{"product_id":"sie-3312929","title":"331-2929","description":"\u003cp\u003eThis 331 Number 4 Pneumatic Damper Actuator has a clevis and clevis pin for use with frame mounting accessory and is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC and fire\/smoke dampers.  This actuator has a nominal spring range of 3 to 7 psi, integral pivot mounting and a replaceable diaphragm.  This actuator has an air connection of 1\/8\" NPT female with a dual barb elbow fitting for 1\/4\" OD tubing.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":48015872164080,"sku":"SIE-3312929","price":215.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/5118\/9744\/files\/siemens-331-2929.jpg?v=1758698831","url":"https:\/\/www.building-controls.com\/products\/sie-3312929","provider":"Building Controls \u0026 Solutions","version":"1.0","type":"link"}