ASLI STR Circular VAV Terminal Units are airflow controllers designed for variable air volume systems. They regulate conditioned air into spaces based on thermostat or BAS signals, and can operate as stand-alone units or be integrated with LONWORKS. Each unit is factory-fitted with actuator, controller, and transformer, and tested to ensure accurate calibration. The terminals maintain pressure-independent operation by compensating for supply air pressure changes. Two models are available: STR (basic unit) and STRC (with external cladding for reduced radiated noise).
Casing : 0.7mm galvanized steel.
Damper blade : Double layer 0.7mm thickness galvanized steel with a sandwiched peripheral gasket
Bearing : Engineering plastic.
Hexagon shaft : Hexagon bar mild steel.
Differential pressure sensor : Aluminum.
Cladding (Optional) : 0.7mm galvanized steel packed with fiberglass.
Air Control Volume Type
Variable Air Volume (VAV) Pressure Dependent Control
• Without differential pressure sensor.
• Pressure dependent.
• No monitoring of air volume.
Variable Air Volume (VAV)
Pressure Independent Control
• With differential pressure sensor.
• Pressure independent.
• Air volume varies depending on design flow and signal by controller.
• Air volume could be monitored.
Constant Air Volume (CAV)
• With differential pressure sensor.
• Pressure independent.
• Air volume is constant (design flow) provided that the minimum static pressure is achieved.
• Air volume could be monitored.
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