Macoga MRW are rectangular metallic expansion joints featuring V-shaped convolutions and a camera corner geometry. They are designed for air ducts, exhaust gas ducts, and rectangular piping systems operating under low positive pressure or vacuum. End connections are available as flanged or weld ends, depending on project mechanical requirements.
Rectangular ducts are not standardized like circular piping; each MRW is custom-engineered. Selection should be based on:
MRW joints are unrestrained and do not absorb pressure thrust. Proper main anchors, directional anchors, and alignment guides are required. They are primarily used for axial movement absorption. Lateral movement can be accommodated with a dual-bellows arrangement; angular movement is only permitted if specifically designed for.
MRW joints are not intended for correcting misalignment. Protect bellows from impacts, scratches, arc strikes, and weld spatter. Remove yellow transport bars before pressure testing. Use chloride-free water for hydrostatic testing.
Are MRW joints suitable for high pressure?
No. MRU/MRW/MRV series are specified for low positive pressure and vacuum applications.
Do they absorb pressure thrust?
No. Calculated anchors and guides are required.
Rectangular expansion joint with V-shaped convolutions and camera corner.
This model is characterized by the shape of its corner camera type and the V-shaped convolution. It is very flexible and used in low pressure and vacuum conditions systems. The connection elements are available either with flanges or welding ends.
Rectangular expansion joint with V-shaped convolutions and camera corner.
MACOGA holds numerous industry approvals, including:
Ministry of Defense and NATO Member Countries
