KT2520K26000DCW28QAS import spot

High frequency probe high frequency line can be customized other specifications

MOSFET imported original FET

Selection and design of imported high temperature steam pneumatic control valves and high pressure explosion-proof boiler electric control valves

1. Understand the function of the pneumatic control valve: It is used in equipment to regulate airflow or gas flow. Consider the working conditions such as the type of medium, operating pressure, and temperature.

2. Determine the nominal diameter and connection method of the pipe connected to the pneumatic control valve, such as flange, threaded, or welded connections.

3. Choose the type of pneumatic control valve based on application requirements. Common types include gate valves, globe valves, ball valves, butterfly valves, throttle valves, safety valves, pressure reducing valves, and steam traps.

4. Decide on the actuation mode: it can be either linear or angular stroke, depending on the system's needs.

5. Select the appropriate type of pneumatic regulating valve, such as a closed-loop, adjusting, or safety valve, depending on the application.

6. Define the parameters for the pneumatic regulating valve. For automatic systems, determine factors like allowable flow resistance, discharge capacity, and back pressure. This helps in selecting the correct pipe size and seat hole diameter.

7. Choose the operation method: manual, electric, electromagnetic, pneumatic, hydraulic, or electro-hydraulic linkage, based on the system’s requirements.

8. Select materials for the valve body and internal components according to the medium, pressure, and temperature. Common materials include gray cast iron, carbon steel, stainless steel, copper alloys, and more.

9. Finalize usage precautions to ensure safe and efficient operation.

How to Choose a Valve Based on Flow Characteristics

The shape of the valve's closing element and the flow channel determines its flow characteristics, which must be considered when selecting a valve.

1. For shut-off valves: Valves with low flow resistance and straight-through flow are typically chosen. These include gate valves, globe valves, and plunger valves. Downward-closing valves are less common due to higher flow resistance, but they may be used where higher resistance is acceptable.

2. For flow control: Valves that allow precise flow adjustment are preferred. Examples include control valves, throttle valves, and plunger valves, as their flow is proportional to the opening stroke. Rotating valves like plug valves, ball valves, and butterfly valves can also be used for throttling, though they are limited in size range. In some cases, globe valves are modified for throttling, but this is not ideal because it can damage the sealing surface and reduce effectiveness.

3. For diverting or reversing flow: Valves with three or more channels are suitable, such as plug valves and ball valves. These are commonly used for switching flow directions. Other valve types can also be used if properly connected for multi-path flow.

4. For media with suspended particles: Valves that clean the sealing surfaces during operation, like gate valves, are best suited for such applications to prevent clogging and ensure smooth operation.