Ex nihilo is a Latin phrase meaning out of nothing,â which often appears in conjunction with the concept of creation, as in creatio ex nihilo, meaning creation out of nothing.â Not only do scientists think the Universe was created out of nothing, or that nothing existed before the singularity, but even Creationists, those who believe God created ...
There are two main categories of diaphragm valves: one type seals over a weir (saddle) and the other (sometimes called a full bore or straight-way valve) seals over a seat.
An advantage of this type of check valve is the option to choose the pressure differential that controls the diaphragm for a variety of applications. Wafer Check Valve â These kinds of valves can work with a swing, disc check, split or other mechanism to regulate flow.