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The draining valve is an automatic pressure relief device used to prevent system overpressure. It usually consists of a pressure switch and a draining valve. When a fault occurs in the system because the pressure is too high and exceeds the set value, the pressure switch operates to open the valve and discharge the excessive internal pressure to the outside of the system, thereby avoiding equipment damage or personal injury caused by overpressure. Casualties.
(1) When the flow rate at the outlet of the pump is greater than the flow rate at the inlet, and the pressure at the pump inlet is greater than the pressure at the inlet, at this time, a negative pressure is formed, causing the liquid to be sucked from the pipe and into the pump chamber; at the same time, because the liquid is incompressible properties, so its volume will expand, making the density of the liquid smaller, thus generating upward buoyancy.
(2) When the specific gravity of the liquid is less than that of air, that is, there is a density difference, the gas will escape from the liquid. This phenomenon is called cavitation.
(3) The process of gas escape is the process in which gas is gradually discharged.
(4) During the above process, if the discharge volume of gas is greater than the absorption volume, the remaining gas will accumulate at the end of the pipe, causing a partial vacuum.
(5) If the static sealing performance of the system is good, then this part of the vacuum will be utilized to maintain a certain positive pressure. On the contrary, if the static sealing performance of the system is not good, the remaining vacuum will increase rapidly, causing the entire system to be in a negative pressure state, or even explode.
(6) In a serious situation, when the static sealing performance of the system further deteriorates, even if external air is added to the system, it cannot prevent the negative air from continuing to increase, causing all the media in the pipeline to flow into the sewer or be discharged. .
According to different modes of action, unloading valves can be divided into three types: manual, electric and pneumatic. According to different structural forms, it can be divided into slide valve type, cock type and balloon type. Depending on the installation location, it can be divided into two types: horizontal installation and vertical installation.
Please feel free to contactus Parts Sea engineers or sales for help if you have no parts No.
tse@partssea.com | sales@partssea.com
The draining valve is an automatic pressure relief device used to prevent system overpressure. It usually consists of a pressure switch and a draining valve. When a fault occurs in the system because the pressure is too high and exceeds the set value, the pressure switch operates to open the valve and discharge the excessive internal pressure to the outside of the system, thereby avoiding equipment damage or personal injury caused by overpressure. Casualties.
(1) When the flow rate at the outlet of the pump is greater than the flow rate at the inlet, and the pressure at the pump inlet is greater than the pressure at the inlet, at this time, a negative pressure is formed, causing the liquid to be sucked from the pipe and into the pump chamber; at the same time, because the liquid is incompressible properties, so its volume will expand, making the density of the liquid smaller, thus generating upward buoyancy.
(2) When the specific gravity of the liquid is less than that of air, that is, there is a density difference, the gas will escape from the liquid. This phenomenon is called cavitation.
(3) The process of gas escape is the process in which gas is gradually discharged.
(4) During the above process, if the discharge volume of gas is greater than the absorption volume, the remaining gas will accumulate at the end of the pipe, causing a partial vacuum.
(5) If the static sealing performance of the system is good, then this part of the vacuum will be utilized to maintain a certain positive pressure. On the contrary, if the static sealing performance of the system is not good, the remaining vacuum will increase rapidly, causing the entire system to be in a negative pressure state, or even explode.
(6) In a serious situation, when the static sealing performance of the system further deteriorates, even if external air is added to the system, it cannot prevent the negative air from continuing to increase, causing all the media in the pipeline to flow into the sewer or be discharged. .
According to different modes of action, unloading valves can be divided into three types: manual, electric and pneumatic. According to different structural forms, it can be divided into slide valve type, cock type and balloon type. Depending on the installation location, it can be divided into two types: horizontal installation and vertical installation.