Test of outlet pressure of Roots vacuum unit


The temperature rise of Roots vacuum unit refers to the difference between the maximum temperature and the room temperature measured at all parts of the pump surface under the condition of stable operation of limit vacuum or rated vacuum (direct discharge atmosphere roots vacuum unit). There is no limit to the types of thermometers used to measure temperature rise, but they should have a measurement accuracy of ± 1 ℃. When marking the temperature rise, the room temperature at that time and the cooling conditions of the pump, including the cooling method, shall be indicated at the same time. If it is water-cooled, the temperature of water in and out shall be indicated.
The outlet pressure of Roots vacuum unit refers to the pressure measured near the exhaust port under the condition of stable operation of Roots vacuum unit, corresponding to a certain inlet pressure value. The test of the outlet pressure can be carried out at the same time with the measurement of the pumping rate, starting from the appropriate value close to the limit vacuum until the allowable inlet pressure of the pump is around. Measure the outlet pressure corresponding to each inlet pressure value.
The measurement position of the outlet pressure of Roots vacuum unit is specified in the standards issued by the Ministry. The distance between the pressure pipe and the pump outlet flange shall not be greater than the pump outlet diameter. The opening plane of the pressure pipe shall be parallel to the air flow direction. The insertion depth is 1 / 4D, but not more than 50mm.
The above contents are introduced in detail. If you have any needs in this regard, please contact us.

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