Triac

The TRIAC SRX Series by A-T Controls comprises explosion-proof, spring-return electric actuators designed for quarter-turn valves and dampers requiring fail-safe operation. In the event of a power failure, these actuators utilize a mechanical spring to return the valve or damper to a predetermined safe position. ​

Key Features:

· Spring return design for fail-safe operation during power loss

· Torque output range from 300 to 1,800 in-lbs

· Power supply options: 24 VDC (SRX-0600), 120 VAC, or 220 VAC

· 90° cycle time of approximately 30 seconds

· Spring return time between 2 to 7 seconds (varies by model)

· Explosion-proof rating: Class I, Division 1, Groups C & D, T4

· Weatherproof enclosure: NEMA Type 4 and 4X

· Built-in thermal overload protection

· Anti-condensation space heater included

· Continuous mechanical position indicator

· Spring-loaded, lever push-type terminal blocks for easy wiring

Technical Specifications

Torque Output:

• Available models with torque ratings of 300, 600,      1,200, and 1,800 in-lbs

Power Supply Options:

• 24 VDC (available only on SRX-0600)
• 110 VAC or 220 VAC (single phase, varies by model)

Motor Specifications:

• 24 VDC: 100W motor, 5A current draw
• 110 VAC: 30W motor, 0.5A current draw
• 220 VAC: 30W motor, 0.33A current draw

Operational Timing:

• Powered 90° cycle time: approximately 30 seconds
• Spring return time:
  • SRX-0300: 2–6 seconds
  • SRX-0600: 2 seconds
  • SRX-1200: 7 seconds
  • SRX-1800: 7 seconds

Enclosure Ratings:

• Explosion-proof: Class I, Division 1, Groups C      & D, T4
• Weatherproof: NEMA Type 4, 4X; IP66 and IP67      compliant

Environmental Conditions:

• Operating temperature range: -40°C (-40°F) to 60°C      (140°F)

Travel Angle:

• 0 to 90° ± 10°

Standard Features:

• Thermal overload protection (activates at 130°C,      resets at 85°C)
• Continuous mechanical position indicator
• 10W anti-condensation space heater
• Spring-loaded, lever push-type terminal blocks
• Two ¾” NPT conduit entries (one for SRX-0300)
• Factory-lubricated with synthetic grease

Materials of Construction:

• Carbon steel, alloy steel, spring steel, stainless      steel
• Aluminum alloy, nitrile rubber (NBR), ABS,      polycarbonate