Full Face Rubber Flanged Expansion Joints - MAC-FP / Hinged | Macoga

MACOGA MAC-FC Gimbal – Full-Face Flange Elastomeric Expansion Joint

The MAC-FC is an elastomeric expansion joint of the gimbal type, designed for piping systems requiring angular movement in any plane without transferring pressure thrust to main anchors. Angular deflection is achieved via two pairs of hinges mounted on a common floating gimbal ring.

Operation

The gimbal ring, hinges, and pins absorb:

• axial force from internal pressure,
• shear loads,
• wind loads,
• dead weight of the assembly.

Not intended for axial or lateral movement. Primary function is single or multi-plane angular deflection, with torsional restraint of the elastomeric body.

Construction

• Type: full-faced rubber flange expansion joint.
• Series: MAC-FC / Gimbal.
• Design: single or multiple convolution elastomeric section.
• Flanges: metallic backing flanges, split or fixed.
• Drilling: EN, ANSI, AWWA, JIS, or project-specific patterns.
• Dimensions: custom-built, available up to DN6000 for full-face series.

Materials & Media

Elastomer selection is based on media, temperature, and chemical compatibility:

• EPDM: water, hot water, seawater, oil-free air.
• EPDM HT: hot water applications up to 140 °C.
• NBR: oils, fuels, hydrocarbons, gases.
• SBR / Natural Rubber: sludge, wastewater, liquids with solids.
• FKM/Viton: chemicals, solvents, oils, hydrocarbons up to 150 °C.

Selection vs. MAC-FP

The MAC-FP hinged allows angular movement in a single plane. The MAC-FC gimbal is selected when angular movement may occur in multiple planes and mechanical absorption of pressure thrust is required.

Applications

Typical uses: power generation, oil & gas, desalination, cooling water, chemical processing, HVAC, shipbuilding, offshore, water and wastewater treatment. No actuator required. Selection based on DN, pressure, temperature, media, angular movement, vacuum service, and piping loads.