Ventilator Relief Valve Free 3D print model

3D printed relief valve for an open sourced ventilator, using an off the shelf squash ball as a seal. To set the relief pressure there are several versions of the cap here that have different compression of the squash ball, print and test against your pressure needs. Alternately the ball can be shimmed to increase the relief pressure. 3x M4 bolts for the cap, tap the body for the threads.