VAV B 50 Series

Type: Rectangular / Round

Construction: Galvanized Steel (GI) / Stainless Steel 

Application: Light & Medium Duty


Constant Air Volume (CAV) Model B-51 is used in heating, ventilating, and air-conditioning system. In CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space.


In CAV application the terminals maintain the required constant airflow independent to inlet statis pressure. CAV systems are often used due to their simplicity, low cost, and reliability in small buildings and residences. CAV systems often have on/off control, rather than supply air temperature modulation, to vary their heating or cooling capacities to serve a single thermal zone.CAV systems are usually used in spaces with large open areas having uniform loads like theaters, auditoriums and exhibition halls.


Technical Features:

  • Volume control range from 100 to 10% is possible to the
    conditioned zone.
  • CAV with reheat, CAV multizone, and CAV
    primary-secondary systems can serve multiple zones
    and larger buildings.
  • Accurate airflow sensing with 2 X 12 points averaging.
  • Low Leakage i.e. less than 2% of V nominal at 750 Pa.
  • Designed to produce low NC levels with minimal
    pressure drop to the system.
  • Suitable for low temperature primary systems.
  • Air volume capacity upto 2800 CFM. Suitable for use as constant volume application
  • Electronics control factory supply & mounted.
  • Variety of control options available, based on
  • Electronic thermostat & actuator provide accurate
    mounting control.
  • Metal encapsulated edges limit fiberglass insulation
    erosion into the airstream.
  • Single-point power connection reduces installed cost.
  • Maintenance free.

Standard Construction


0.9 mm thick galvanized sheet steel.


13 mm thick 32 kg/m³ density Acoustic liner.


0.9 mm thick galvanized sheet steel.

Flow grid

Flow grid multi point with 12 inlet holes in four concentric

Axle Shaft

12 mm diameter damper shaft made of galvanized steel.


12 mm diameter Brass bearings.


Neoprene Gasket.

Controls :

Modulating / On-Off.

Optional Fittings


Backnet DDC with suitable thermostat.


25 mm thick 32 kg/m³ density Acoustic liner.


0.9 mm thick aluminium extruded aerofoil multiple blades.

Duct Heater

Slip-in type electric duct heater (230V AC 1 Phase or
400V AC 3 Phase)

Double skin

Insulated internal walls surface with Galvanized perforated
sheet used for low noise applications to minimise breakout

Neck connections

Round inlet with round outlet and square inlet with square


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