{"id":321,"count":2,"description":"

A float valve is an automatic valve that opens and closes the water flow based on the water level in a storage tank, without requiring human intervention. When the water level drops below the preset level, the valve opens to supply water into the tank. When the water rises to the specified level, the valve automatically closes to prevent overflow.<\/p>\r\n

Types of Float Valves<\/h2>\r\n
Currently, there are three main types of float valves, each with a different operating mechanism: mechanical float valves, hydraulic float valves, and electric float valves.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Type<\/strong><\/td>\r\n Features<\/strong><\/td>\r\n Application Scale<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n
Mechanical Float Valve<\/strong><\/td>\r\n \r\n
\u2022 Operates based on the mechanical force of a float ball moving on the water surface to open and close the valve.<\/p>\r\n
\u2022 Fully automatic operation without requiring electricity.<\/p>\r\n
\u2022 Commonly made of cast iron, brass, or stainless steel.<\/p>\r\n<\/td>\r\n
\r\n
\u2022 Domestic storage tanks<\/p>\r\n
\u2022 Household water systems<\/p>\r\n
\u2022 Small-scale fire protection systems<\/p>\r\n<\/td>\r\n<\/tr>\r\n
Hydraulic Float Valve<\/strong><\/td>\r\n \r\n
\u2022 Does not require electricity and uses the pressure of the water flow itself to lift the valve disc.<\/p>\r\n
\u2022 Capable of handling high flow rates and water pressure. A minimum pressure of approximately 0.5 bar - 1 bar is required for operation.<\/p>\r\n
\u2022 Uses a hydraulic diaphragm mechanism for gradual opening and closing, helping reduce water hammer.<\/p>\r\n<\/td>\r\n
\r\n
\u2022 Underground water storage tanks and rooftop water tanks of high-rise buildings and apartment complexes<\/p>\r\n
\u2022 Clean water distribution systems of municipal water supply plants<\/p>\r\n
\u2022 Water storage tanks serving fire protection systems, with sizes ranging from DN50 to DN300<\/p>\r\n<\/td>\r\n<\/tr>\r\n
Electric Float Valve<\/strong><\/td>\r\n \r\n
\u2022 Equipped with a sensor at the float to control the starting and stopping of pumps or solenoid valves.<\/p>\r\n
\u2022 Uses a 220V or 380V control power supply.<\/p>\r\n
\u2022 Commonly made of cast iron or stainless steel.<\/p>\r\n<\/td>\r\n
\r\n
Typically used in large-scale projects that require high precision and automation:<\/p>\r\n
\u2022 Water supply systems in high-rise buildings, residential areas, and industrial parks.<\/p>\r\n
\u2022 Large-scale fire protection systems<\/p>\r\n
\u2022 Clean water and wastewater treatment plants, etc.<\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
General Structure of a Float Valve<\/h2>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Component<\/strong><\/td>\r\n Function<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n
Valve Body<\/td>\r\n Contains the internal components and connects to the water supply pipeline<\/td>\r\n<\/tr>\r\n
Valve Seat<\/td>\r\n The contact surface with the valve disc when closed, determining the valve's sealing performance<\/td>\r\n<\/tr>\r\n
Float Ball<\/td>\r\n Moves up and down with the water level and generates the opening or closing signal<\/td>\r\n<\/tr>\r\n
Valve Disc<\/td>\r\n Closes or opens the water supply passage<\/td>\r\n<\/tr>\r\n
Connecting Rod (Lever Arm) - Mechanical Float Valve Only<\/td>\r\n Directly transmits movement from the float to the valve disc<\/td>\r\n<\/tr>\r\n
Control Float Valve (Pilot Valve) - Hydraulic Float Valve Only<\/td>\r\n A small float valve installed on the outside wall of the tank that sends a pressure signal to the main valve instead of using a direct mechanical connection<\/td>\r\n<\/tr>\r\n
Signal Tube - Hydraulic Float Valve Only<\/td>\r\n Transmits the pressure signal from the control float valve to the main valve<\/td>\r\n<\/tr>\r\n
Electrical Controller - Electric Float Valve Only<\/td>\r\n Receives signals from the float sensor and switches the power supply to the pump or electric valve on and off<\/td>\r\n<\/tr>\r\n
Sealing Gasket<\/td>\r\n Prevents leakage at the contact point between the valve disc and valve seat<\/td>\r\n<\/tr>\r\n
Connection<\/td>\r\n Connects the valve to the pipeline; threaded connections are used for small sizes, while flanged connections are used for larger sizes<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n
Operating Principle of a Float Valve<\/h2>\r\n
A float valve operates by sensing changes in the water level through the float ball. This generates a mechanical force or control signal that opens or closes the valve disc. When the water level is below the preset level, the float is in a low position and the valve disc opens, allowing water to continue flowing into the tank. As the water level rises, the float rises accordingly. When the water reaches the specified level, the float produces an opposing force that causes the valve disc to gradually close until it is completely sealed, preventing further water from entering the tank. When the water level drops again, the float moves downward, the valve disc opens again, and the cycle repeats.<\/p>\r\n
The main difference between the operating principles of the three types of float valves lies in how the signal is transmitted from the float to the valve disc:<\/p>\r\n
\r\n\t
Mechanical float valves transmit the signal directly through a mechanical connecting rod.<\/li>\r\n\t
Hydraulic float valves use a separate control float valve (pilot valve) to send a pressure signal to the main valve.<\/li>\r\n\t
Electric float valves convert the water level change into an electrical signal to control the pump or electric valve.<\/li>\r\n<\/ul>\r\n
Float Valve Installation Notes<\/h2>\r\n
\r\n\t
The float ball must have sufficient space to move freely inside the tank and should not come into contact with the tank wall or other pipelines. Otherwise, the valve may open or close incorrectly.<\/li>\r\n\t
For electric float valves, the signal cable should be routed through a protective conduit to prevent short circuits or cable damage caused by prolonged exposure to water.<\/li>\r\n\t
For hydraulic float valves installed in fire protection water tanks, the actual pipeline pressure should be checked before installation. Insufficient pressure may prevent the valve from closing completely, resulting in continuous water loss.<\/li>\r\n\t
For projects with separate rooftop and underground water tanks, many contractors install the same type of float valve in both locations. However, rooftop tanks are generally more suitable for electric float valves to automatically control the pump, while large underground tanks should use hydraulic float valves to avoid running electrical cables to a damp installation environment.<\/li>\r\n<\/ul>\r\n
As a professional supplier of industrial float valves with many years of experience, An Phu Thanh always provides solutions based on the specific installation location rather than simply selling valves according to the required size. An Phu Thanh keeps a wide range of float valves in stock in different sizes and materials, meeting the needs of projects requiring urgent installation without having to wait for special orders.<\/p>\r\n
If you are unsure which type of float valve to choose, please contact An Phu Thanh via Hotline or Zalo OA at 0946 729 913<\/a> for immediate assistance. Our team of consultants is always pleased to serve you.<\/p>","link":"https:\/\/anphuthanhvalve.com\/en\/float-valve\/","name":"Float Valve","slug":"float-valve","taxonomy":"product_cat","parent":301,"meta":[],"menu_order":0,"acf":[],"_links":{"self":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product_cat\/321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product_cat\/301"}],"wp:post_type":[{"href":"https:\/\/anphuthanhvalve.com\/en\/wp-json\/wp\/v2\/product?product_cat=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}