Symbol 2728 from ISO 7000 - Title/Meaning: One-way valve Function/description: On medical devices: to indicate a product with check valve in the fluid path (one way only). For the user it is important to know that the administration is only possible one way. No possibiltiy in aspiration or withdrawal of solution.
pay attention to orientation of symbolAdditional information: 
For the user it is important to know that the administration is only possible one way, and there is no possibility of aspiration or withdrawal of the solution.
Own work using: iso.org/obp/graphics/grs/fd6d447e-d6c1-4c75-a1ab-edd65fb16f23 200.png
Vectorization:  Mrmw