Our mine door wings open in opposite directions. This unique, balanced design feature allows our mine doors to withstand many inches of water gauge pressure. The same air pressure that assists the door in opening also assists it in closing. Consequently, air pressure is equalized. Ramp slope effects are cancelled as one door wing operating downhill aids the other wing uphill. Due to the equal force principle, our mine doors can be installed in almost any slope application to assure maximum lifetime value. Our mine doors are reusable and can be moved from one location to another.
