Macoga MRV are rectangular metallic expansion joints featuring V-shaped convolutions and miter corners. Corners can be single or double mitered. Connection options include flanged ends or weld ends, depending on duct configuration and project requirements.
The MRU / MRW / MRV series is designed for rectangular ducts operating under low positive pressure or vacuum. Typical applications include ducting for flue gas, process gas, and air in power plants, chemical, petrochemical, and steel facilities. Each unit is custom-engineered, as rectangular ductwork does not follow standardized dimensions.
MRV expansion joints are unrestrained and do not absorb pressure thrust. System design must include main anchors, directional anchors, and alignment guides.
MRV joints are not intended for correcting duct misalignment. Prior to installation, verify nameplate data, convolution cleanliness, gaskets, guides, and anchors. Remove yellow transport bars before pressure testing. For hydrostatic tests, use chloride-free water.
Is an actuator required?
No. The joint operates passively, responding to thermal movement of the duct.
What is checked during maintenance?
Leakage, pressure loss, external corrosion, vibration, loose mechanical parts, and debris between convolutions.
Rectangular expansion joint with V-shaped convolutions and miter corner.
This model is characterized by the shape of its miter type corner and its V-shaped convolution. The corner can be either single or double. The connection elements are available either with flanges or welding ends.
Rectangular expansion joint with V-shaped convolutions and miter corner.
MACOGA holds numerous industry approvals, including:
Ministry of Defense and NATO Member Countries
