船用泵 船用泵 船用齿轮泵

Characteristic：
·SN three-spindle screw pump is of self priming(see NPSH attachment table)
·Because of the unit assembly system every pump can be supplied as cartridge pump for foot- ,flange-or wall mounting ,in pedestal- ,bracket-or submersible design.
·According to the delivery medium heated or cooled Designs.

Usage
·For the handling of oil and medium with lubricating pvoperties.

Application
·In heating techniqzzues as fuel oil injection ,fuel supply and transfer pumps.
·In the engineering industry as hydraulic- ,and telemotor pumps.
·In the chemical and food industry as cargo-,transfer or supply pumps.
·In the marine field as transfer-,booster-,fuel oil pumps as well for ship hydraulics.

Model code of screw pump of SN series


① Watching on drive end. If clockwise is required, Choose R. If counterclockwise is required choose L.

1 Type

Type	Main characteristics	Max capacity [l/min]	Size	Max delivery pressure[Mpa]
SN	Low pressure, single entry, spindles with hydr, balance of axial thrust	5300	40~5300	4.0

2 Design

Code	Description of design
H	horizontal foot mounted pump
F	flange mounted pump
S	vertical pedestal mounting pump
E	cartridge unit pump
T	Cartridge unit pump, to be pushed in from suction side with throttle bush.
G	Gear mounted pump without shafe sealing U-turn longitudinal.

3 size
4 pitch angle

规格 size	40	80	120	210	280	440	660	940	1300	1700	2200	2900	3600	5300
主杆螺旋角 Pitch angle	38	36	42	40	43	40	40	42	38	42	42	40	46	46
	46	42	46	46	46	46	44	46	42	46	46	46
	54	46	54	54	54	52	46	50	46
		54				54	51	54	54
							54

5 Special design feature and bearing and shaft seaing

符号 Code	结构说明 Description of design	适用范围 Usage
U12.1	内置滚动轴承，机械密封 Internal ball bearing me-chanical seal	介质润滑性好温度≤80℃ Pumping medium is of better lubricity temp.T≤80℃
K2	外置轴承，填料密封 External ball bearing packing shaft seal	介质润滑性较差，粘度大，温度≤150℃ Pumping medium is of less lubricity or higher viscosity temp.T≤150℃
E6.7	外置滚动轴承，机械密封，可用润滑喷嘴润滑 External ball bearing packing shaft seal	介质润滑性较差，工作温度高，T≤150℃ Pumping medium is of less lubricity or higher temperature. T≤150℃

6 Casing

符号 Code	说明 Description
无标记 No mark	标准泵体 Standard casing 适用于输送流动性好的润滑性液体 Used to pump the medium of better fluidity
Y	双层泵体可用热蒸汽或导热油作载体对泵内介质进行加热 Casing with jacker for steam or heated transfer liquid to heat up the medium 适用于输送高粘度及流动性差的液体，介质温度≤280℃ Used to pump the medium with higher viscosity or less fluidty ※ 详见焊接高温三螺杆泵样本。

Required datas to order
1）Temperature of the medium TO
2）Viscosity of the medium at the temperature V
3）Pressure at suction （or suction vacuum） P1
4）Pressure at outlet P2
5）Delivery
6）Design of pump
7）Driving unit

Notation of screw pump selection
1 According to the medium viscosity, select the suitable Rotation Speed of pump, to guarantee the NPSHr of pump is suited to the suction state.
2 When the medium viscosity v>760mm2/s, please consult with us.
3 With the characteristic table you can get the power of the selected pump N the power of the motor is Nm.
                        Nm≥K·N
refer to following table

N(kw)	N≤5	5 < N≤10	10 < N≤50	N>50
K	1.25	1.2	1.15	1.1

材料组合代码 Material code	泵体 Casing	衬套 Insert	适用范围 Using range
W1	HT200 Cast iron	稀土铜钼球铁 Special modularcast iron	可中低压输送润滑性较差，粘度适当的液体，如燃油等 Used to pump the medium (such as lubricant oil) with less lubricityand suitadle viscosity at lower pressure
W2	HT200 Cast iron	ZL109 Cast AL	可中低压输送润滑性好、粘度适当的液体，如润滑油等。 Used to pump the medium (such as lubricant oil) with better lubricity and suitadle viscosity at lower pressure.
W3	QT450-10 Nodular cast iron	ZL109Cast AL	用于特殊场合(如船用泵)中低压输送润滑好，粘度适当的液体， Used in particulat case, such as marine pump, to pump the Medium (such as lubricant) with better lubricity and suitadle viscosity at lower pressure.
W5	QT450-10 Nodular cast iron	稀土铜钼球铁 Special modularcast iron	用于特殊场合(如船用泵)中低压输送润滑性较差，粘度适当的液体，如燃油等。 Used in particulat case, such as marine pump, to pump the Medium with less lubricity and suitadle viscosity as fuel oil at lower pressure.
W21	HT200 Cast iron	ZcuSn5Pb5Zn5 Special bronze	可在较高压力下输送润滑性较差，或粘度较低的液体。如重油、燃油、柴油等。 Used to pump the medium with less lubricity and lower viscosity, such as heavy oil and fuel oil.
W23	QT450-10 Nodular cast iron	ZcuSn5Pb5Zn5 Special bronze	用于特殊场合(如船用泵)在较高压力下输送润滑性较差，粘度较低的液体，如重油、燃油、柴油等。 Used in particulat case, such as marine pump, to pump the Medium with less lubricity and lower viscosity, such as heavy oil and fuel oil, at higher pressure.
W29	20(焊接组件)	ZcuSn5Pb5Zn5	仅用于SN5300 Only for size 5300