2006-12-25 15:49:16 · 4 answers · asked by uriel 1 in Science & Mathematics ➔ Engineering
In addition to much more complex internals...
Visually determining the amount a valve is opened or closed may be limited. Compared to a rising stem that can easily be see from a distance a non-rising stem (on larger valves) is fitted with a moving indicator on the valve stem that lines up with a scale mounted to the bonnet. Due to its smaller size and location on the valve it may not be visible fom all directions and might not be easily viewed from a distance.
2006-12-25 16:45:17 · answer #1 · answered by MarkG 7 · 0⤊ 0⤋
so non rising stem valves are usually used on only clean liquids long of stem is the same
2016-05-23 06:59:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
A valve stem is the port on a wheel that allows the tire to be pressurized. They are typically spring-loaded devices that admit air when the external pressure is greater than the internal tire pressure to allow filling.
2006-12-26 18:16:51 · answer #3 · answered by ifureadthisur2close 2 · 0⤊ 0⤋
They are more complicated inside - since the valve part has to move up and down while the handle does not - and thus more prone to problems and more costly to make.
2006-12-25 15:56:41 · answer #4 · answered by Mike1942f 7 · 0⤊ 0⤋