Railmex Inc.

MDC Sleeve Type Rubber Expansion Joints are available in both single and multiple arch types. Both types are available in several construction design series, based on the application pressure and flexibility requirements.Most Sleeve Type expansion joints are similar to the Spool (Arch) Type, except that the sleeve ends have an I.D. dimension equal to the O.D. of the pipe. These joints are designed to slip over the straight ends of the open pipe and be held securely in place with clamps. This type of joint is recommended only for low to medium pressure and vacuum service because of the difficulty of obtaining adequate clamp sealing. The Lightweight version of the Spool Type expansion joint is dimensionally the same, except for reduced body thickness. This series is designed for very low pressure and vacuum applications. Joints are again available in single and multiple arch types. Consult MDC for the types of clamps available for sealing (T-bolt, Worm Gear, etc.) Another variant of Sleeve Type expansion joint is the Enlarged End Type. This joint can be manufactured in the same body design as the Spool Type and Lightweight Type. sleeve ends of this design are the same dimension as the O.D. of the pipe, while the rest of the joint is the same dimension as the I.D. of the pipe. This design can be manufactured with a filled arch to reduce possible turbulence and to prevent collection of solid material in the arch.

MDC Rubber Expansion Joints are designed to relief stress in piping systems, compensate for axial, lateral, torsional and angular movement, reduce noise, and isolate vibration, specifically as pump connectors. MDC products can be custom-built in a variety of styles and configurations. MDC offers flanged and slip-on connections, single or multiple arches, and a range of elastomers to meet process conditions, including Teflon-lined joints for severely corrosive applications.Standards and Specials include a great variety of materials (see table):NeopreneEPDMGum RubberNatural RubberButylChlorobutylBuna-N NitrileSBR GRS Buna-SHypalonViton FluorelSiliconeTeflon TFE FEPMost above materials available Teflon linedFor custom applications where internal and external conditions require different materials, we can fabricate joints with different tube and cover elastomers. We can offer special flange drillings, higher pressures or movements than listed standards, filled arches, and other options with most models.Control units or control cables are offered for movement restriction or containment of pressure thrust force.