Air flow regulator VRK232

Constant volume flow controller, model VRK233, self-regulating with rubber seal air tight Class D, laser-welded housing. For differential pressure up to 1000 PA. No external power supply is required For flowrates 2.2-10.0m/s Available in sizes Ø80-Ø400 For differential pressure up to 1000Pa Single or double walled with 50mm acoustic insulation Available with 24V actuator The volume flow controllers VRK are used in complex piping systems for automatically controlling the amount of air distribution. Their task is to maintain a predetermined desired value of the air flow for the supply or exhaust air of a room sustainable and independent from fluctuating channel air pressure. In constant-volume controllers without auxiliary power, the flow control is achieved by an easy-moving, asymmetrical angled control panel that ensures a sensitive response and control behavior even for small amounts of air flow rates. The controller operates from the minimum pressure difference, which is a function of the volume flow (see diagram), up to the maximum pressure difference of 1000 Pa in a stable control range. Over this entire pressure range, the flow rate deviation is ± 10%. For smaller air speeds below 4 m/s, the flow deviation can be ± 20%. Unfavorable flow conditions, pollution or minor bracing during installation can also cause larger deviations. The components of the controller are largely resistant to aging and temperature resistant from -30°C to +100 °C. As for volume controllers with actuators the limiting operating temperatures of the actuators apply, -30°C to +50°C.