Seawater Submersible Pump

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Product Description:

Type description:

Take AT350QH450-115/5 as an example

AT: brand name

350: minimum well inner diameter that can apply to (mm)

Q: submersible

H: seawater

450: flow capacity (m3/h)

115: head (m)    5: impellers


AT350QH series submersible pump for seawater is suitable for offshore platform fire-fighting, thermal dissipation, seawater desalinization, seawater lifting, coastal square fountain, mariculture and attemperation as ground source heat pump in coastal area.

Technical parameter:

Max. outer diameter: 330mm; Outlet diameter: DN200

Outlet connection parameter: 12 threaded studs M16×75, bolts center distance:256mm.

In order to install easily, we particularly have equipped with a matching flange (outer diameter: 282mm, inter diameter: 220mm, thickness:20mm) consistent to the outlet.

Medium Range:

1 All kinds of seawater, alkaline corrosive water, clean water, cold water, rainwater, gushing water of mining, drinking water, etc.

2 Water temperature range: +5--+25

3 Solid content (mass ratio): ≤0.01%

4 PH: 7.9-8.6

5 Full set should be submerged in water.

Motor Parameter:

The submersible motor is lubricated by clean water. It must be filled with clean water or its service life will be lessen. If you forget filling, the motor will be broken.

Motor protection level: IPX8

Power Source:

Voltage: 380v, frequency: 50Hz or Voltage:660v, frequency:50Hz

If you need special voltage or frequency, please inform us in advance.


Impeller: tin bronze, such as ZCuSn3Zn8Pb6Ni1

Pump bowl: tin bronze, such as ZCuSn3Zn8Pb6Ni1

Pump shaft: stainless steel 316L. Filter: 316L.  Bolt:316  Flange:316

End bell (upper and lower): 316;  Middle part:316   Motor shaft:316

Motor Seal: Rubber O-ring seal, mechanical seal

Motor regulating sleeve: rubber


1 Easy installation

2 Low noise, multistage

3 Built-in check valve avoiding water hammer impact.

4 High head with single stage, strong stability, the shaft diameter φ50mm, improving the equipment’s torsional property. Bearing liner is made of natural rubber and more wear-resisting, meanwhile we attach with imported hard bearing liner.


AT350QH series submersible pump for seawater (including the body and motor), built-in check valve, 1 flange matching outlet, 12 threaded studs M16×75, 1 maintenance instruction, 1 conformity certificate,1 packing list, external packing.

Friendly reminder:

For the customers’ convenience and our products’ quality, all the related products are manufactured by ourselves. The products detailed information are as follows:

a.         All kinds of lifting pipes including high-frequency welded pipes (dia.25mm-500mm); Connection type: flange connection, screw connection and clamp connection. They are made accurately by machine tools.

b.        Pipe clamp: the length is 50mm-500mm (we can produce the other different spans according to your requirements).

c.         Wellhead devices: return flow wellhead instruments (applied to ground source heat pump), general pump seat (we have innovated and designed this kind of pump seat by replacing the original iron castings with steel plate welding; the cable lead-in hole has also been improved by substituting the U hole for middle lead-in hole, thus making more convenient for the customers.)

d.        Desanderavoiding blocking and polluting by sand in water. And it contributes to long service life.

e.        Related products: submersible cable, starting cabinet, frequency conversion cabinet, transformer, electric generating set, etc.

f.          According to the conditions on the spot, we also supply the design proposals about pipe network, tank and installation.

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