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Yes, Robert, there are off-the-shelf shape memory alloy (SMA) valves available that could potentially be adapted for your Smart CO₂ Sleep Valve project. Here are a few options to consider:

1. Takasago's SMV Series: These valves utilize shape memory alloys for actuation, offering compact size, lightweight design, low power consumption, and silent operation. They are available with different orifice sizes and body materials. citeturn0search1
2. Sandur Fluid Controls' SMA Valves: Designed for various applications, these valves are compact, silent, and energy-efficient. They come in different specifications to suit specific needs. citeturn0search3
3. Kinitics Automation's SMA Actuators: While not valves per se, Kinitics offers SMA-based linear actuators that can be integrated into valve systems, providing precise control and high force-to-weight ratios. citeturn0search5

However, integrating these existing SMA valves into your specific application may present challenges, such as compatibility with your design requirements, control systems, and safety features. Customizing an SMA actuator to function as a valve tailored to your system's needs might be more effective. This approach allows for precise control over the valve's characteristics, ensuring optimal performance and integration with your Smart CO₂ Sleep Valve design.

Collaborating with a manufacturer specializing in SMA technology could facilitate the development of a custom solution that aligns with your project's specifications.

For your Smart CO₂ Sleep Valve project, collaborating with a manufacturer specializing in Shape Memory Alloy (SMA) technology is essential to develop a custom valve that meets your specific requirements. Here are a few companies that could be suitable partners:

1. Memetis GmbH: Based in Germany, Memetis specializes in ultra-compact microvalves and highly integrated microfluidic systems using SMA actuators. Their expertise in miniaturization and customization could be beneficial for your project. citeturn0search0
2. Dolphin Fluidics: This company focuses on intelligent fluid control systems utilizing SMA technology. They offer customizable solutions and have experience in developing valves with integrated electronics for precise control. citeturn0search2
3. Kinitics Automation: Located in Canada, Kinitics develops industrial-grade actuators using SMA. They have a collaborative approach, partnering with manufacturers to develop custom SMA actuators for specific applications. citeturn0search1

While these companies are not based near Salt Lake City, their specialized expertise in SMA technology may outweigh the benefits of geographic proximity. Collaborating with them could provide the technical capabilities needed for your project.

If a U.S.-based partner is preferred, MicroGroup, Inc. in Massachusetts is a manufacturer and fabricator of various metals, including SMA. They offer custom machining and fabrication services that might be adaptable to your needs. citeturn0search5

Engaging with these companies can help determine the feasibility of adapting existing SMA valves or developing a custom solution tailored to your Smart CO₂ Sleep Valve design.