4
Edition: 2021-04 Original document - Mi-205 EN
4 Technical specifications 17
4.1 Specifications 17
4.1.1 Gaskets 17
4.2 Fastening torque for flanges 19
4.2.1 Fastening torque for flanges valve body 19
4.2.2 Fastening torque for stuffing box 20
4.2.3 Tightening torque for screws in valves 21
5 Assembly 22
5.1 Unpacking and transportation 22
5.2 Installation of the valve in the pipeline 23
5.2.1 Important information for installation 24
5.2.2 End of line installations 24
5.3 Start up 26
5.4 Disassembly of the pneumatic actuator 27
5.5 Positioning of the shaft with disassembled actuator 28
5.6 Assembly of the pneumatic actuator 29
5.6.1 Actuator mounting alternatives 31
6 Maintenance 32
6.1 Disassembly of the butterfly valve from pipeline 32
6.2 Maintenance 33
6.2.1 Procedure to evaluate a leakage on a butterfly valve with pneumatic 34
actuator installed in a pipeline
6.2.2 Procedure to evaluate a leakage on a butterfly valve with gear 36
installed in a pipeline
6.3 Installation and disassembly of the stuffing box 38
6.4 Replacing the seat (standard metal seat) 40
6.4.1 Disassembly 41
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