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Hydraulic Power Unit activates slide plates or valve pistons.

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Hydraulic Power Unit activates slide plates or valve pistons.
Hydraulic Power Unit activates slide plates or valve pistons.
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September 24, 2013 - Utilizing 2 pumps that are capable of operating simultaneously, Hydraulic System overcomes resistance during slide plate or diverter valve operation without need for pressurized hydraulic oil accumulator. Pumps are supplied from single oil reservoir and are driven by single motor. Volume flow pump draws on larger volume of oil to provide fast movement when level of resistance is low, while high-pressure pump uses less oil but generates pressure buildup that overcomes high levels of resistance.

Two-Stage Hydraulic for Activating Slide Plates or Valve Pistons Eliminates Need for a Pressurized Oil Accumulator


Nordson Corp., Packaging Systems
11475 Lakefield Dr.
Duluth, GA, 30097
USA



Press release date: September 16, 2013

New-Design System from Nordson KREYENBORG Has Two Hydraulic Pumps and an Un-pressurized Oil Reservoir, Savings Costs and Avoiding Need for Mandated Safety Inspections

MÜNSTER, GERMANY, -- A hydraulic power unit with two pumps effectively overcomes resistance during slide plate or diverter valve operation without need for a pressurized hydraulic oil accumulator, it was announced today by Nordson KREYENBORG GmbH, which will introduce the system at K 2013 (Hall 9, Stand A44-48).

The new system eliminates the costs associated with maintaining pressurized accumulators, as well as the additional costs and complications entailed by the safety inspections required for such accumulators. (Inspections must be carried out every one to two years in Belgium, for example, and every five years in Luxembourg and Germany.) In addition, the two pumps in the new Nordson KREYENBORG system are supplied from a single oil reservoir and are driven by a single motor, simplifying the design and reducing the initial investment.

In a conventional hydraulic system for slide plate screen changers, a pressurized accumulator is required to overcome the resistance caused by residual degraded or baked-on polymer, which can otherwise impede the movement of  slide plate in a screen changer or of the bypass, start-up, and switch-over valves used in various polymer processing applications. The Nordson KREYENBORG system makes possible similarly rapid action in these devices while avoiding the maintenance, costs, and safety issues of a pressurized accumulator.

The new system utilizes two hydraulic pumps that are capable of operating simultaneously. One, called the volume flow pump, draws on a larger volume of oil to provides fast movement when the level of resistances is low. The second, called the high-pressure pump, uses less oil but generates a pressure buildup that overcomes high levels of resistance. The two pumps are controlled via an automatic switching valve that shuts either pump on or off as required. They can work in concert—for example, if the resistance to a screen changer slide plate becomes higher at the end of its movement, the high-pressure pump is activated.

Founded in 1953, the Kreyenborg Group is a leading international supplier of polymer processing systems. In 2013, Nordson Corporation acquired the KREYENBORG GmbH business, which manufactures melt filtration systems, gear pumps, and melt valves; and BKG BRUCKMANN & KREYENBORG GRANULIERTECHNIK GmbH, which produces underwater pelletizing systems.Both are now part of Nordson’s Polymer Processing Systems product offering. Visit www.kreyenborg.com.

Nordson Corporation (Nasdaq: NDSN) engineers, manufactures and markets differentiated products and systems used for the precision dispensing and processing of adhesives, coatings, polymers and plastics, sealants, biomaterials and other materials and for 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 www.nordson.com, www.twitter.com/Nordson_Corp or www.facebook.com/nordson.
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