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Corporate Headquarters 9759 Inter Ocean Drive Cincinnati, Ohio 45246 513-874-8915 phone 513-874-1343 fax sales@effox.com |
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EFFOX manufactures two basic types of Slide Gate Dampers (sometimes referred to as Guillotine Dampers) which are ZERO LEAK and LOW LEAK.
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The ZERO LEAK design
is used primarily in positive pressure systems where zero flue gas leakage
past the closed damper is required. Zero leakage is obtained by
pressurizing the seal air chamber located around the periphery of the closed
blade with ambient seal air. These dampers can be found isolating boilers,
flue gas desulphurization (FGD)systems, fans, and other applications where
positive isolation is required. The LOW LEAK design is used primarily in systems where a small amount of leakage can be tolerated past the closed damper. Typical leakage can be less than a few percent, depending on damper size and system conditions. The low leak design is also used in negative systems where ambient in-leakage can be tolerated. These dampers can be found isolating precipitators, fans, stacks, and processes where positive isolation is not required. |
SLIDE GATE DESIGN FEATURES
A key component in the EFFOX Slide Gate Design is the Chain & Sprocket Drive Assembly. This design requires no lubrication. Additionally, there are no pins or side links to corrode or shear as seen with traditional chain & sprocket drives.
Pneumatic Cylinders or Jackscrews can be provided on smaller Slide Gate Dampers.
EFFOX provides a single thickness, solid plate blade which is designed for minimal deflection under all operating conditions. This ensures close contact with the seals and minimizes the potential leak path.
Thick metallic sweep seals, with heavy back-up retainers, are mounted outside the gas stream in large seal air chambers. The large seal air chamber ensures adequate flow around the perimeter of the damper blade while maintaining a cavity for the accumulation of solids. This design promotes ease of maintenance and long seal life. Chain & Sprocket actuation is preferred.
SAFETY FACTORS
- 300% on Drive Sizing
- 200% on Seal Air Volume at +3 inches (76 mm) W.G. above duct pressure for ZERO
LEAK applications.
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