SRC RECTANGULAR DAMPER FOR DIFFERENTIAL PRESSURE SYSTEMS Characteristics: SRC multi-blade dampers with backward blades are designed for airflow control or closing in rectangular ventilation ducts. Intended Use SRC multi-blade dampers with backward blades are designed for airflow control or closing in rectangular ventilation ducts. SRC-Z-KSN - External damper for the compact permanent leakage They can be installed outside buildings because the actuator and the damper mechanism are protected from the direct impact of meteorological factors. Special sealing inserts installed at the blade ends ensure high integrity. Within the range of class 3 – 4 in accordance with EN-1751. The respective blades are driven by an actuator, through a system of tie rods and gear reducer in a backward arrangement. Operating temperature: from -20 °C to +50 °C 115 Design The housing of the SRC damper is made of galvanised sheet steel. RAL painting of the body is also available upon special order. The damper blades are made of aluminium profiles. Special inserts with a sleeve seal are installed at the ends of the blades. The blades are provided with plain bearings made of fibreglass-reinforced PP. The aluminium profile shape is protected as a utility design and was registered with the Patent Office of the Republic of Poland. In terms of external appearance, the actuator and the damper mechanism are installed in a box providing protection against direct impact of meteorological factors. Manufacturing Versions SRC-W-R - Internal control damper SRC-W-O - Internal shut-off damper SRC-W-U - Internal damper for the double intake vent system SRC-Z-R - External control damper SRC-Z-O - External shut-off damper SRC-Z-U - External damper for the double intake vent system SRC-Z-KWR - External damper for the compact control exhaust louvre Figure 1. SRC-W-... damper dimensions. Rectangular damper for differential pressure systems 97 Figure 2. SRC damper blade. Standard dimensions of SRC dampers: Width A = 300÷1400 mm (1 mm interval) Height B = 305÷1405 mm (100 mm interval) Due to the width of the blade, the recommended height is B = n x 100 + 5, where n is the number of the blades. It is possible to make the damper another height (1 mm interval), with a masking frame covering the clearance parti

A damper with insulated blades and width A > 1200 mm is divided into maximum 1200 mm wide modules. The modules are connected with a common driving axle (single manual mechanism or actuator). If it is necessary to use a damper larger than 1400 x 1405 mm, a combined damper consisting of two smaller dampers is made. The dampers have independent driving axles (two separate manual mechanisms or actuators on opposite sides). Figure 4. SRC-Z-KWR damper dimensions. Figure 5. SRC-Z-KSN damper dimensions. Technical Data Table 1. Net surface areas for the SRC damper in a fully open position. Rectangular...

Pressure loss in a custom-height damper (with a masking frame covering the clearance partially) is comparable to the pressure loss for the nearest smaller standard height damper read from Chart 1. Chart 1. Pressure loss in a standard-height SRC damper (in a fully open position). Table 2. The number of actuators for SRC-W-R and SRC-Z-R dampers (NMQ24A-SR actuator). Cyfra - Quantity of the actuators in the damper H - Horizontal damper split V - Vertical damper split Rectangular damper for differential pressure systems

Table 3. The number of actuators for SRC-W-O and SRC-Z-O dampers (BF24 actuator).

Chart 2. Air leaks through the SRC damper baffle (in a fully closed position ). Chart 3. Air leaks through the SRC damper housing (in a fully closed Table 7. Approximate weight of SRC-W-... Dampers. Rectangular damper for differential pressure systems

When ordering, please provide information as follows: * Optional values, if not specified, the default values will be used Rectangular damper for differential pressure systems