The main parameters and parts of the escalator 1. The main parameters (1) rated speed (Y /): Cascade speed under no-load conditions (m / s). Typically 0.5m / s, 0.65m / s and 0.75m / s. (2) The angle (α): maximum angle relative to the horizontal running rung of the German city escalator, usually 30 ° or 35 °. (3) lifting height (H): vertical on the basis and starting point of the escalator under the height difference (m). (4) Step width (B): Cascade nominal width (mm). (5) rung horizontal section (L): the level of imports from the escalator at running (mm). When v = 0.50m / s, escalator design, L≥800mm; when v≤0.65m / s, the escalator price, L≥1200mml when v≤0.75m / s when, L≥1600mm. Tensioning device: shown in Figure 6.5, the tensioning device consists of ladder sprockets, shafts, car and tensioning step chain tensioning springs and other components. Tension spring tension adjustment nut can make the step chain in the escalator when in good working condition. When rung strand breaks or extended, escalator service, tensioning trolley guide rollers precise displacement to safety devices (Cascade-strand break protection) act, escalators stopped immediately. Escalator design _ Noah Witt elevator (certified) _ German city escalator provided by the Texas Noah Witt Elevator Company. Texas Noah Witt Elevator Co. (www.dznywt.com) (www.dznywt.com) is an industry leader in Shandong Dezhou, machinery and industrial products, cooperation projects over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Noah Witt Elevator leadership with the staff warmly welcome all inquiries negotiations to create Noah Witt elevator a better future.