PS RECTANGULAR MULTI-BLADE AIRTIGHT DAMPER Characteristics: A rectangular multi-blade damper with backward blades and a high level of tightness used for airflow control or closing. Controlled manually or by an electric actuator. Manufacturing Versions The PS dampers can be mounted in air handling units, in walls or ducts, for precise airflow rate control. Due to their design, they ensure a high level of tightness. The dampers operate very well as shut-off devices. The dampers meet the requirements of leakage class 2 in accordance with EN-1751. They can be used in systems that meet special requirements: operation with recuperators (split dampers), protection of the heaters in air handling units against freezing. PS dampers are particularly recommended for air handling units. Drive: T1 – Damper with an actuator T2 – Damper with a manual mechanism T3 – Damper with an extended axle (for the actuator installation) The device holds hygiene certificate no. HK/K/0841/02/2017. Design PS louvre dampers are made of four types of hardened AL profiles: vertical housings, horizontal housings, blades (louvres) and the shelves for actuators. Damper louvres are connected with bearings and gears made of polypropylene (PP). The drive system is embedded in the profile (vertical housing). The PVC gasket is a seal between the damper blades. The aluminium profile design of the dampers makes it possible to achieve a high precision of the product and installation and therefore they ensure tightness when closed and minimum airflow resistance when open. A built-in drive system makes it possible to completely isolate the damper externally. A special shelf makes the installation of the actuator or the manual mechanism easier. Within the inside diameter of the damper of dimension B ≥ 1200 mm the blades are connected with a tie rod made of galvanised steel, which protrudes outside the housing. Figure 1. PS damper dimensions. PS dampers can be made with blades filled with insulating foam. The length of such a blade cannot exceed 800 mm, therefore PS dampers with blades filled with insulation of width A > 800 mm are divided into appropriately smaller coupled kinetic fields separated by means of posts. Operating temperature: -20 °C to +90 °C (+50 °C in the version Dimensions 115 100 A A+60 with an actuator). Figure 2. PS damper blade. Standard dimensions of PS dampers: Width A = 100÷3000 mm (1 mm interval) Height B = 110÷2510 mm (100 mm interval) Due to the depth of the blade, the recommended height is B = n x 100 + 10, 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 partially. The damper of width A > 1400 mm (A > 800 mm for the insulated blades) is divided into modules of maximum width 1400 mm (800 mm). The modules are connected with a common driving axle (single manual mechanism or actuator). Rectangular multi-blade airti

If it is necessary to use a damper larger than 3000 x 2510 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). The aluminium profile shape is protected as a utility design and was registered with 1 the Patent Office of the Republic of Technical Data Table 1. Types of actuators and the net surface area for the PS damper in a fully open position. Combined damper consisting of several smaller dampers. For a custom design - please contact Smay. (*) - Combined damper 2 x ... Nm...

Chart 1. Pressure loss for the standard-height PS damper (in a fully open position). 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. Δp (600 x 460) ≈ Δp (600 x 410) from Chart 1 Chart 2. Air leaks through the PS damper baffle (in a fully closed position). Rectangular multi-blade airtight damper Chart 3. Air leaks through the PS damper housing (in a fully closed positio

Table 3. Approximate weight of PS dampers. Note: the parameters given in the table apply to the dampers with the blades with no insulation and without an actuator Rectangular multi-blade airtight damper

When ordering, please provide information as follows: I Damper blade insulation* none - Without insulating foam filling t - Filled with insulating foam A Damper inner clearance width [mm] B Damper inner clearance height [mm] W Number of damper cross divisions [0 - none]* * Optional values, if not specified, the default values will be used “additionally provide: actuator manufacturer (Siemens/Belimo); supply voltage (24 V or 230 V), safety functions (with or without spring return), operation of the return spring (spring closes the damper or spring opens the damper), type of control (close/open,...