A steel flap gate is a one-way valve installed at the end of a pipeline, primarily used to prevent backflow of external water. It operates automatically through the pressure difference of the medium, requiring no manual intervention. ?
Structure and Composition
A steel flap gate consists of a gate plate, gate hinge, gate seat, sealing components (such as rubber sealing rings), and hinges. Some models include a valve body and valve cover. The sealing rings are typically made of rubber, while the hinges are often stainless steel to enhance corrosion resistance. ?
Working Principle
When the internal water pressure of the pipeline exceeds the external pressure, the gate leaf opens automatically; conversely, it closes. This utilizes the pressure difference of the medium to achieve the check and anti-backflow function. ?
Applicable Scenarios
?Water conservancy systems?: Used in flood control and drainage projects such as rivers and reservoirs.
?Municipal sewage?: Installed at the end of drainage pipelines in treatment plants to prevent sewage backflow.
?Industrial settings?: Suitable for pipeline systems in coal chemical, petrochemical, and other industries requiring backflow prevention. ?
Specifications and Installation
?Diameter?: Circular models are suitable for pipelines ≤2 meters, while rectangular models are used for drainage systems >2 meters.
?Pressure?: Nominal pressure ranges from 0.1MPa to 1.0MPa, with high-pressure models capable of up to 1.6MPa.
?Installation requirements?: A 400mm operational space must be reserved, and a 1:5 slope should be set below the outlet to ensure sealing performance. ?
Materials and Characteristics
Constructed with stainless steel hinges and rubber sealing components, it features corrosion resistance, high strength, excellent sealing performance, long service life, and easy maintenance.