量的50％-120％。

  Quantity of flow of the pump should be kept within the allowable extent recommended by the manufacture．This extent is generally 50％to 120％of the rated quantity of flow．

4.2.3注意軸承溫升，軸承體外表溫度不應(yīng)超過(guò)75℃，軸承溫升不超過(guò)35℃。

  Take care of the temperature rise of the bearings．Surface temperature of the beatings should not exceed 75℃，while the temperature rise should not exceed 35℃．

4.2.4停機(jī)后應(yīng)關(guān)閉出口閥，在運(yùn)轉(zhuǎn)中如遇突然停電，則應(yīng)先切斷電源，后關(guān)閉閘閥。

    After the pump is stopped，the outlet valve should be turned off．If power supply fails suddenly during operation，the power switch should be turned off first and then turn off the outlet valve．

5.1．泵進(jìn)口管應(yīng)裝濾網(wǎng)，以防止堵塞泵體和葉輪，影響正常工作。

    The filler should be installed at the inlet pipe to prevent the non-return valve in the pump body from being blocked by rubbish．

5.2．在運(yùn)轉(zhuǎn)中隨時(shí)注意是否有異常震動(dòng)、噪聲。

  During operation take care all the time whether extraordinary vibration noise exists．

5.3．泵要長(zhǎng)期停止使用時(shí)，應(yīng)擰開底部螺塞，將泵內(nèi)的積水排干凈。

  If the pump is going to be out of use for a long time，the screw plug at the bottom ofthe pump body should be unscrewed to let the inside water out.

5.4．泵的軸承每三個(gè)月要加注一次黃油。每一萬(wàn)小時(shí)后檢查軸承滾珠是否有剝落的現(xiàn)象，必要時(shí)予以更換。

  Lubricating grease should be added to the bearing of the pump every three months．The surface of the ball bearings should be examined whether exfohation occurs after every 10,000 hours of use．Replace the bails when necessary．

5.5．烈本和泵蓋上的啪侖密封環(huán)掣特次磨捌煸蝕情況，必要時(shí)應(yīng)予以更換。

  The situatiOn of wear and tear and corrode of the seal ring of the valve on the pump body and the pumP cover should be examined for every year,replace the seal ring when necessary．

5.6．機(jī)械密封每年檢查一次，必要時(shí)予以更換。

  The machinery sealing should be examined for every years，replace it wnen necessary．