For the compensation of thermal growth in small diameter piping systems, Unisource Series EC Expansion Compensators are the ideal choice. These economical expansion components utilize the design theory behind externally pressurized expansion joints that are used in large diameter steam piping and apply these designs to smaller size, lower temperature piping systems.
Features
Series EC Expansion Compensators are often used in HVAC systems such as hot water lines and steam condensate to absorb the effects of thermal pipe growth. Like externally pressurized expansion joints, Series EC expansion compensators are a packless, maintenance-free joint that incorporates an all stainless steel multi-ply flexible bellows, a steel enclosure, with an external and internal guide ring/sleeve to maintain proper alignment of the inner pipe. The sleeve isolates the bellows from media, eliminating flow turbulence. External pressure is applied to the bellows via a gap between the internal flange and the housing. Bellows squirm is eliminated by means of an internal flange, and also guides the bellows along the longitudinal center-line. The external pressure keeps the bellows stable. For proper operation, expansion compensators must be adequately anchored and guided.
Choose from either Style EC-MMT with carbon steel male NPT threaded ends or Style EC-FFS with copper tube ends. Carbon steel beveled weld ends or flanged ends can be attached upon request. Most styles are available in sizes from 3/4” through 4”. All sizes and styles are rated for 2” of axial travel.