Possible Faults Of Fluorine-lined Check Valves And Their Elimination Methods

Lined Check Valve is mainly installed in pipelines or devices to prevent the backflow of media. Because its lining is fluoroplastic, it has strong corrosion resistance and is often used in corrosive media. The opening and closing of the fluorine-lined check valve is achieved by removing the pressure generated by the flow of the medium itself. According to the different movement modes of the valve stem, the flange-type fluorine-lined check valve is divided into flange-connected lifting fluorine-lined check valve and flange-connected swing fluorine-lined check valve. Below, we briefly introduce the possible faults that the fluorine-lined check valve may encounter during use, analyze the causes and propose solutions.
Possible fault 1: The valve disc cannot be opened or closed
Cause: 1. The rocker and the pin shaft are too tight or there is a foreign object stuck inside; 2. There is a foreign object stuck in the valve.
Solution: 1. Check the fit; 2. Eliminate foreign objects.
Possible fault 2: Leakage occurs at the connection between the valve body and the valve cover of the check valve
Cause: 1. The connecting bolts are not tightened evenly; 2. The flange sealing surface is damaged; 3. The gasket is broken or failed.
Solution: 1. Re-tighten the bolts evenly; 2. Repair the damaged sealing surface; 3. Replace the sealing gasket.
Possible fault three: The valve makes loud noise and vibrates
Cause: 1. The fluorine-lined check valve is located near the pump; 2. The pressure of the medium flowing in the pipe is unstable.
Solution: 1. Reinstall the appropriate position; 2. Eliminate pressure fluctuations.