Problem with the one-way valve in the three-valve group of the unit's high-level oil tank

It is best to send a schematic diagram or a video (panoramic view) of the scene. It seems that the high-level fuel tank does not need a special check valve, right?

If there is a direction requirement, it should only allow downward flow. Normally, the oil pressure in the lubricating oil pipe and the static pressure difference in the high-level oil tank are balanced, and the oil will not flow downward. However, when the oil pump fails and stops the pump, the oil in the high-level oil tank will flow down to protect the bearing bush.

Let’s answer the senior’s questions first: This still depends on the specific configuration of the unit. Some use high-level oil tanks to ensure lubrication during the idle running time of the unit during power outages, and some use emergency oil pumps to ensure this. Answer the host's question: 1. The function of the high-level oil tank, as I mentioned above, means that its actual flow direction is towards the oil line of the lubricating oil pipeline. So if you want to use the valve in your picture, there will also be flow direction instructions on it. 2. Composition, schematic diagram and respective functions of the three valve groups of the high-level fuel tank: https://hcbbsftp.oss-cn-hangzhou.aliyuncs.com/forum/201412/18/114442fwmcdcyrymzk02nw.jpg Three valve group: globe valve: Replenish the high-level fuel tank before operation, and close it after filling. One-way valve: In the event of an emergency, oil is supplied to the equipment from the high-level oil tank through this valve. Restricting orifice plate: When the equipment is running normally, the high-level oil tank is continuously replenished through this orifice plate. When the high-level oil tank is full, it overflows to the ground oil tank and can be observed through the return sight glass. When the compressor is running normally, the stop valve is closed, and the lubricating oil is driven into the bearings through the oil pump for lubrication. On the other hand, the oil is continuously and slowly supplied to the high oil tank through the orifice plate, and continuously overflows to the main oil tank. When the oil pump stops abnormally, the lubricating oil pressure drops, and the lubricating oil in the high-level oil tank falls through the one-way valve due to the high potential difference to prevent dry wear of the rotor. When restarting the compressor later, first open the stop valve to oil the high oil tank, and then start the compressor. The function of the orifice plate is to ensure that the temperature of the lubricating oil in the high-level oil tank is not too low.

If it is installed backwards, oil will be added faster than oil is returned, and oil will leak out of the high-level fuel tank.

I didn't express it clearly. Actually, I just want to ask, is this kind of valve installed horizontally or vertically?

The direction is okay, make sure it flows downward. I would like to ask whether this kind of valve is hammered straight or installed horizontally?

It should be fine, as long as it doesn't affect the working principle of the process. This is a reply without providing a specific process. For reference only.

I still want to know what the actual process of the owner's fuel tank is like. It will be better to look at the pictures. :)

It is recommended to install it vertically, especially for this type of one-way valve. The stress of horizontal installation is relatively worse than that of vertical installation, and the deformation of the spring due to force can easily cause leakage.

The normal installation of the three-valve group is vertical, especially the vertical installation of the one-way valve is more reliable.