Doug Robinson

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About Doug Robinson

1. Diener Precision Pumps designs and manufactures precision-engineered metering pumps and gear pumps for OEM fluid handling systems. 2. Diener Precision Pumps is a leader in the field of engineering, development, and production of micro pumps for precise fluid handling.

Food and Beverage Precision Pumps

Doug Robinson17 Oct, 2021Technology

The Diener Precision line of ?flow-thru? gear pumps are ideal for food and beverage transfer and dispensing. They allow for very quick clean-in-place flexibility and are certified by the National Sanitary Foundation (NSF/ANSI 169). Special pump gear designs in milk-frothing applications (commercial coffee machines) generate high vortices at very high pressures, resulting in a whipping effect that creates a very light foam texture. The special bearing design is sized to maximize life by supporting the gears in two-phase air/milk frothing. The repeatable superior foam quality is the ultimate coffee experience. The Optima Series precision gear pumps supply up to 2.5 liters per minute with its durable 24V motor, generating the perfect foam in commercial coffeemakers.

Continuous Inkjet Printer Pumps

Doug Robinson12 Oct, 2021Technology

Diener Precision Pumps the preferred choice in continuous inkjet printers: pulse-free pressure delivery; able to pump all types of dye and solvent-based inks and precision electronic control with magnetically-coupled drivers. Pulse-free pressure delivery, able to pump all types of dye and solvent-based inks, magnetically-coupled drives, precision performance electronic control; these are the features that make Diener Precision Pumps the preferred choice in continuous inkjet printers.

Hemodialysis and Peritoneal Dialysis Pumps

Doug Robinson12 Oct, 2021Technology

Diener Precision Pumps is the World leader in the design and manufacturing of Hemodialysis and Peritoneal Dialysis precision metering and gear pumps. Repeatable pump-to-pump performance and micro-dosing is achieved via extremely small manufacturing tolerances, making for a better dialysis treatment and an enhanced patient experience. Diener?s gear pumps are fitted with helical gears, minimizing bedside noise and vibration. Gear pumps used in on-board water filtration systems can handle hard-water deposits and still deliver high pressure output over the life of the dialysis monitor.

Precision Gear Pumps

Doug Robinson11 Oct, 2021Technology

Simple ingenious design with Swiss precision engineering makes DPP gear pumps the most accurate, long-life continuous flow pumps available on the market. The DPP gear pump series ranges from cost-optimized Silencers, utilized at high-temperature ranges, to the robust Extreme Series that also works with challenging fluids such as pigmented ink at high pressure levels. Each gear pump is engineered to deliver the same flow rate from pump-to-pump. Each pump is made from materials that are resistant to a wide range of aggressive chemicals. Our clients can be assured their pumps will operate reliably and precisely in even the most severe environments. All pumps can be cleaned quickly, easily and thoroughly without having to be removed, thus ensuring increased productivity and reduced costs.

Precision Micro-Dosing and Metering Pumps

Doug Robinson11 Oct, 2021Technology

Simple ingenious design with precision Swiss engineering ensures the DPP micro-dosing and metering precision pumps are the most reliable and accurate in their class. The Precision Series pumps are constructed to deliver the same flow quantities with consistency and reliability. Each pump is made from materials that are resistant to a wide range of aggressive chemicals. Our clients can be assured their pumps will operate reliably and precisely in even the most severe environments. All pumps can be cleaned quickly, easily and thoroughly without having to be removed, thus ensuring increased productivity and reduced costs.

Effects of Viscosity on Positive Displacement Pumps

Doug Robinson01 Aug, 2021Business

Positive displacement pumps move fixed volumes of fluid mechanically through a system. Therefore, one might conclude that fluid viscosity has little effect on the output of the pump. This, however, is a misconception and can lead to severe issues in a hydraulic system unless the effects of viscosity are well understood, and the system designer properly communicates the information to the pump engineers.

Magnetically Coupled Gear Pumps

Doug Robinson31 Jul, 2021Business

Traditional external gear pumps utilize a motor shaft which is directly coupled to a driving gear within the pump. To make this coupling, the shaft must pass through a sliding seal. The typical life-limiting component in a direct drive pump is the seal. Regardless of seal type and quality, the seal will wear and eventually leak. Magnetically coupled gear pumps avoid the life-limiting seal by using a magnetic coupling to transfer torque into the pump. This establishes a hermetic seal while still coupling the motor to the driving gear.

Fine Abrasive Fluids in Positive Displacement Pumps

Doug Robinson30 Jul, 2021Business

An abrasive fluid is one that causes increased wear to the fluidic system by eroding surfaces through physical interaction. Erosion can occur from simple flow across a surface or by the abrasive particles interfering with internal component interactions within a pump. The types of particles can be large contaminants such as those experienced in wastewater applications, or they can be finely integrated pigments in the liquid which are intentional. These include paint pigments, ink pigments, suspended carbon, metal pigments and chocolate (when suspended in milk, syrup, etc.). This article will deal specifically with suspended abrasive particles less than 1mm in size.

Pump Cavitation and how to avoid it | DPP Blog DPP

Doug Robinson30 Jul, 2021Home & Garden

All pumps operate by creating a low pressure at the inlet and allowing atmospheric (or system) pressure to push fluid into the pump. The process makes all pumps susceptible to a phenomenon called cavitation. Cavitation is the formation of vapor cavities (bubbles) inside of a liquid when the local pressure is decreased rapidly below the vapor pressure of the liquid. This forms a vapor bubble inside the liquid which typically lasts for a short time before collapsing back into a liquid. The collapse is violent, producing a loud popping noise and often damaging nearby surfaces. Even strong metals will be pitted when subjected to the strong, localized jet resulting from the bubble implosion.