Medical Devices: Valve-less Piston Pumps Instead Of Syringe Pumps?

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Diener Precision Pumps presents a cost- and performance-optimizing alternative to traditional syringe pumps.

Ceramic piston by Diener Precision Pumps

Ceramic piston with both rotary and linear movement

Ceramic piston pumps, which support both rotary and linear movement and use longer displacements and higher speeds, meet all necessary requirements.

Fluid systems in medical devices are becoming compact and more sophisticated. The traditionally used syringe pumps seem no longer able to keep up with the new requirements in terms of size, cost and performance. Valve-less piston pumps that combine the benefits of syringe pumps with lower cost and higher performance, could be the solution of the future. Diener Precision Pumps will present a live demo of valve-less piston pumps at the AACC Annual Meeting & Clinical Lap Expo in Atlanta, Georgia/USA in July.

Historically, syringe pumps have long been the mainstay in dispensing and metering applications because they can be accurately controlled and have very good dispense accuracy. An additional benefit is their inherent high pressure capability. On the down side, they are costly and bulky and require a long refill time.

Ceramic piston pumps with rotary and linear movement
The Swiss quality manufacturer of gear pumps and piston pumps Diener Precision Pumps has developed an alternative solution for medical devices. John Bishop, Director of Sales and Marketing at Diener Precision Pumps, explains: ”Ceramic piston pumps, which support both rotary and linear movement and use longer displacements and higher speeds, meet all necessary requirements. The pump can fill quickly and still dispense with high accuracy, following a sinusoidal dispense/fill curve.”

Long life, less costs and accuracy over time
By carefully designing the pump´s geometry, life-limiting check valves are eliminated. This increases pump life and reduces cost. Accuracy is maintained using very tight operating clearances, typically in the 2-3 micrometre range. In addition, ceramic is extremely strong and can only be treated with diamonds. Ceramic pumps can therefore be used over the entire life-cycle of an appliance without losing precision and dispensing accuracy. Later adjustments and maintenance services are not needed. Typically, the only wetted parts are alumina ceramic, PTFE, and a polypropylene seal material. The wear of the mating ceramics is undetectable after thousands of hours of operation, meaning that the pumps maintain their accuracy over time.

Great deal of design flexibility
A variety of piston sizes and strokes, combined with adjustable displacement features built in to the pump head give the end user a great deal of design flexibility. The inherent design simplicity allows fewer parts and a wider selection of inert materials. Sensors can be included to monitor speed, temperature, and pressure/vacuum. Combining these features reduces initial costs and results in a very long life fluid delivery system.

Live demo at the AACC Annual Meeting & Clinical Lab Expo, 26-30 July 2015, Atlanta/USA
The next opportunity to get a live impression of Diener Precision Pumps´ valve-less piston pumps will be the upcoming AACC Annual Meeting & Clinical Lap Expo in Atlanta, Geogia/USA. As last year, Diener Precision Pumps will be present with an exhibition booth.

About Diener Precision Pumps
Diener Precision Pumps is a Swiss quality manufacturer of precision pumps. The privately owned engineering company, run by engineers for engineers designs and manufactures piston pumps and gear pumps for OEM fluid handling systems worldwide. Superior performance, long life and quality as well as a high cost-effectiveness characterize the products of Diener Precision Pumps. All piston pumps and gear pumps are tailored exactly to the individual customer application. The precision pumps are developed at Diener Precision Pumps’ center of innovation in Lodi, California, and are produced at the company’s headquarters in Embrach, Switzerland.

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Audrey Roberts
Diener Precision Pumps
+1 209-365-0405 Ext: 206
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Manuela Chablais
Diener Precision Pumps Ltd
since: 07/2012
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