STAINLESS STEEL 304 Air Vent Valve: Made of high-quality stainless steel 304. Resistant to rust and high temperatures. BLEED EXCESS AIR: Automatically releases air while preventing water discharge. WELL-SEALED AIR RELEASE VALVE: Constructed with high-precision components. Designed for easy disassembly, maintenance, and cleaning. Sealing O-ring at the joint ensures leak-free performance. SPECIAL STRUCTURE DESIGN: Features a floating system with a spring mechanism that automatically closes the valve before water reaches the top, allowing only air to escape. Effectively removes trapped air from the system over time. WIDE APPLICATIONS: Suitable for use in water heating systems, HVAC systems, radiators, boilers, solar water heaters, and other applications requiring air and water separation.