Gas-tight shut-off dampers

• The SLC dampers can be operated either manually with a hand locking quadrant or, automatically with the aid of electric actuators.
• Standard construction of the SLC damper is available with 30 mm wide flanges in all four sides.
• The SLC dampers can also be supplied with either rectangular, square or circular spigots.
• The SLC dampers are also available for low closed blade leakage using the applications C2 variant.

• The damper casing and blades are made from 1.5mm thick galvanized steel sheet.
• The blades are fitted with 12 mm diameter mild steel spindle in zinc plating.
• The blade spindles are connected to the damper casing with bearing journals which have a maximum operating tamperature of 80 °C.
• The damper has face linkage with parallel blade arrangement.
• Counter-weight arm(s) is fitted to the side of the damper casing complete with adjustable weights, located outside of the air stream.
• The blades are fitted with tip seals made of Silicon rubber.

Gas-tight shut-off dampers are designed to ensure the level of tightness required by KTA Guideline 3601 (German Nuclear Safety Standards Commission, KTA) and by DIN 25414 even when the power supply or compressed air supply fails.

• Compact design and robust actuator mechanism allow for any installation orientation
• Maximum air leakage rate is 0.0028 (l/s)/m² or 0.01 (m³/h)/m² at a differential pressure of 2000 Pa
• Gas-tight closure, even when there is no power, due to special over centre locking mechanism
• Variants with hand wheel, pneumatic actuator or electric actuator
• Brass and stainless steel bearings
• Powder-coated casing and blades
• Maximum pressure loading of 5000 Pa, in closing direction
• Available in standard sizes and many intermediate sizes

Optional equipment and accessories

• Flange holes
• Limit switch
• Double acting pneumatic actuator, with optional solenoid valve
• Electric actuator 3 × 230 V AC (400 V AC) or 230 V AC