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Optigon Water Filtration System

Nordson Will Highlight Its Energy-Saving Optigon™ Process Water System as Part of the BKG® Pelletizing System Featured at Chinaplas

SHANGHAI, March 3, 2021: BKG® pelletizing and melt delivery equipment from Nordson Corporation are emerging as more advanced alternatives for meeting the strong demand in China for ABS and SAN resins. The company will highlight this equipment at Chinaplas 2021, with a special focus on the Optigon™ process water filtration system, which dramatically reduces energy use in underwater pelletizing (Hall 10, Booth 21).

While BKG underwater pelletizers (UWPs) are used for a wide range of olefin and styrene polymers, producers of ABS and SAN materials have traditionally used strand pelletizers. In comparison, UWPs yield enhanced pellet quality, are more compact, generate less dust, are not affected by strand breaks, and are more capable of automation. In addition, Nordson supplies key ancillary systems designed for high-volume pelletizing lines with minimal downtime. These include BKG BlueFlow™ melt pumps, which provide uniform melt pressure at levels required for efficient pelletizing; and BKG LK-SWE dual-piston melt filtration systems, which maintain continuous production during screen changes.

The BKG Optigon process water filtration system removes dirt and fine particles from the water used in underwater pelletizing while reducing overall energy consumption by 10 to 17%.

“Demand for ABS and SAN is now growing most rapidly in China, where the toughness and surface aesthetics of ABS are needed in the surging market for durable consumer goods and automotive components, while SAN provides strength and optical properties valued in consumer electronics,” said Aaron Kong, sales director of pelletized systems for Greater China. “We have supplied our BKG pelletizing systems to resin manufacturers in China and neighboring countries, and we support these customers from the Asian headquarters of Nordson’s Polymer Processing Systems division in Shanghai. Our pelletizing laboratory here is available for product demonstrations and customer trials.”

Substantial Energy Savings in Underwater Pelletizing

The Optigon water filtration system eliminates need for a separate fines-removal sieve, which in standard systems requires a secondary, dedicated water pump. Instead, all filtration is provided by a drum filter, whose 70-micron screens are finer than the 150-micron screens used in standard systems. Driven by a small motor, the drum rotates within the water that is circulated throughout the pelletizing system by the main process water pump. The filtration system is designed so that dirt and fines stay confined inside the drum until they are evacuated into a collecting basin outside the tank.

By eliminating the secondary pump, the Optigon water filtration system uses only 1,440 kW per year (measured at 8,000 hours), as against 44,000 kW and 98,480 kW for the company’s Opti-Line™ and Poly-Line™ systems, respectively. Since water filtration typically accounts for 10 to 17% of the energy consumption in underwater pelletizing, the energy efficiency of the Optigon system means that overall consumption is cut by nearly that much.


Nordson Corporation engineers, manufactures and markets differentiated products and systems used for the precision dispensing of adhesives, coatings, sealants, biomaterials, polymers, plastics and other materials, fluid management, test and inspection, UV curing and plasma surface treatment, all supported by application expertise and direct global sales and service. Nordson serves a wide variety of consumer non-durable, durable and technology end markets including packaging, nonwovens, electronics, medical, appliances, energy, transportation, construction, and general product assembly and finishing. Founded in 1954 and headquartered in Westlake, Ohio, the company has operations and support offices in more than 30 countries. Visit Nordson on the web at, @Nordson_Corp, or

Nordson Polymer Processing Systems provides customers with engineered components to pelletize, filter, meter, and give shape to plastic and fluid coating materials. Nordson Corporation leverages the collective plastics industry experience from a series of strategic acquisitions to offer a uniquely broad portfolio of industry-leading technologies. Nordson delivers a full range of precision melt stream products from filtration systems, pumps, and valves to the extrusion dies and pelletizing systems to meet the constantly evolving needs of the polymer industry.

Nordson Corporation provides customers with local technical sales, service and remanufacturing capabilities through sales organizations and regional manufacturing facilities in over 30 countries. To learn more visit us at,,