Why is the check valve at the outlet of the main fan lubrication oil pump leaking?
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Has a hole been formed in the check valve at the outlet of the extreme pressure pump in the lubricating oil station of the main fan in my company’s catalytic cracking unit? The standby pump rotates in reverse under normal conditions; why is that? ? ?
“What exactly is the situation with a “punctured export check valve”? Let me explain clearly.
A small hole was made in the check valve to allow the backup pump to run in reverse, but I don’t know why
On the check valve plate? The pumps at gas stations are usually plunger pumps; can they be run in reverse?
Reverse? ! ! ! What kind of situation is this? Will the lubrication system be affected?
A 2–3 mm hole was drilled in the valve plate of the check valve at the oil pump outlet of one of the catalytic units in our facility, allowing the oil discharged by the main oil pump to flow back into the auxiliary pump through the check valve at the auxiliary pump’s outlet. This ensures that the auxiliary pump is always filled with oil under the same conditions as those in the main pump, keeping it in a ready state and thus ensuring a smooth and rapid pump switching process. As I recall, this type of drilling design was originally part of Siemens’ lubrication system structure, and was later adopted by some domestic companies such as SHENGU.
During normal operation, does your backup pump run in reverse?
As far as I know, the engines here have never experienced any reverse rotation; the description provided by the original poster has left me a bit puzzled. I look forward to further details from the poster regarding the actual situation and observations on site.
Does the standby pump stay running due to the auto-start interlock?
Yes, I don’t know why, but the same thing is true for the lubricating oil station of the hydrogenation feed pump as well