Pneumatic valve DVML-D

electrically-actuatedhydraulicfor control

Damper valves DV LDV as T (tandem) or DB (double blade) 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. Industrial Applications of Rectangular Butterfly Dampers 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 Technical Characteristics of Air Sealed Multi-Blade Dampers Dimensions range MLDVR-T : max. 12000 x 12000mm (larger sizes on request) Gland packing : Graphite (other depending on medium and temperature) Installation of dampers : face-to-face length, working position (acc. to customer requirements) Materials: Depending on medium, temperature, customer reqiurements 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)