WRG Waterring Pelletizer

The waterring pelletizers from Coperion have been in successful operation for many years. They are the result of long years of development work and are suitable for the pelletizing of most thermoplastics, including filled and reinforced products.

In waterring pelletizers, the cooling and transport medium, water, does not come into contact with the die plate. The circulating knives cut the melt strands and fling the hot molten pellets into the circulating waterring. The water flow conveys the pellets out of the pelletizer hood.

Waterring pelletizers have a very compact design and feature low investment and operating costs as well as a simple start-up process.

: WRG waterring pelletizer from Coperion

Technical data of the WRG water ring pelletizer

WRG water ring pelletizer	WRG 280	WRG 300	WRG 320	WRG 400
Max. number of die plate bores	208	334	604	992
Max. permissible pressure of the heating medium* [bar]	32	32	32	40
Max. number of knives	6	6	6	8
Max. knife speed of rotation [min^-1]	3,200	3,200	3,200	2,500
Drive power / min. installed motor power [kW]	7.5	9.2	17	30
Water circulation rate [m³/h]	90	90	120	200
Max. throughput rate ** [t/h]	3	4.5	7	12

: Waterring pelletizer from Coperion

Special features and advantages of the waterring pelletizer

Simple start-up process

Even die plate temperature

No freezing of bores at low hole throughput

Uniform pellets with simple die plate design

Low pressure build-up of the die plate

Nozzle geometry is widely variable

No cavitation on the die plate

Compact design

Low investment costs

Low operating costs, among other things due to low energy requirements for heating and drive, low wear, low-cost spare parts and simple operation

All parts are salt bath-resistant