pressure range of 0−220 kPa.
A vacuum pump was used to vacuum the system to
0.003 MPa, then the 5th valve was turn off as the 7th valve
was opened. When the pressure of e vessel was increased to
0.1MPa, 7th valve was turn off and the 5th and 6th valves
were opened. Then, turn off 5th and turn on 7th until the pressure
of e vessel was pleased to the required pressure of testing.
At last, turn off 1, 2, 3, 4, 6, 9 valve ports.
pressure range of 0−220 kPa.A vacuum pump was used to vacuum the system to0.003 MPa, then the 5th valve was turn off as the 7th valvewas opened. When the pressure of e vessel was increased to0.1MPa, 7th valve was turn off and the 5th and 6th valveswere opened. Then, turn off 5th and turn on 7th until the pressureof e vessel was pleased to the required pressure of testing.At last, turn off 1, 2, 3, 4, 6, 9 valve ports.
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