| 摘要 |
An electro-hydraulic pressing device, which is particularly suitable for producing pipe joints by means of press fittings, has a pressure piston (18), which acts on pressing jaws (10). The pressure piston (18) divides a pressure piston chamber (30) into a pressure chamber (32) and a rear chamber (34). A hydraulic pump (38) for feeding hydraulic fluid from a reservoir (40) is connected to the pressure chamber (32). A balance piston (68) is arranged in the piston (18) in addition to an overpressure valve (54). Up until a cut-out pressure is reached, i.e. throughout the pressing process, the balance piston (68) closes a connection opening (72) and a return flow channel (74). |
