Other design requirements include taking into account pressure head operation, the flow rate, whether the valve operates above or below water, and the regulation of precision and cost.
22.
Scientists frequently use columns of water ( or mercury ) to measure pressure ( manometric pressure measurement ), since for a given fluid, pressure head is proportional to pressure.
23.
The main issue with accuracy is that if the bulb and the stem are at different levels, there is a change in reading due to the change in pressure head.
24.
In a typical design, fluid enters the narrow top end of the filter falling onto a chamber where pressure head is built to force the fluid across woven filter media.
25.
They proceeded to launch It's On U, a lobbying campaign to pressure heads of state and UN Security Council members to refer the Yazdi genocide to the ICC.
26.
They provided a steelyard balance that allowed seasonal adjustment in the pressure head of the compensating tank and could then control the rate of flow for different lengths of day and night.
27.
In a confined aquifer, the saturated thickness is determined by the height of the aquifer, " H ", and the pressure head is non-zero everywhere.
28.
Because the Green Swamp region is elevated above outlying areas and the underground aquifer rises very close to the land surface, the region functions as the pressure head for the aquifer.
29.
To address the problem of slowed timekeeping in the pressure head of the inflow water clock, Zhang was the first in China to install an additional tank between the reservoir and inflow vessel.
30.
Zhang Heng was the first in China to add an extra compensating tank between the reservoir and the inflow vessel, which solved the problem of the falling pressure head in the reservoir tank.
