Description
VOLUME FLOW LIMITER FOR INSERTION INTO DUCTING
Circular, mechanical self-powered controllers for insertion into ducting, for the quick and easy balancing of constant volume flow rates in ventilation and air conditioning systems
- Unique damper blade edge for acoustic optimization
- Simple and quick commissioning on site
- Range of volume flow rate setpoints for each nominal size
- Precise and simple setting of volume flow rates using a scale
- Best accuracy among controllers for insertion
- Suitable for low airflow velocities from 150 ft/min
- Any installation orientation; maintenance-free
Application
- Circular volume flow limiters of Type VFL for the simple balancing of volume flow rates in air conditioning systems
- Mechanical self-powered volume flow limiter without external power supply
- Simplified project handling with orders based on nominal size
- Set the required volume flow rate using a scale
Special features
- Mechanical self-powered
- Low-friction bellows
- For circular ducts
- Lip seal for tight and secure fit
- Aerodynamically tested and factory set to a reference volume flow rate
- Sticker showing volume flow rates (in l/s, m³/h and cfm) that can be set each limiter
Parts and characteristics
- Ready-to-commission limiter
- Damper blade with low-friction bearings
- Bellows that acts as an oscillation damper
- Leaf spring
- Lip seal
- Multi-level volume flow rate setpoint values
Construction features
- Circular casing
- Suitable for insertion into circular ducts to EN 1506 or EN 13180
- Lip seal for tight and secure fit
- Acoustically optimized damper blade with low-friction bearings and special bellows
- Different damper blade construction and volume flow rate sticker for nominal size 150
Materials and surfaces
- Casing and damper blade made of high-quality plastic, to UL 94, V0; to DIN 4102, material classification B2
- Classified per UL 2043
- Leaf spring made of stainless steel
- Polyurethane bellows
Standards and guidelines
- plastic, to UL 94, V0; to DIN 4102, material classification B2
- Hygiene conforms to VDI 6022
- Classified per UL 2043
Maintenance
- Maintenance-free as construction and materials are not subject to wear
Literature
