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6. Operating instructions
6.1 Preparations before starting
① Check the cooling water pipe is open.
② Check there have enough lubrication oil in end cover A and end covers B, make sure the oil
should be reached to the oil level of oil mirror. The oil cup of oil sealing should be filled full usually
and keep clean. New pump’s oil must be changed after operating30 ～ 50 hours. After then, the
oil can be changed according to the operating condition.
③ if there have dust and other metal powder in the exhausted gas, anti-dust or filler devices
should be installed in front of air inlet port. If there have corrosive gas in exhausted gases, some
neutralizing measures should be adopted.
④ Check there have no any loosening in various parts .Motor’s rotational direction should be
in accordance with arrow direction on a pump.
6.2 Starting
① Start the pump
② Open the gas inlet valve of this pump
③ Open the water cooling valve and start this pump.
④ The pump should be in a stable operation and the rotor without crash. Or should be stopped.
⑤ There is no leakage in the oil –sealed position of a pump’s shaft.
⑥During the operating, if the temperature rise is too high ,the reading of current meter is
suddenly changed, an abnormal noise or other unusual phenomena appears ,the pump should be
stopped immediately.
6.3. Stopping
① Close gas inlet valve which on inlet port at first.
② Stop pump (and close the inlet valve ）
③ Stop the fore pump
④ Close the water inlet valve of water cooling pipe.
⑤ If the pump’s operation is stopped for a long time or its operating in a cold zone, the cooling
water must be drained out completely.
Otherwise, the cooling water will be frozen and make the pump’s castings in frost crack.
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