Polyurethane steel bellows Uses: Suitable for dusting and suction equipment, industrial vacuum cleaners, air-conditioning and ventilation technology, food and pharmaceutical industry, chemical industry and so on. Such as: solid abrasive substance (dust, powder, fiber debris and particulate matter), a very high flow rate of wear force gravel, crushed stone, glass and chips useless, gaseous and liquid media (oil vapor, welding smoke, ventilation equipment ) of the delivery system. Features: The product uses a special TPU wire spiral embedded processing, with wear (3-4 times better than rubber; soft PVC6-7 times) anti-aging, tear, transparent suction and delivery process can be observed, Light weight, good scalability, good resilience and low compression performance, ultra-high strength and long life. Type: copper wire spiral TPU retractable hose; stainless steel wire helix TPU telescopic hose. Transmission medium: liquid chemical, food and beverage, oil, water, gas and solid particles Temperature: -35 ℃ -90 ℃ Hardness: 80A-90A Specification: Φ25mm-Φ350mm wall thickness: 0.6mm-1.5mm * According to customer request customized non-standard hose nature: pressure and vacuum resistance, very smooth material, good chemical resistance; food grade accord: FDA 21 CFR 177.2600 and 178.2010, EC guideline 2002/72 / EC (formerly 90/128 / EEC ), flame retardant in line with UL-94-V2, bending radius is about equal to the diameter, can discharge static electricity (according to BGR-132, formerly ZH 1/200) spiral wire grounded.