This Siemens Powers Controls 331-3070 No. 6 Damper Actuator is in unused condition and is guaranteed to be fully functional. This item came from a local MFG that had surplus new/old stock replacement inventory. Please feel free to contact us with any questions. Description The No. 6 Damper Actuators - Tandem Mounting consist of two No. 6 actuators piloted by a positioning relay mounted on a sturdy angle iron frame. Features ? Spring span and start point are adjustable ? Actuators have spring return ? Diaphragms are replaceable Application The No. 6 Damper Actuators - Tandem Mounting is recommended to position inlet vanes on fans or large dampers that use a jackshaft. Product Number 331-3070 Specifications Effective diaphragm area 35.8 inch2 (230 cm2 ) Stroke 4 inch (102 mm) Diaphragm Ozone-resistant silicone rubber Maximum air pressure 30 psig (210 kPa) Spring start point-adjustable 3 to 10 psig (21 to 69 kPa) Spring span-adjustable 3 to 10 psig (21 to 69 kPa) Spring range-factory setting 3 to 13 psig (21 to 90 kPa) Ambient temperature range Operating -20F to 200F (-29C to 93C) Air connection 1/8-inch NPT Type of mounting Pivot