This is my design of a 3D-printed check valve for inflating balloons. It is a small design aimed at simplifying manual balloon inflation. This model consists of two parts and is designed for print-in-place manufacturing, requiring minimal (no) assembly. While support structures are necessary, the valve prints quickly and efficiently.

There is also an improved version of this model available:

[https://makerworld.com/de/models/1368825-balloon-inflator-v2-fast-print-without-support#profileId-1415004](https://makerworld.com/de/models/1368825-balloon-inflator-v2-fast-print-without-support#profileId-1415004)

Key features:
Material tested: PLA.
Post-processing option: If print quality varies, the sealing might not be perfect. The internal surfaces can be smoothed using a flathead screwdriver by gently rotating the inner part.

Functionality: Ensures a tight seal for reliable use.

If you would like to have some additional fun, check out this model:

[https://makerworld.com/de/models/1067163#profileId-1056392](https://makerworld.com/de/models/1067163#profileId-1056392)

Community:

I appreciate the community aspect of 3D printing and am pleased to share my models for everyone to use.

If you decide to print the inflator, I invite you to share pictures of your finished models and balloons :). Seeing how others utilize these designs can be fun for everyone. I also encourage you to provide feedback on the included print profile. Your experiences and suggestions can help improve the designs and assist others in achieving better results.

Printing Instructions:
 

1. Print orientation: Valve mouthpiece should face up
2. Support structures: Required on the bottom side
3. Bottom side: Identified as the side with the slotted screw

This orientation ensures the best print quality and structural integrity of the valve.