National Standard Ball Valve

I. Flanged Ball Valve – Product Overview
　　 The Q41F/PPL/H manual flange ball valve not only boasts a simple structure and excellent sealing performance, but also features a compact design, lightweight construction, minimal material usage, and small installation dimensions—all within a certain range of nominal bore sizes. Additionally, it requires low operating torque, making it easy to operate and enabling quick on-off actions. As a result, this valve has become one of the fastest-growing valve types over the past decade or so. The manual flange ball valve evolved from the plug valve, with its closing member designed as a spherical body that rotates 90° around the valve stem’s axis to achieve opening and closing functions. Floating ball valves are primarily used in pipelines for cutting off, distributing, and redirecting fluid flow. They find extensive applications across various industries, including chemical manufacturing, pharmaceuticals, and food processing; power generation systems such as hydroelectric, thermal, and nuclear plants; municipal and industrial water supply, heating, and gas distribution networks; agricultural irrigation and drainage systems; and metallurgical operations. In short, these valves are critical mechanical products deeply intertwined with infrastructure development, national defense, and everyday life. Manual flange ball valves play a vital role in sealing off or connecting media flow within diverse piping systems, ensuring that fluids are delivered precisely to their intended destinations according to pre-defined operational procedures.
II. Flanged Ball Valve – Product Features
(1) The fluid resistance is low, with a drag coefficient equal to that of a pipe section of the same length.
(2) Simple structure, small size, and lightweight.
(3) Tight and reliable, ball valves currently utilize plastic as the sealing surface material, offering excellent sealing performance and making them widely applicable even in vacuum systems.
(4) Easy to operate and quick to open or close—simply rotate 90° from fully open to fully closed, making it convenient for remote control.
(5) Easy to maintain, ball valves have a simple structure, and their sealing rings are typically removable, making disassembly and replacement quite convenient.
(6) When fully open or fully closed, the sealing surfaces of the sphere and valve seat are isolated from the medium, ensuring that media passage does not cause erosion of the valve's sealing surfaces.
(7) It has a wide range of applications, with nominal diameters ranging from just a few millimeters to several meters—and can be used across everything from high vacuum to high-pressure conditions. When the ball rotates 90 degrees, it should fully expose its spherical surface at both the inlet and outlet, effectively blocking the flow.
III. Flanged Ball Valve – Main Component Materials

IV. High-Platform Flanged Ball Valve Technical Specifications

V. Flanged Ball Valve Performance Specifications

VI. Ordering Information for Flanged Ball Valves
Please fill out the "Specification Sheet" or specify the following when placing your order:
1. If the model has not been selected before placing an order, please provide us with the following usage parameters: 1. Nominal diameter, 2. Fluid properties (including nominal pressure, temperature, viscosity, or acidity/alkalinity), and 3. Valve body and valve core materials.
2. If the design unit has already selected our company's product model, please place your order directly with our Sales Department according to the specified model.
3. When the application scenario is critical or the piping system is particularly complex, please provide design drawings and detailed specifications whenever possible, so our experts can review and ensure everything meets your requirements.