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  積水回流，進(jìn)口設(shè)有止回閥

。部分型號(hào)還設(shè)有底閥
，根據(jù)用戶使用情況，可裝底閥或不裝
，裝底閥時(shí)應(yīng)卸下螺塞
。

  Screw plugs  are placed at the top and the bottom of the pump bodv respectively for pouring or discharging Water．To avoid the return flow of the water m the pump when the pump stops，a non-return valve is installed at the irdet．A bottom valve is also installed in pumps of certain model．It can be installed or not according to the customers uses．When it is installed．the screw plug should be unscrewed．

3
、泵主要零件材料Materials of the Main Parts

 

材    料    Material

零件名稱

Name of parts

 

 

海水

Sea water

海輪淡水

Fresh water for

seagoing ship

內(nèi)河輪淡水

Fresh water for

inland fiver ship

泵體

、泵后蓋Pump Body,rear prop cover

 

ZcuZn16Si4

 

QT450-10

 

HT200

葉輪、密封環(huán)Vane

wheel,Sealing ring

 

ZcuZn16Si4

 

HT200

托架

、聯(lián)軸器Bracket,

Shaft coupling

 

QT450-10

 

HT200

填料壓蓋Gland

ZcuZn16Si4

QT450-10

HT200

軸套Shaft sleeve

QA19-4

45

軸Shaft

1Cr18Ni9Ti

底座Base

Q235-A焊接件(weld assembly)

 

4．運(yùn)轉(zhuǎn)Operation

4．1運(yùn)轉(zhuǎn)前的準(zhǔn)備Preparation for operation

4．1.1起動(dòng)泵前先盤動(dòng)泵軸

，確信轉(zhuǎn)子無(wú)卡住及磨擦現(xiàn)象。

Before starting the pump，turn the pump．shaft by hand．Make sure thatit Can revolve smoothly．

4．1.2全開進(jìn)口閥

。Turn on the inlet valve fully．

4．1.3打開出口閥或出口彎管上測(cè)壓孔

，或打開出口閥的  南開度以便在自吸時(shí)排氣。

Tum on the outlet valve or the pressure measuring hole at the outlet bend or turn on the outlet valve 1/10 so as to discharge air when the pump is self-sucking．

4．1.4第一次起動(dòng)時(shí)應(yīng)擰開泵體頂部的螺塞

，將泵體內(nèi)灌滿水
，嚴(yán)禁未加水