Application: The energy-saving side-opening flap gate is a crucial equipment for ensuring the safe operation of pump stations. Its role in the pump station is to prevent flow interruption and backflow during shutdowns. It is mainly used for flood control and drainage, agricultural irrigation, urban water supply and drainage, inter-basin water transfer, as well as water supply and distribution for large-scale industrial enterprises.
★ Key Technical Features:
1. No need for any opening and closing devices; it can operate automatically. The most significant feature of the energy-saving side-opening flap gate compared to the suspended flap gate is:
The valve body hinge shaft is vertically arranged and a best tilt angle is designed, utilizing the door's weight component as the closing force. Whether it's a large, medium, or small diameter gate, no opening or closing mechanism is required.
2. Safe and stable, energy-saving and efficient. The energy-saving side-opening flap has low resistance during operation, a large opening angle, and minimal impact force when closing, eliminating water hammer and vortices during outflow. It does not require manual, electric, gas, or liquid control; no human operation is needed, saving a great deal of labor and materials. This enhances the reliability and efficiency of the pump station operation, reduces maintenance costs, and lowers the energy consumption of the pump station. In actual operation, the energy-saving side-opening flap has been tested by the National Water Resources Ministry's Testing Center and has been found to save 22.5% of electrical energy compared to suspended flaps.
3. Easy maintenance with a long service life. The Fengtai brand door closer's valve shaft is made of stainless steel, and the pin bushing is a copper alloy graphite lubricated bearing, which is corrosion-resistant and provides reliable sealing. The door mount is made of carbon steel; the product has a simple and reasonable structure, a unique running path, and a service life of over 30 years, with easy maintenance.
Based on the principles of mechanics, the door panel and hinge shaft are vertically arranged and tilted inward at a certain angle. The horizontal component of the door panel's own weight is utilized as the closing force, thereby reducing the resistance to opening the door and achieving automatic closure.
The flap can open and close freely in both submerged and non-submerged conditions. Its working principle is as follows: when the medium pressure inside the culvert is less than or equal to the external back pressure of the flap, the flap automatically closes. Conversely, when the medium pressure inside the culvert is greater than the external back pressure of the flap, the flap automatically opens.
Primary Technical Specifications
Friction Coefficient: ≤0.01 Head Loss: <0.04M
Opening Angle: 85-90° (and above) Operating Temperature: 0-80℃
Equipment Efficiency: Over 73%, compared to suspended flap gates, the medium flow rate is 1/3 higher, and the flow rate is 1/3 greater.
Energy Savings: 22.5% Submerged Head: ≤15M
Hinged doors can be connected with flanges or pre-installed. This means a steel tube is welded onto the back of the door, followed by a concrete pre-burial. The structure is simple and reliable, saving both time and money.
No need for any opening/closing mechanisms, operates automatically, saving substantial labor and materials, and reducing overall costs. Gate passage range: 300-1800MM, no need for manual, electric, gas, or liquid control; no human operation required, maintenance-free. Circular or square gates with passage sizes of 2000-5000MM, with 3-12M installation lift head, can achieve both quick opening and slow closing operations that are safe and reliable. Just add a simple, reliable, power-free, and no-human-operation variable-speed buffering device to eliminate impacts and water hammer effects.
Easy to maintain and long-lasting lifespan. The main body of the gate is made of cast iron with a QT500 rating or higher, the hinge shaft is made of stainless steel, and the sleeve is a ball pivot type self-lubricating bearing with a copper alloy base. Double sealing (carbon steel + wear-resistant rubber), the mating parts will not rust, and can be used for over 30 years.
Safe and stable, energy-saving and efficient. Low resistance during operation, large opening angle, minimal impact when closing, eliminating water hammer and whirlpool at the outlet, enhancing operational reliability and equipment efficiency, reducing operation and maintenance costs, and lowering energy consumption of the pump station.
