Structural DesignManual flat valves are usually composed of a valve body, valve plate, valve stem, handwheel, and other parts. The valve body is generally cast with cast iron, ductile iron, cast steel, or stainless steel, and possesses good pressure resistance and corrosion resistance. The valve plate is a flat plate structure that fits tightly with the inner wall of the valve body and is used to cut off or conduct fluid. The valve stem connects the valve plate and the handwheel, and drives the valve stem up and down by rotating the handwheel, thereby realizing the opening and closing of the valve plate.
Working Principle: When the handwheel is rotated clockwise, the valve stem drives the valve plate to move downward, gradually cutting off the fluid channel until it is completely closed and preventing the fluid from passing; when the handwheel is rotated counterclockwise, the valve stem drives the valve plate to move upward, opening the fluid channel, so that the fluid can pass through the valve body smoothly.

Features and Advantages
Good sealing: High-quality sealing materials and advanced sealing structures, such as rubber sealing rings and polytetrafluoroethylene gaskets, are used between the valve plate and the valve body to ensure that fluid leakage can be effectively prevented in the closed state, achieving a high sealing level, and meeting various working conditions with high sealing requirements.
Low Flow Resistance: Due to its relatively flat internal channel, the fluid encounters less resistance when passing through the valve. When the valve is fully opened, there is almost no obvious obstruction to the flow of the fluid, thereby reducing energy loss and improving the operating efficiency of the system.
Easy to operateManual operation is performed through the handwheel, without the need for an additional power source, and the operation is simple and intuitive, easy to master. The valve can be opened and closed by simply rotating the handwheel, and the rotation force of the handwheel is moderate, which will not be too laborious, and is convenient for on-site operators to operate quickly and accurately.
High reliability: The overall structure is sturdy and durable, the connection between the components is tight and reliable, it can withstand high pressure and temperature, it is not easy to fail during long-term use, has a long service life, reduces the frequency of repairs and replacements, and reduces maintenance costs.
Strong versatility: Manual flat valves are available in a variety of specifications and sizes, with nominal diameters usually ranging from DN15 to DN1000 or even larger, which can meet the flow requirements of different pipeline systems. At the same time, it has a variety of connection methods, such as flange connection, butt clamp connection, etc., which can be easily connected and installed with various pipelines and equipment.