxes. This universal kit includes a mounting plate, pivot post, clevis, and damper crank, facilitating both extended shaft and frame mounting configurations. The internal rolling diaphragm is constructed from ozone-resistant EPDM rubber, providing a large effective area for consistent thrust. With 1/8-inch NPT internal threads and a dual barb elbow fitting for 1/4-inch OD tubing, this unit integrates seamlessly into existing pneumatic control loops. Engineered for reliability in terminal units and unit ventilators, the 331-2973 kit is the industry standard for contractors requiring UL-recognized components for fire and smoke safety compliance.
Key Benefits:
- Universal Mounting Versatility: Included hardware supports pivot, fixed, and frame mounting for maximum field flexibility.
- Durable Construction: All-metal body designed to withstand harsh mechanical room environments.
- Fire & Smoke Rated: UL recognized for use in fire and smoke leakage-rated dampers.
- Serviceable Components: Features a replaceable EPDM diaphragm for extended equipment life cycles.
- High Thrust Output: Delivers consistent force for operating large outdoor air and exhaust dampers.
Common Questions:
Is this actuator suitable for fire/smoke applications?
Yes, the 331-2973 is UL recognized for fire and smoke applications, meeting category EMKU2 requirements for leakage-rated dampers.
What is included in the universal kit?
The kit contains the pneumatic actuator, mounting plate, pivot post, hardware, clevis, and a damper crank for 90-degree rotation.
Can the diaphragm be replaced in the field?
Yes, the ozone-resistant EPDM rolling diaphragm is replaceable, allowing for easier maintenance without replacing the entire housing.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Siemens 331-2973 is a rugged, metal-fabricated No. 4 pneumatic damper actuator designed for the gradual or positive control of HVAC systems and fire/smoke dampers. Built for high-demand applications, this piston-type actuator features a 4-inch stroke and a nominal 8-13 psi spring range, ensuring precise positioning of ventilating systems and mixing boxes. This universal kit includes a mounting plate, pivot post, clevis, and damper crank, facilitating both extended shaft and frame mounting configurations. The internal rolling diaphragm is constructed from ozone-resistant EPDM rubber, providing a large effective area for consistent thrust. With 1/8-inch NPT internal threads and a dual barb elbow fitting for 1/4-inch OD tubing, this unit integrates seamlessly into existing pneumatic control loops. Engineered for reliability in terminal units and unit ventilators, the 331-2973 kit is the industry standard for contractors requiring UL-recognized components for fire and smoke safety compliance.
Key Benefits:
- Universal Mounting Versatility: Included hardware supports pivot, fixed, and frame mounting for maximum field flexibility.
- Durable Construction: All-metal body designed to withstand harsh mechanical room environments.
- Fire & Smoke Rated: UL recognized for use in fire and smoke leakage-rated dampers.
- Serviceable Components: Features a replaceable EPDM diaphragm for extended equipment life cycles.
- High Thrust Output: Delivers consistent force for operating large outdoor air and exhaust dampers.
Common Questions:
Is this actuator suitable for fire/smoke applications?
Yes, the 331-2973 is UL recognized for fire and smoke applications, meeting category EMKU2 requirements for leakage-rated dampers.
What is included in the universal kit?
The kit contains the pneumatic actuator, mounting plate, pivot post, hardware, clevis, and a damper crank for 90-degree rotation.
Can the diaphragm be replaced in the field?
Yes, the ozone-resistant EPDM rolling diaphragm is replaceable, allowing for easier maintenance without replacing the entire housing.
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.
