Door tensioner can be widely used in logistics, cargo bundling and cargo handling.Light weight, easy to use, soft and flexible, low tension, wear-resistant, long-life raw material (polyester silk), moisture-proof, can prevent damage caused by wind and frost.Because of its high corrosion resistance, it can protect items for the same amount of time.All Yaletex belts are heat treated and stretched in accordance with en 12195-2.The length and carrying capacity of the product can be customized according to the requirements.As a partner of many well-known brands, EHSY ensures employees' occupational health, safety environment and bright future with its excellent quality and service.Manual, ring directly fixed belt conveyor tensioner winch tensioning device, can be set up on the automatic control system, the automatic tensioning device, is widely used in modern large-scale belt conveyor tensioning form, because of the automatic fastening structure and control tensioning device device the device of the automatic tensioning process was complicated;The difference between automatic tensioning device and fixed tensioning device lies in the material sensing element and control system of the tensioning device.The design and use of practical automatic tensioning device must take full account of the influence of the environment.In order to solve this problem, various automatic tensioning devices have been proposed or used.The method distinguishes the automatic tensioning device from the stable type and the driven type.