1. Specs for DAC mixer.pdf
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- Attached to
- Dual Asymmetric Centrifuge (DAC) Mixer
- Solicitation number
- 12305B24Q0181
About this file
This document is a Request for Quotation (RFQ) for a Dual Asymmetric Centrifuge (DAC) Mixer for the United States Department of Agriculture (USDA), NEA Dairy and Functional Foods Research Unit in Wyndmoor, PA.
The key details are: The USDA has a requirement for a DAC mixer to assist in the mixing and formulation of high-solids protein-based solutions for edible films and structures. The minimum specifications for the mixer include a capacity of at least 500g, a variable centrifugal speed of up to 1500rpm, an internal strobe light, variable counter-rotation, temperature control, and the ability to apply vacuum. The order is for 1 unit, with a performance period of 30-60 days. The RFQ is a full and open competition under NAICS code 334516 (Analytical Laboratory Instrument Manufacturing). Quotes are due via email by the date/time on the SAM.gov posting and will be evaluated on a Lowest Priced Technically Acceptable basis.
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Specifications: DAC Mixer
Objective: The Dairy and Functional Foods Research (DFFR): Wyndmoor, PA, has a requirement for a Dual Asymmetric Centrifuge (DAC) Mixer.
Background: The DFFR project entails designing formulations for edible films and structures from dairy components, such as caseinates, whey, milk protein concentrate, whey protein isolate, etc. This involves mixing of proteinaceous powders in aqueous solvents typically in concentrations of greater than 12%, when physiological concentrations of such proteins in milk are below 4%. The powders thus take considerable time to fully dissolve while mixing via stirring. The process is further complicated with the tendency of these protein powders to form clumps that are very hard to stir into solution if care is not taken while mixing. Heating may be required so that constant supervision is needed throughout the stirring process. Moreover, formulations with protein concentrations high enough to maintain shape also tend to have large viscosities, making them hard to stir. All of these complications would be solved by use of a DAC mixer. Such a mixer operates by centrifuging a sample while spinning the sample counter to the centrifugation motion. Our formulations are easily, quickly, and consistently mixed with a DAC mixer, and using a DAC mixer would allow for the creation of formulations with even higher solids contents with enhanced properties.
The minimum specifications for a DAC mixer include: (Brand Name of Equal to: Hauschild SpeedMixer:
SMART DAC 600.4 VAC-P LR)
• A capacity for mixing at least 500 g of material at once (or greater)
• Variable centrifugal speed of at least up to 1500 rpm (or greater)
• Internal strobe light synchronized to sample during the spin that allows for visualization of the sample during mixing to facilitate method development.
• Variable counter-rotation.
• Temperature control including chilled air cooling.
• Ability to monitor temperature of the sample during mixing.
• Capability of applying vacuum to mixing chamber and sample to remove air bubbles in sample.
• Holders and containers designed for sample sizes to cover a range of at least 50 to 300 g.
• Machine Stand
Delivery Location:
US Dept of Agriculture 600 E. Mermaid Ln Wyndmoor, PA. 19038
• Point of Contact: (Provided at time of award)
Period of Performance:
*30-60 Days (ARO)
-End-
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