Why does the pressure gauge at the pump outlet turn only 1-2 times?
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Why is the pressure gauge on the pump outlet set to rotate only 1-2 turns? Turning it fully open shouldn’t cause any problem, right?
In fact, there are no specific requirements regarding the degree of opening; a smaller opening is used to prevent leaks in the pressure gauge, especially in hot oil pumps – closing it immediately stops such leaks. Generally, an opening of 1/3 is sufficient, though it’s also possible to use full opening
Some pumps generate very high pressure immediately upon startup, which could damage the pressure gauge; therefore, the outlet valve is opened slightly
To prevent sudden excessive pressure and protect the pressure gauge, some pumps are equipped with a buffer bend before the pressure gauge is installed at their outlet
As long as the pressure gauge is connected to the process pipeline, it will display the correct pressure. The low opening degree is intended for safety reasons, so leaks can be stopped immediately!
The pressure tap valve of the pressure gauge at the pump outlet is a gate valve, and its opening degree has no impact on pressure measurement. It’s fine to leave it fully open, or to turn it two notches. The heat pump is always in preheating mode, and turning it on has no effect on the pressure gauge.
Seismic protection, protective measures for pressure gauges
It is also to take into account the issue of pressure fluctuations
Preventing accidents from escalating due to pressure gauge leaks is difficult to handle. Our company experienced a severe fire in 2005 caused by a crack in the feed pressure gauge of a coking furnace – it was a painful lesson! !