Shut-Off Dampers
SHUT-OFF DAMPERS are effective in isolating duct system that requires air tightness. These dampers can be also supplied with ATEX Directive 2014/34/EU for explosive atmosphere installations.
SHUT-OFF DAMPERS can be manufactured to fit both rectangular and circular ducts.
SHUT-OFF DAMPERS can be fitted with electric or pneumatic actuators which shall include limit switches or proximity sensors that detect the position of the damper blades which in turn can be interfaced with monitoring and control system.
These dampers can operate at temperatures between -40 ~ +60℃ but subject to change depending on the selected components.
Product Features:
The maximum size of the single type is 1,200 mm(W) and 1,400 mm(H) and mullion type is 2,500 mm(W) and 2,900 mm(H). An open/close indication is visible on the damper enclosure side. The maximum duct pressure of damper operation is 5,000 Pa.
ELECTRIC SHUT-OFF DAMPER (ESD)
The electric actuator requires 24 to 230 VAC/DC of electrical supply to open the damper blades. The damper blades shall close when the power is cut-off.
PNEUMATIC SHUT-OFF DAMPER (PSD)
The pneumatic actuator requires a supply of 5~8 bar of clean/dry instrument air to open the damper blades. The damper blades shall close when instrument air is cut-off or pressure is too low.
MANUAL SHUT-OFF DAMPER (MSD)
A handle is provided at the side of the damper casing for operators to open and close the damper blades. A quadrant plate installed with the handle gives a visual indication whether the blades of the dampers are in the open or closed position.
LEAKAGE RATE
The spring type side seal is provided to achieve the EN 1751 based leakage classes given below.
| Damper sectional area | Casing leakage | Blade leakage |
|---|---|---|
| ≥0.16m² | Class B | Class 3 |
| < 0.16m² | Class B | Class 2 |
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