Double method limit expansion device installation

Double method limit expander is the building water supply and drainage pipeline more widely cut-off valve auxiliary spare parts, in addition to convenient and quick cut-off valve maintenance when the disassembly and installation, is also given a certain offset of the axial expansion type. Although the installation is convenient and quick, the use of the actual effect is very good. Save human resources management, but if the installation is not regular or double method limit telescope pipeline pressure does not match, it will have a very serious negative impact. The following is a description of the process of installation or pressure application difficulties.
1 . 1. The pressure must not be applied in such a way that the telescopic end of the double law limiters will drag out due to the cracking of the fixed bracket.
2 . In the test if the soil layer is soft, should be calculated in detail to choose to play steel sheet pile construction or wood pivot point and other precautionary measures for engineering reinforcement to take into account the load of the blind valve torque of the pressure test .
3 . Pressure test based on and then configured to be installed by professional and technical personnel in accordance with the specifications of the building atlas, can not be installed privately and blindly from the crowd; .
4 . Pressure test, it is strictly prohibited to knock or repair the defects of the pipe body and jack. If there is a defect, it should be well marked and repaired after the release of pressure .
5 . Shall be harshly in accordance with the pressure level of the pipeline to match the relativity of the double method limit expansion device .
6 . Project completion acceptance to be accepted by the bidding party, construction personnel a project completion acceptance .
7 . The bursting engineering pressure of the double method limit expander is the relatively large pressure level of the pipeline that should be installed, and the standard cannot be changed privately.