BOC E2M28, Инструкция по эксплуатации

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E2M28 and E2M30 Rotary Vacuum Pumps
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Issue K 35 Jul 05
5.11.6 The vacuum is not maintained after the pump is switched off
• The gas-ballast control is open.
• 'O' ring(s) are damaged or missing.
• The shaft seals have deteriorated.
5.11.7 The pumping speed is poor
• The connecting pipelines are too small in diameter.
• The connecting pipelines are too long.
• The inlet-filter is blocked.
5.11.8 There is an external oil leak
• The oil pump shaft seal is worn or damaged.
• The oil box gasket has deteriorated.
• There is an oil leak from gas-ballast control.
• There is an oil-leak from the drain-plug.