Stainless steel check valves are specifically designed to prevent liquid or gas backflow in pipelines. There is a movable valve disc inside that pushes open to make way for normal fluid flow. If backflow is desired, the valve disc will immediately close and block it.
The daily cleaning of stainless steel check valves is to use neutral cleaning agents to wipe away dirt, and when the dirt is deep, you can try soaking it in an acidic solution to remove it. First, disassemble the valve disc, and then soak the valve body in a 5% white vinegar solution or citric acid solution (40 ℃ warm water ratio) for 30 minutes. If there is stubborn scale, use a cotton swab dipped in stainless steel cleaning paste to polish it carefully.
For rust on the valve stem or spring, wet apply a mixture of white vinegar and salt for 15 minutes and lightly brush with a nylon brush. If there are stubborn rust spots, apply WD-40 rust inhibitor and let it stand for 20 minutes before wiping.
Do not use hard tools such as steel wire balls to wipe valves! Chlorine containing cleaning agents cannot be used as they can accelerate valve corrosion! After cleaning, promptly dry the valve chamber with compressed air or absorb moisture with ultra-fine fiber cloth.