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Accuracy and repeatability in precision dispensing and dosing with preeflow® from Intertronics

The method of using a positive displacement technology for the dispensing or dosing of liquids can bring many benefits to those for whom repeatability, precision, reliability and accuracy are important. Preeflow volumetric dispensing pumps have found applications in sectors such as electronics and semiconductor manufacturing, aerospace, medical device assembly and pharmaceuticals – from the application of small quantities (microlitres) of adhesive to the dosing of fluids into vials. The assurance that the dispensed volume will always be the same to within a high level of tolerance is very valuable to critical processes.

An example of where Preeflow’s volumetric dispensing capability meets an industry need is in the application of adhesive in medical catheter manufacturing. Adhesives are used in the bonding of balloons and hubs to lumens, marker bands, and manifolds and connectors. This is an industry where accuracy and repeatability are of paramount importance in achieving a consistent, validated process. Since the nature of the assembly means that full automation is not always feasible, the bonding process can be manual. Catheters have small bond areas, and squeeze out or witness of excess adhesive would be unacceptable, so adhesive placement and amount need to be precise. The use of a Preeflow eco-PEN, triggered by a foot pedal, gives the assembly operator more control of this intricate operation and confidence in the adhesive amount.

Preeflow volumetric pumps dispense from the microlitre range on up, to an accuracy of +/- 1 per cent independently of viscosity, while exhibiting low shear force on any media. They can dose continuously at rates up to 60ml per minute. The direction of flow can be reversed leading to clean cut off of the material, preventing drips or stringing.


INTERTRONICS supplies a comprehensive range of bonding and protective materials – together with the associated consumables and equipment – to customers in high technology, high performance assembly industries – including electronics, medical device, plastics, optical, automotive, energy, defence and aerospace.

INTERTRONICS supplies adhesives, coatings, sealants and equipment to customers with high technology, high performance assembly applications. Our customers are manufacturers in industries such as electronics, medical devices, plastics, optical, automotive, energy, defence and aerospace.

We specialise in adhesives and adhesive systems, namely bonding, coating, sealing, encapsulating, potting, masking and gasketing products, together with the most appropriate equipment and accessories for surface preparation, mixing, application, dispensing, and curing them. The provision of insightful technical and applications guidance is a cornerstone of our business. We help you find the optimal materials and processes for the manufacture, assembly or repair of your products, safeguarding and enhancing performance and integrity and, in turn, your profitability and reputation.

Ever since being established in 1979, when our main market was the printed circuit board assembly industry, we have enjoyed a reputation for customer focus, excellent service and post-sales support. We now supply over 3,000 regular customers, including multinational manufacturers, production facilities, specialist design and development businesses, universities, training organisations and government establishments.

Our Technology Centre, located in Oxfordshire with excellent road and rail links, is custom-designed for hands-on demonstrations and trials, hosted by our product specialists.

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