Buried Note filling sleeve compensator applies to straight pipes laid end sets, packing chamber, guide shaft structural characteristics: (1) along the pipe axis direction of the inner sleeve relative sliding movement, absorbing pipe thermal elongation hot and cold shortened to thermal stress. (2) Special sealant injection material by check injection nozzle, the inner realization of the sliding seal between the sleeve sealing pressure at equilibrium. (3) rely on guide bearings to withstand lateral forces pipelines to achieve a, at the sleeve coaxially relative motion causes high pipeline operation more reliable and durable. (4) Note filling sleeve compensator sleeve within the outer end portion extending into taking strong anti-extrusion design, make the product more secure. Features: sleeve compensator similar structure, for use in cold water network NOTE filling sleeve compensator, as long as the sliding surface of the inner sleeve to protect high-quality finish, can be used for an underground, under normal operating conditions (excluding Factors earthquake, subsidence, etc.) can be in the pipeline with life, we do not need maintenance. For an underground steam pipe, we recommend using a composite injection-administered sleeve compensator puzzle manholes.