The Universal Check Valve (also known as Non-Return Valve) is a versatile, self-acting industrial valve designed to prevent reverse flow of media in pipelines. Compliant with international standards (ANSI/ASME, ISO, GB, DIN), it features a simple, robust structure with automatic opening/closing functionality—relying solely on media pressure difference without external actuation. Its “universal” design adapts to diverse working conditions, media types, and pipeline layouts, making it an essential component for ensuring system safety and efficiency in industrial, municipal, and commercial applications.