ZTWB DC medium thrust free compensator: it is composed of reducer, inner sleeve, seal seat sleeve, flexible graphite packing, nuts and bolts. The advent of ztwb DC medium thrust free compensator is undoubtedly a breakthrough of thermal pipeline compensator products. It not only opens up a new field for the production of compensator, but more importantly, it not only solves the fatal weakness of working medium thrust in the pipeline, but also solves the disadvantages of bypass tube thrust free compensator, such as excessive stress concentration and large medium resistance. It is widely used in chemical industry, electric power, metallurgy, heat supply, temperature supply oil products, acid and alkali, liquid, gas and water pipelines. It is the most ideal pipeline expander at present.