I am trying to determine in which standard the p/T ratings of PN designated valves is given. Or in other words, when a valve is stated to be PN16 Rated - to which standard is is rated as such?

We moved in to our new home 20 months ago. We have a sump pump in our basement in an 18” x 24” polyethylene pit.

I would like to know that for all the AUTO START centrifugal pumps ( Open valve start up) , whether it should be designed for End of Curve operation?

Does an LPG (Butanes) Pressurized Storage Sphere require a vacuum breaker? Our existing tanks were designed with a vacuum pressure (actually a duo-check valve) that is set to open at 1" H2O and has a

We have a gas turbine engine (420 shp turboshaft engine mostly used in helicopters). We want to use it in an experimental aircraft. The engine would drive 2 counter rotating constant speed propellers

I'm not too familiar with ARV's however I know the basic principle behind how ARV's work. However, what exactly are the "Air and Vacuum Flow rate" and the "Automatic Air discharge"?

I'm interested in learning about gears mechanisms that translate linear motion to rotational motion. Specifically, I need to translate the motion of straight-line linear motion (essentially straight

We've all seen the various ad's in the past of an engine running with out oil. I have also read some stories from aviators that had engines run out of oil, and the engine was saved from damage.