A dual membrane restrictor adapted for connecting to an oil supplying device, a loading device and a recycling device is provided. The dual membrane restrictor includes a casing, a first membrane and a second membrane. The casing has a first channel connected to the oil supplying device, a first chamber, a second chamber, a second channel connected to the loading device and a third channel connected to the recycling device. The first membrane is disposed in the first chamber, wherein the first chamber is divided to a first upper chamber and a first lower chamber by the first membrane and the first channel is connected to the first upper chamber. The second membrane is disposed in the second chamber, wherein the second chamber is divided to a second upper chamber and a second lower chamber by the second membrane and the second upper chamber is connected to the first lower chamber and the second channel. The second lower chamber is connected to the second channel and the third channel. |