06.11.15
According to officials from Switzerland-based Diener Precision Pumps, 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, the company claims. Valve-less piston pumps that combine the benefits of syringe pumps with lower cost and higher performance, could be the solution.
The company is planning a live demonstration of valve-less piston pumps at the upcoming annual meeting of the American Association for Clinical Chemistry in Atlanta, Ga., in July.
Historically, syringe pumps have 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. They are, however, costly and bulky and require a long refill time, Diener officials say.
The company has developed an alternative solution for medical devices.
“Ceramic piston pumps, which support both rotary and linear movement and use longer displacements and higher speeds, meet all necessary requirements,” said John Bishop, director of sales and marketing at Diener Precision Pumps. “The pump can fill quickly and still dispense with high accuracy, following a sinusoidal dispense/fill curve.”
By carefully designing the pump’s geometry, life-limiting check valves are eliminated. This increases pump life and reduces cost, the company claims. Accuracy is maintained using very tight operating clearances, typically in the 2-3 micrometer range. In addition, ceramic is extremely strong and can only be treated with diamonds. Ceramic pumps, therefore, can 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, polytetrafluoroethylene, 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.
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, according to the company. 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.
Diener Precision Pumps is a privately owned engineering company, run by engineers for engineers designs and manufactures piston pumps and gear pumps for OEM fluid handling systems worldwide. The precision pumps are developed at Diener Precision Pumps’ center of innovation in Lodi, Calif., and are produced at the company’s headquarters in Embrach, Switzerland.
The company is planning a live demonstration of valve-less piston pumps at the upcoming annual meeting of the American Association for Clinical Chemistry in Atlanta, Ga., in July.
Historically, syringe pumps have 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. They are, however, costly and bulky and require a long refill time, Diener officials say.
The company has developed an alternative solution for medical devices.
“Ceramic piston pumps, which support both rotary and linear movement and use longer displacements and higher speeds, meet all necessary requirements,” said John Bishop, director of sales and marketing at Diener Precision Pumps. “The pump can fill quickly and still dispense with high accuracy, following a sinusoidal dispense/fill curve.”
By carefully designing the pump’s geometry, life-limiting check valves are eliminated. This increases pump life and reduces cost, the company claims. Accuracy is maintained using very tight operating clearances, typically in the 2-3 micrometer range. In addition, ceramic is extremely strong and can only be treated with diamonds. Ceramic pumps, therefore, can 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, polytetrafluoroethylene, 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.
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, according to the company. 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.
Diener Precision Pumps is a privately owned engineering company, run by engineers for engineers designs and manufactures piston pumps and gear pumps for OEM fluid handling systems worldwide. The precision pumps are developed at Diener Precision Pumps’ center of innovation in Lodi, Calif., and are produced at the company’s headquarters in Embrach, Switzerland.