Railmex Inc.

MDCs Externally Pressurized Expansion Joints are designed so fluid pressure acts on the outside bellows element rather than on the inside, as in the conventional expansion joint. The stabilizing effect of the external pressure increases the bellows capability to absorb long axial movement without squirm, making this type of expansion joint the best solution for many situations involving extensive axial movement. The construction of MDCs Externally Pressurized Expansion Joints includes a heavy outer pipe which contains the pressure, serves as a shroud to protect the bellows and also functions as a guide. An internal pipe acts as a liner and maintains fluid flow external to the bellows so that corrosive sediment cannot collect inside the bellows corrugations. Drain or vent connections can be easily provided to remove any sediment or gas that collects inside the outer pressure shroud. APPLICATIONS: Steam linesSteam condensateHeating waterDomestic hot waterChilled waterOther applications requiring large axial movementsSuitable for direct buried applications

Bellows Expansion Joints are engineered components which require careful attention when designing a piping system. This site provides the technical information required by a system designer. By continuing to select MDCs products, you can be assured of receiving reliable, high quality and safe piping components. MDC Metal Bellows Expansion Joints are known for their superior flexibility. The bellows are able to compensate for large movements in the axial, lateral and angular direction or mechanical vibration. MDC Bellows ensure the lowest possible forces combined with extreme longevity. This makes MDC Expansion Joints and Compensators ideal components to minimize stress and strain in pipes and extend the life of any piping system exposed to elevated temperatures. MDC Flexible Bellows Connectors ensure that suction and discharge nozzles of pumps and compressors are protected from high forces and movements and that vibration is not transmitted into the piping system. This will increase the durability of rotary equipment and reduce the noise level throughout the entire system.MDC Bellows Expansion Joints offer a cost effective alternative to other expansion devices while optimizing the productive life of the piping system. MDC expansion joints are designed to last as long as the system. All units meet the Standards of the Expansion Joint Manufacturers Association (EJMA).