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Dragon Manufacturing and Automation Gears Co., Ltd.

Ask DMAG for any inquiries about gear pump and extrusion system
Mimuro 2607-9, Midori-ku, Saitama-shi, Sitama, Japan



Bolt type screen changer (BSC) consists of 2 ways channel and 2-bolts of each 1 filter, and bolts are operated by hydraulic piston. This means that one bolt is changed filter and another bolt is continued filtering operation.This operation can be executed without stopping the extruder system.


DMAG suggests the new installation of the screen changer to be installed on the down-stream of gear pump.

This enables the extrusion system to lower the discharge pressure to 30-50 bar, and results in a 30% energy-saving. And lowering discharge pressure leads to lowering polymer temperature which is conducive to the increase in productive capacity of the extruder.

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 BSC Feature  

Since the extruder line is able to continue the production at the time of changing filters for BSC, the line maintains high productivity.

- 2steps venting enables continuous production. 

- 2 filtering area shorten lower pressure-up at increased through put.  

- Cartridge heaters in bolts and housing make S/C heat-up time and simplify temperature control

 BSC Specification 

DMAG deals with a various kinds of components for extrusion system and internally-designed gear pumps, and provide maintenance service.


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