Industrial non-rising stem ANSI gate valves are specifically designed gate valves that conform to the standards set by the American National Standards Institute (ANSI). These valves are commonly used in industrial applications where reliable flow control and adherence to standardized specifications are crucial. Here’s a detailed overview:

1. Design: ANSI gate valves feature a non-rising stem design, where the stem remains stationary while the gate moves up and down within the valve body to control the flow of fluid. This design is space-efficient and suitable for installations with limited vertical space. The gate is typically wedge-shaped or parallel-sided and moves vertically to open or close the flow passage.

2. ANSI Standards: ANSI gate valves are manufactured in accordance with ANSI standards, which define the dimensions, materials, testing procedures, and performance requirements for various types of industrial valves. ANSI standards ensure interoperability, compatibility, and quality consistency across different manufacturers and suppliers.

3. Pressure Rating: ANSI gate valves are available in various pressure ratings to suit different applications and operating conditions. Common pressure ratings include Class 150, Class 300, Class 600, Class 900, and Class 1500. The pressure rating of the valve should match the maximum operating pressure of the system to ensure reliable performance and safety.

4. Materials: ANSI gate valves are constructed from materials that comply with ANSI standards and are suitable for the intended application and operating environment. Common materials include carbon steel, stainless steel, cast iron, bronze, and various alloys. The choice of material depends on factors such as the fluid being handled, temperature, pressure, and corrosion resistance requirements.

5. Size Range: ANSI gate valves are available in a wide range of sizes to accommodate different pipeline diameters and flow rates. Standard sizes typically range from 2 inches to 48 inches or larger, although custom sizes may be available upon request. The valve size should be selected based on the pipeline size and flow requirements of the application.

6. End Connections: ANSI gate valves are available with various end connections to suit different piping configurations and installation requirements. Common end connection types include flanged ends, butt weld ends, threaded ends, and socket weld ends. The choice of end connection depends on factors such as the piping material, size, and pressure rating.

7. Applications: ANSI gate valves are widely used in industries such as oil and gas, petrochemical, water treatment, power generation, and manufacturing. They are suitable for both on-off and throttling applications and can handle a wide range of fluids, including water, steam, oil, gas, and chemicals. ANSI gate valves are often specified in projects where adherence to standardized specifications is required.

8. Actuation: ANSI gate valves can be operated manually using a handwheel or equipped with pneumatic, hydraulic, or electric actuators for automated operation. Actuators provide remote control and can be integrated into control systems for process automation and optimization.

9. Quality and Testing: ANSI gate valves undergo rigorous quality control and testing procedures to ensure compliance with ANSI standards and performance requirements. This may include hydrostatic testing, pneumatic testing, material testing, and dimensional inspection. Quality assurance measures help ensure the reliability, safety, and durability of ANSI gate valves in industrial applications.

Overall, ANSI non-rising stem gate valves are critical components used in industrial piping systems to control the flow of fluids. Their adherence to ANSI standards ensures quality, reliability, and compatibility, making them suitable for a wide range of applications across various industries. Proper selection, installation, operation, and maintenance are essential to maximize the performance and efficiency of ANSI gate valves in industrial processes.