Industrial bolted bonnet gate valves are a type of gate valve commonly used in various industrial applications where reliable flow control and ease of maintenance are essential. Here’s an overview of these valves:

1. Design: Bolted bonnet gate valves consist of a gate, a bonnet, a valve body, a stem, and a handwheel or actuator. The gate moves up and down within the valve body to control the flow of fluid, while the bonnet provides a cover for the valve internals and is secured to the valve body with bolts. The bolted bonnet design allows for easy access to the valve internals for maintenance or repair.

2. Bolted Bonnet: The bolted bonnet serves as a removable cover for the valve body, allowing access to the internal components such as the gate, stem, and seating surfaces. The bonnet is bolted or threaded to the valve body, providing a secure seal to prevent leakage. When maintenance or repair is required, the bolts are removed to access the internals.

3. Gate: The gate in a bolted bonnet gate valve moves vertically within the valve body to open or close the flow passage. When the valve is open, the gate is lifted or lowered into the bonnet, allowing fluid to pass through. When closed, the gate seals against the valve seat to prevent flow.

4. Stem: The stem is connected to the gate and extends through the bonnet to the handwheel or actuator. As the handwheel is turned, the stem rises or lowers, lifting or lowering the gate to control the flow of fluid. The stem’s movement provides a direct indication of the valve’s position.

5. Handwheel or Actuator: Bolted bonnet 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.

6. Materials: Bolted bonnet gate valves are available in various materials to suit different applications and operating conditions. 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.

7. Pressure Rating: These 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, depending on the ANSI standard or equivalent.

8. Size Range: Bolted bonnet 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.

9. Applications: Bolted bonnet 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.

10. Maintenance: The bolted bonnet design of these valves allows for easy access to internal components, facilitating maintenance, inspection, and repair. Regular maintenance is essential to ensure the proper operation and longevity of bolted bonnet gate valves. This may include lubrication of moving parts, inspection of seals and gaskets, and cleaning or replacement of worn components.

Overall, industrial bolted bonnet gate valves are versatile and reliable components used in a wide range of industrial applications to control the flow of fluids. Their robust construction, ease of maintenance, and compatibility with various operating conditions make them suitable for demanding industrial processes. Proper selection, installation, operation, and maintenance are essential to maximize the performance and efficiency of bolted bonnet gate valves in industrial applications.