Roots meter maintenance tips
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1, the head should have a certain amount of lubricating oil, lubricating oil is generally silicone oil or arsenic oil.
2, should be regularly on time inspections, listen: whether there is noise running; see: header mechanical register whether there is no jam, record is continuous.
3. The filter should be cleaned once every six months. Whether the filter is clogged is judged by the pressure difference between the inlet and outlet. General pressure difference more than 0.07MPa should be cleaned.
4. The head gear transmission part should be cleaned, inspected, lubricated every year, and the meter head should be adjusted.
5. The temperature compensator accuracy corrector should be checked once a year, and the gear transmission part should be cleaned and lubricated.
6. Use within the scope of the flow meter shall not exceed the limit; overload 20% must not exceed 30 minutes, otherwise it will reduce the measurement accuracy.
7. Do not reverse the flow of fluid. The indicator on the display of the on-site display or the reverse rotation of the counterwheel of the counter should be checked in reverse to prevent accidents.
8. The filter shall be a 40 or 60 mesh/inch stainless steel wire mesh.
9, should check the magnetic seal coupling or mechanical seal coupling transmission and magnetic conditions, check the magnetic field strength is enough, not enough time to update the magnetic steel.
10. Before activating, slowly open the bypass valve first, then open the inlet valve of the flowmeter, and then open the outlet valve. Open the outlet valve and pay close attention to the moving speed of the flowmeter pointer. After normal operation, close the bypass valve. Abnormal, should immediately open the bypass valve, while closing the inlet and outlet valves, check processing.
11. After the Xinan pipeline or maintenance, one day after the commissioning, the filter must be opened to remove impurities. In normal use, light oil for six months and heavy oil for three months must be cleaned once. Never use steam to purge the flowmeter.
12. When replacing graphite bearing, the maximum clearance of flowmeter of DN50 should not exceed 0.1mm; for flowmeter of DN150, the maximum clearance should not exceed 0.2mm; the clearance between upper and lower cover and rotor and the cavity of rotor and measuring box should be The maximum clearance should not exceed 0.15mm.
13. Maintenance When disassembling, important parts should be marked so as not to be wrong.
