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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Q:explain the operation of a water pump....?
There are a number of different types of water pumps that operate according to different principles. For lots of information, including pictures and diagrams, do an internet search on water pump.
Q:Which water pump do you recommend?
I've never heard of those brands, but your TDH is going to be approximately 25 feet (ground to middle of the 3rd floor) plus 92' for pressure (40 psi). Ad at least 5' clearance head and that's 122' TDH. That's also 53 psi, meaning you'll want a pump that with an on-off of 40-60 psi. A centrifugal pump will do that. You'll probably want a minimum of 5-6 gpm. See if you can find a pump curve for the pumps in question and follow the vertical and horizontal lines on the chart and see if it will produce 6 gpm (or whatever volume you want) @ 60psi. Keep in mind that you can compensate for a pump that's a bit shy in volume with a larger pressure tank. Chances are most 3/4hp pumps will do what you need. If you don't have a pressure tank already or don't want to plumb a separate tank to the pump, look for a pump/tank combo. Then all you will have to do is plumb an intake and outlet line. A very good and very reliable American made pump like a Meyers should be way less than $700. The pump itself will probably be half that and a separate pressure tank approximately $175. Steer clear of Chinese made pumps. They may be ok, but finding parts like seals can be nearly impossible. Spending a couple of hundred extra dollars for an American pump will be money well spent when it's still running trouble free 10-25 years later.
Q:how do you change the water pump on a 96 3.5l dodge intrepid?
Well as far as I can tell you may not have to remove the crankshaft pulley but I could be wrong. You will however have to remove the timing belt and you might as well replace it anyway since you're in this far. I unfortunately I don't have enough details as the one I did was several years ago.
Q:water pump in 99 cadillac sts?
The water pump is what moves the coolant through the engine so if it is bad the coolant doesn't get to where it needs to go causing overheating. A bad thermostat will cause the same thing.
Q:car sounds like it is havent trouble to start when idle after replacing water pump?
Call or go up to your local Mitsubishi dealer, the techs should be able to show you a diagram or tell you where the marks are.
Q:Is there any problem with my water pump?
Jet pumps aren't particularly efficient, and at 10 years of age, it could be worn. However, the water table might be dropping, too (this is happening in a lot of places), and that alone could explain the longer time. Submersible pumps are much for efficient but more expensive to install.
Q:Suppose the liquid temperature range for the water pump is -20 .. 90 °C.?
(edited) The physical size of the pumping arrangement was not described. I assume that the pump has all metallic components because of the high (194 F) 90degC design operating temperature. There may be some problem with an elastomeric bellows in a mechanical seal at the 180degC (356F) temperature. Other than that, there should be no problem with the temperatures as far as the pump is concerned. There may be a need for shaft cooling to protect the standard electric motor and possibly the flexible drive coupling arrangement. (edit) Depending on the physical size, rotating speed and drive arrangement, a special coupling set-up may be needed to accommodate any potentially wide swing in operating temperatures. From ambient to 180degC there will be about a 160C (288F) variation. The liquid will be either a salt or a glycol brine solution for freeze protection at the lower temperatures. (edit) That same concentration will provide some elevation of the boiling temperature and therefore a reduction of the pressure of the water solution needed to prevent boiling. ( 130 psig is the saturation pressure of plain water at that elevated temperature.) This can be found on the charts provided by the glycol suppliers for the various glycol and salt solution characteristics. To prevent cavitation you may need to pressurize the suction. If the proposed pressure of the system is already above the vapor pressure of the solution at that maximum temperature, you may already be OK. A motor with high temperature windings may be considered.
Q:how can you tell if your water pump in your car is going bad?
There are 2 key indications that you have a bad water pump. #1 and most obvious is your engine should overheat. This wont take long since the water pump is what circulates the coolant to keep your engine cool so within a couple of minutes of starting the car you should see your temp needle go way up. #2 is a little tricky because if your leaking coolant/antifreeze it can be because of a bad waterpump or a cracked hose or even a cracked or damaged radiator. Your best bet if your overheating is to have a pressure test done that will inspect for any leaks in your cooling system. If that turns out ok then the waterpump is the culprit. Be ware though in many models a water pump although a simple part and fix can be extremely expensive due to where it is place and how difficult it is to get to. Most manufacturers placed the waterpump in an area that requires you to take many components apart in order to reach it and often it is wise to replace your timing belt while your at it to avoid future expenses because that is also where your timing belt is so I would strongly advise anyone who is replacing their water pump to replace their timing belt as well.
Q:The role of water replenishing pump in circulating system
In the circulatory system, the replenishment pump acts as a means of circulating water to the heating system and to supplement the water lost by the circulatory system. Most heating systems use a constant pressure pump to ensure that users of any degree of the system can normally cycle hot water.The fire unit is normally there are many, including the general use of the unit: water supply pump, fire pump, filling, pressure relief valve, pressure sensor, one-way valve, fire tank must maintain the required pressure, when the pressure drop or leak, the pressure sensor will fire a signal to the irrigation control cabinet, and control the cabinet module will give a water pump signal, such as a water pump after receiving the signal will immediately start running, to the fire in the irrigation water, irrigation water until the fire to the set pressure, the fire control cabinet will give irrigation pressure sensor signal, let the water pump will automatically stop running. Water pump and pressure regulating pump the same principle, are used for replenishment pressure.
Q:2000 bmw 323i water pump?
Mate you need to have a look under the thermastat housing on the front of the block remove the fresh air pick up and use a small mirror and light they can warp because they are plastic. You will notice a crusty stain. (This has happened to me) also the reservoir which you fill up can leak from small high pressues leaks to also dont over fill these bad boys as they dont have a over flow. best to get a mechanic to pressure test the cooling system to idenify the leak. as they are expensive to repair once they are really broken.

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