Wear of the wing valve plate in the catalytic device

Send a video so I can give it a look: lol

The main reason is wear of the valve plate due to poor sealing caused by coking or gum buildup. The wing valve must be replaced every maintenance cycle.

It could be a problem with the material level or the installation angle

Wear of the flap valve usually occurs on the tongue plate and seat surface, and there are several possible causes: 1. Material issues – the use of low-quality flap valves may lead to accelerated wear of the catalyst； 2. The formation of coke leads to the accumulation of coke in the material legs, which then gets stuck at the valve plate and prevents the valve plate from closing properly; this results in wear due to continuous catalyst flow ； 3. Excessive catalyst circulation causes wear on the flap valve. Personally, I think it’s best to have a spare set of flap valves on hand; they can be replaced during maintenance. Whether they’re in good condition or not, it’s still fine as long as the system keeps operating normally. However, due to the variations in operating conditions that occur when the system is started up or shut down, it’s possible that the flap valves may stop working properly. If the solid content of the slurry increases, it could be due to severe damage to the catalyst, an excessive amount of fine powder, or problems with the single screw; check the pressure drop across the single screw

It’s a material issue; the material we use currently is 15CRMO, while some devices use stainless steel. But both of these materials wear out over time

Then calculate your fuel-to-oil ratio as well as the catalyst particle size analysis, or the extent of coking. We have encountered similar situations in the past; it was necessary to replace the wing valves every time during major overhauls, otherwise the losses would be too great