Damper Valves With Sealing Air System
Damper valves type DV-TD as D (Double) execution are of welded construction and are designed as 100% tight valves to shut-off media such as air or process gas.
The design involves injecting air produced by a fan between the two discs, in order to create overpressure and ensure a seal between the upstream and downstream sides of the valve.
Due to their material selection, precise execution and control technology, these dampers are usually important components of a plant with high expectations of reliability. As such, they are subject to thorough testing, especially concerning their tightness.
Applications of Butterfly Damper Valves with Air Sealing
- Flue gas desulphurisation
- Dust extraction of furnaces
- Utilisation of SO2, SO3, NOX
- Air-tight sealing of production processes in smelters
- Chemical and paper industry
- Glass smelters
- Non-ferrous metals smelters
Diameter Range for Double Disc Designs
DN200 – DN4000 (larger sizes on request)
Design Pressure and Performance
- < < 0,5 bar
- Temperature range
- -20°C up to +750°C or acc. to customer request (max. working temperature up to 1050ºC)
- Packing gland : graphite (other depending on medium and temperature)
- Installation of dampers / face-to-face length / working position (acc. to customer requirements)
Construction Materials and Durability
Depending on medium, temperature, customer reqiurements
Actuator Options and Automation Systems
Pneumatic quarter turn or linear actuators with accessories acc. to technical and customer requirements
Electric quarter turn actuators with accessories acc. to technical and customer requirements
Special design
- Actuating systems equipped with electric actuators, electromagnetic couplings,
hydraulic dampers (quick closing or quick opening valves for emergency modes of operation) - Actuating systems with counterweights or return springs (quick mechanical safety actuators in case of emergency – closing or opening)
