VRE
The VRE is a circular variable flow rate controller
The round flow rate control unit VRE is designed to control an initial pressure-independent constant or variable air flow.
VRE units comprise of housing, flow rate measuring element with sensor, damper blade with actuator and controller. The housing is provided with plug-in end pieces with insertion groove for a lip-seal gasket, to fit air ducts according to DIN EN 1506 or EN 13180.
The flow rate is measured using a measuring orifice as an active pressure transducer and with a differential pressure sensor, the measured differential pressure being the dimension for the flow rate.
The controller compares the actual value measured by the sensor with the setpoint value, and corrects the divergence by altering the damper setting using the actuating drive.
Control and regulation are achieved with external energy, either electric or pneumatic depending on the chosen design.
All components are factory-wired and hose-connected. The flow rate controllers are rated for air velocities of 1...10m/s.
Depending on the size, the control component and the set flow rate, the minimum pressure difference is approx. 10...130Pa.
- Casing of galvanised sheet steel with console for attachment of the electrical servo motor and controller
- Damper blades of galvanised sheet steel, damper seal of EPDM
- Damper axle of galvanised high-precision steel acc. to DIN 1652 or high-precision tubular steel starting from size 500
- Maintenance-free low-friction damper bearing in bushings of Hostaform C 9021.
- Flow rate controller with servo motor including air speed or differential pressure gauge with controller
- Sizes 100 to 630 diameter
- Galvanised steel as standard, PPS and stainless steel versions available
