> Building Automation > DuraDrive > MA51-7101,Linear DuraDrive 230Vac 2-Position, 105 lbf (467N) Spring Return, Appliance Wire 
Application
DuraDrive Linear Actuators are designed to mount directly onto two-way or three-way globe valves without the use of linkages. They provide linear travel to operate valves from 1/2" to 2" VB-7xxx and discontinued 1/2" to 1-1/4" VB-9xxx in chilled water, hot water and steam applications up to 366 °F (186 °C).Linear spring return actuators provide either two position, floating or proportional modulation control (depending on model selection) of valves in HVAC systems.
Features
• Two position models controlled by SPST controller
• Floating models controlled by SPDT floating controllers
• Proportional models controlled by 0-3 Vdc, 6-9 Vdc, 0-10 Vdc, 0-20 mAdc, 2-10 Vdc, or 4-20 mAdc. Control function direct/reverse action is jumper selectable
• 105 lb force (467 newton) with 1/2" (13 mm) nominal linear stroke
• 24 Vac, 120 Vac, and 230 Vac models
• Rugged polymer housings rated for up to NEMA 2/IP54
• Overload protection throughout stroke
• Automatically sets input span to match valve travel
• Compact size to allow installation in limited space
• Manual override to allow positioning of valve and preload
• Spring return operation
• Direct mount to valves without separate linkage
• Polymer housing rated for plenum use
• Five year warranty
Product Specification Control Action Two Position SPST Voltage 230 Vac ±10% 50/60 Hz Running 50H VA 7.4 W 5.4 60H VA 7.4 W 5.4 DC Amps N/A Approximate StrokeTiming in Seconds @ 70°F (21°C) Powered 44 Spring Return 19
