... : 3.5-4.5MPa 4). Operation mode: manual/automatic 2. Helical Hose Forming Machine: 1). Diameter: DN8-DN50mm 2). Thickness: 0.2 ... of the bellows: annular bellowsApplications: for auto exhaust bellows, flexible metal hoses, and expansion jointsControl: PLC controlLength: ≤7500mmExpanding medium: emulsified liquidForming ... : DN200,250, 300,350,400,450,500,550,600mm Hydraulic Metal Hose Making Machine