Intended Use PJA single-blade dampers are used in rectangular ventilation ducts for airflow control. Where it is necessary to temporarily close the duct tightly, the baffle can be optionally fitted with a gasket to ensure the airtightness of the damper within the range of class 2 in accordance with EN-1751. Operating temperature: -20 °C to +90 °C, (+50 °C for the actuator version). Damper: SO galvanised sheet steel or sheet stainless steel (1.4301) SN Mechanism elements: moulded from galvanised steel or stainless steel Figure 1. PJA damper dimensions. Axles: aluminium or steel Gaskets: rubber The dampers are normally fitted with a 30 mm wide flange with corners. Upon special request, we can manufacture the following dampers: • Adjusted to other types of connection • In a version including external insulation Standard dimensions of PJA dampers: Table 1. Net surface area for PJA damper in a fully open position. The given actuator types can be used in several variants differing in communication and supply voltage. Rectangular single-blade damper

Chart 2. Air leaks through the P3A-U damper baffle (in a fully closed position). 2000 Chart 3. Air leaks through the PJA-U damper housing (in a fully closed position). Table 3. Approximate weight of PJA dampers. Note: the parameters given in the table apply to dampers without actuators. Rectangular single-blade damper

When ordering, please provide information as follows: none - A baffle without a gasket U - A baffle with a gasket A Clear width [mm] BX - Housing: B, baffle: none (a baffle without a gasket, surface area A x B<0,15 m2) CX - Housing: C, baffle: none (a baffle without a gasket, surface area A x B>0,15 m2) B2 - Housing: B, baffle: 2 (a baffle with a gasket, surface area A x B<0,15 m2) C2 - Housing: C, baffle: 2 (a baffle with a gasket, surface area A x B>0,15 m2) * Optional values - if not specified, the default values will be used “additionally provide: actuator manufacturer (Siemens/Belimo); supply...