CIRCULAR SINGLE-BLADE DAMPER Characteristics: A circular single-blade damper used for airflow control or closing. Controlled manually or by an electric actuator. Single-blade dampers are used for airflow control or closing in circular ventilation ducts. Operating temperature: -20 °C to +90 °C, (+50 °C for the actuator version). Damper: galvanised sheet steel SO or sheet stainless steel (1.4301) SN Mechanism elements: moulded from galvanised steel or stainless steel. Normally - no flanges, adjusted for connection with SPIRO ducts. Upon special request, we can manufacture the following dampers: • Adjusted to other types of connection in a version including external insulation • In a version with a rubber gasket at the connection • In an airtight damper version (a gasket on the baffle). The device holds hygiene certificate no. HK/B/1514/01/2012. Manufacturing versions • PJB - Control damper (a baffle without a gasket), • PJB-U - Shut-off damper (a baffle with a gasket). • T1 - Damper with an actuator, • T2 - Damper with a manual mechanism • T3 - Damper with an extended axle (for the actuator installation) Table 1. Types of actuators and the net surface area for the PJB damper in a fully open position. Note: the parameters given in the table apply to the version -U \(a baffle with a gasket) Table 2. Type of the actuator. The given actuator types can be used in several variants differing in communication and supply voltage. Circular single-blade damper

Technical Data Chart 1. Pressure loss for the PJB damper (in a fully open position). Chart 3. Air leaks through the PJB-U damper baffle (in a fully closed position). Circular single-blade damper Chart 2. Pressure loss for the PJB damper (in a fully open position). Chart 4. Air leaks through the PJB-U damper housing (in a fully closed position).

none - A baffle without a gasket U - A baffle with a gasket CX - Housing: C, baffle: none (a baffle without a gasket) C4 - Housing: C, baffle: 4 (a baffle with a gasket) Circular single-blade damper