When water level rises to top height, water level in small water tank slowly declines as users consume water from it. When water level declines to a preset level, this valve will open to fill water into the small tank.

It helps to prevent whirlpool and avoids mechanical problems from too frequent on&off movement if valve opens whenever level declines just a little.

As a medium-sized professional valve manufacturer, our company is dedicated to producing all kinds of water supply and drainage valves, mainly including check valves, water control valves, pump control valves, flow and pressure regulating valves, strainers, and air release valves. We manage all aspects of product research, design, production, sales, installation, and service.

Besides standard products, we also design and manufacture non-standard valves according to drawings or samples from users. Our products are distributed globally, serving industries such as chemical, oil production, paper production, construction, fire protection, electric power, and water engineering projects. After nearly 30 years of development, we utilize advanced processing and inspection equipment to ensure innovative design and outstanding workmanship.

We operate under a strict quality control system and a scientific enterprise management system, achieving high levels of product development and testing. Our business philosophy is "All for users, All from innovation," continuously improving competitiveness to provide reliable solutions to our global clients.