Control valves are essential components in industrial process systems, used to regulate the flow, pressure, temperature, or level of fluids such as water, steam, gas, or chemicals. There are several types of control valves, each designed for specific applications and operating conditions. Here are some common types of control valves:

1. Globe Valves:

   • Globe valves are linear motion valves with a globe-shaped body and a movable plug or disc that controls the flow of fluid through the valve.
   • They are commonly used for precise throttling and control of flow rates in applications requiring moderate to high pressure differentials.

2. Butterfly Valves:

   • Butterfly valves are quarter-turn valves with a circular disc that rotates perpendicular to the flow direction to control the flow of fluid.
   • They are suitable for applications requiring quick opening and closing or for throttling flow in large pipelines with low-pressure drops.

3. Ball Valves:

   • Ball valves are quarter-turn valves with a spherical disc (ball) that rotates 90 degrees to control the flow of fluid through the valve.
   • They offer tight shutoff and low frictional resistance, making them suitable for on/off control and isolation applications in various industries.

4. Diaphragm Valves:

   • Diaphragm valves use a flexible diaphragm to regulate the flow of fluid by flexing or moving in response to changes in pressure.
   • They are commonly used for controlling corrosive, abrasive, or viscous fluids in industries such as chemical processing, pharmaceuticals, and water treatment.

5. Plug Valves:

   • Plug valves consist of a cylindrical or tapered plug that rotates within the valve body to control the flow of fluid.
   • They are suitable for on/off control and throttling applications in industries such as oil and gas, petrochemical, and wastewater treatment.

6. Needle Valves:

   • Needle valves have a long, tapered needle-shaped plug that fits into a matching seat to control the flow of fluid with precision.
   • They are commonly used for fine flow control and metering applications requiring high accuracy and resolution.

7. Control Ball Valves:

   • Control ball valves are specialized ball valves designed for precise control of flow rates using a characterized or segmented ball.
   • They offer linear or equal percentage flow characteristics and are commonly used in HVAC, process control, and steam applications.

8. Angle Valves:

   • Angle valves have an angled body design with an inlet and outlet at a 90-degree angle, allowing for easier installation in tight spaces or piping configurations.
   • They are commonly used for throttling flow or providing isolation in applications with limited space constraints.

9. Pinch Valves:

   • Pinch valves use a flexible elastomeric tube or sleeve that is pinched or compressed to control the flow of fluid through the valve.
   • They are suitable for handling abrasive or slurry fluids and are commonly used in mining, wastewater treatment, and bulk material handling applications.

10. Three-Way Valves:

    • Three-way valves have three ports and are used to divert, mix, or distribute flow between multiple inlet and outlet streams.
    • They are commonly used in process control, HVAC, and fluid distribution systems.

These are some of the common types of control valves used in industrial applications. The selection of the appropriate type of control valve depends on factors such as the application requirements, process conditions, fluid properties, and system design considerations.