W / V series double suction double screw pump


* Delivery various medium smoothly without any disturbing and pulsation. There are medium to be pumped through out in the working elements as sealing liquid which guaranteed by the construction of pump casing. All of the pump possess high self priming ability and can deliver the liquid mixed with gas or air.

* The high suction performance, i.e. very low NPSHr was guaranteed by the special design of pump.

* Adopted the external bearing which lubricated individually, so can deliver various non-lubrication medium.

* Adopted synchronous gear, there is no metallic contact between rotating parts, there is no dangerous even dry running in a short time.

* Various construction completely such as horizontal, vertical and casing with liner, and so on. The pump can handle various clean liquid without solid grain, low or high viscosity medium, even can deliver some corrosive medium with a correct material selection.


* Handling various medium without solid.

* viscosity:1-1500mm2/s,the viscosity can reach up to 3×106mm2/s when reduced the speed.

* Pressure range:4.0MPa

* Capacity range:1-2000m3/h

* Temperature range:-15℃-280℃


* Ship building:used for marine as cargo and stripping pump, ballast pump, lubricating oil pump for main machine, fuel oil transfer and spray pump, load or unload oil pump.

* Power plant: heavy and crude oil transfer pump, heavy oil burning pump.

* Chemical industry: transfer for various acid, alkali solution, resin, color, printing ink, paint glycerin and paraffin wax.

* Oil refinery: transfer for various heating oil, asphalt oil, tar, emulsion, asphalt, and also loading and unloading various oil goods for oil tanker and oil pool.

* Food industry: used for brewery, food products factory, sugar refinery, tin factory to transfer for alcohol, honey, sugar juice, toothpaste, milk, cream, soy sauce, vegetable oil, animal oil and wine.

* Oil field: transfer for various oil goods and crude oil and etc.


One Series code specification:

W---horizontal pump          V---vertical pump

Two Size and variety code specification:

The pumps imported from Bornemann of Tianjin Pump & Machinery Group Co., Ltd are divided into two

constructions: horizontal and vertical, there are 2,3,4,5,6,7,7T,8,9,10sizes and altogether 10.

The combination of sizes and variety is showed as following table:

Three Type code specification:

Bornemann twin screw pump has 3 main constructions:Z、ZK and Zi.

Z—long shaft design:Packing seal, double end seal or metal seal is required in design, when the medium temperature exceed 150-200℃.

ZK—short shaft design:adopt mechanical seal, medium temperature<120℃<>

Zi—Internal bearing design:adopt mechanical seal, medium temperature <80 , only used for delivery

lubricant medium.

※Welded pump can deliver the high-temperature medium reach to 280℃.

Four、Heating method of pump casing specification:

The different pump casing heating methods of Bornemann twin screw pump depend on whether the pump casing is cast or welded.

Adopt heating to the middle section of the pump casing for all pump casing which is welded. Adopt different heating method with different size, all cast pump casing is showed as following table:

Seven Features of welded twin screw pump:

Welded twin screw pump has features as follows:

1.Well heated and the pumping temperature: -50℃ +320℃.

2.Of the same pump the materials of different sections can be not the same. So it can pump

mix-rotation and corrosive medium, lower the cost greatly.

3.Especially suitable for high-temperature system and some special condition, for example high viscosity, high temperature radium, such as oil, residue oil, etc. the highest viscosity can reach 106mm2/s