What is the difference between oil filled and water filled submersible pumps?Which one is better？

overview

As the name implies, the motor cooling method of the water-filled submersible pump is filled with water internally, while the motor cooling method of the oil-filled submersible pump is filled with mechanical oil internally, both of which have strong cooling capabilities and have strong Water resistance.

Main difference：

	oil-filled submersible pump	water-filled submersible
Type of electric coolant	Machinery oil	Water
Environmental impact	Cause Oil pollution	No pollution
application	Water tower water delivery, flood prevention and drainage, municipal construction drainage	Groundwater pumping,water supply system,circulation or boosting for clean water
Service life	They are lubricated with mechanical oil, which has better lubrication conditions than water-filled pumps and often has a longer service life.	Shorter life than oil-filled submersible pumps.
Price	More expensive under the same brand, power, head, and flow conditions	More cheap under the same brand, power, head, and flow conditions

The QY series oil-filled  submersible pump introduction:

The QY series oil-filled  submersible pump is composed ofa pump head,  a seal and a motor. The pump head is located in the upper part of the submersible pump and has a centrifugal or axial flow structure. The  motor is an oil-filled three-phase asynchronous motor located at the lower part of the submersible pump. The submersible pump and the motor are sealed by a built-in integral mechanical seal box, and the fixed seals are sealed by O-shaped oil-resistant rubber seals.

QY Oil filled submersible pumps Parameters: Flow range：10~100m3/h, Head: 5~120m; Outlet diameter: 50~150mm, Temperature range<=40° C.	QJ series water-filled submersible pump performance range: flow: 5-1000m3/h, head: 10-600m, motor power: 2.2-410kw, rated voltage: 220/380/460/660v, pump diameter: φ150-φ600mm, water temperature < 105℃, solid content: ≤0.01%, insulation grade: F, pump material: Cast iron/ss304/ss316/ss316L/duplex stainless/ss904l

QY Oil filled submersible pumps use conditions:

• Submersible pumps submerged depth of not more than 5 m;
• Water temperature does not exceed 40 ° C;
• Water sediment or water insoluble solid mark of the volume ratio of not more than 0.1%, particle size less than 0.2mm, no corrosion, water pH value of 6.5 ~ 8.5
  Application :
• QY Series submersible pumps widely used in industrial and civil buildings, also the drainage system to level hills, mountain diversion and in low-lying areas dunes, urban and rural mining supply, drainage and other water conservancy facilities. Characteristics are that they are assembled into a simple structure they have installation convenience a small footprint, simple maintenance .

The QJ series water-filled  submersible pump introduction:

QJ series submersible  pump is a high-efficiency energy-saving water-lifting tool that combines a pump and a pump to work in the water. It consists of a submersible motor, a pump head, and a meal.  The motor is a vertical water-filled squirrel-cage three-phase asynchronous motor. The interior is filled with clean water. For cooling motors and lubricating bearings.

QJ series water-filled submersible pump performance range:

flow: 5-1000m3/h, head: 10-600m,

motor power: 2.2-410kw, rated voltage: 220/380/460/660v,

pump diameter: φ150-φ600mm, water temperature < 105℃,

solid content: ≤0.01%, insulation grade: F,

pump material: Cast iron/ss304/ss316/ss316L/duplex stainless/ss904l

QJ series water-filled submersible pumps have the following characteristics:

1. Motor and pump are Integrated, simple structure

2.Easy to install ,use,disassemble and maintain

3.Taking little floor space, no pumping stations need to be buil

4.No pollution to water source

So, no matter which submersible pump type has its own advantages and disadvantages, we need to determine the submersible pump type according to the customer’s actual use situation and needs.If you have no idea how to choose a suitable model submersible pumps, welcome to send inquiry or chat with us anytime!