Design standard specification for knife gate valve

Knife gate valve is a commonly used pipeline shut-off valve, which has the characteristics of simple structure, good sealing performance, and easy operation. In order to ensure the safe and reliable operation of the knife gate valve, the following standards should be followed during the design process

1、 Structural form and size

1. Knife gate valves should be designed with a compact structure, minimizing the external dimensions of the valve body to facilitate installation and save space.

2. The valve body should adopt a horizontal or vertical structure to facilitate pipeline connection and operation.

3. The valve stem should adopt a straight or rotating structure to ensure flexible and smooth switching.

4. The valve seat should be made of materials with good sealing performance, such as stainless steel, copper alloy, etc., to ensure sealing performance.

4. The valve disc and seat should be designed with double-sided sealing to improve sealing performance and stability.

2、 Material selection and quality

1. The valve body should be made of carbon steel or stainless steel material to ensure corrosion resistance and service life.

2. The valve stem should be made of high-strength steel to improve impact resistance and wear resistance.

3. The sealing material should be selected from materials that are resistant to high temperatures, wear, and corrosion, such as rubber, polytetrafluoroethylene, etc.

4. All materials shall comply with relevant standards and quality requirements to ensure product quality and reliability.

3、 Sealing performance and reliability

1. Knife gate valves should have good sealing performance to ensure that the medium inside the pipeline does not leak.

2. In the closed state, there should be no gap between the valve disc and the valve seat to prevent medium leakage.

3. In the open state, the gap between the valve disc and the valve seat should be appropriate to ensure smooth flow of the medium.

4. The sealing material should have good elasticity and wear resistance to ensure long-term use without failure.

Here are some examples for everyone, such as a knife gate valve used for high-temperature media, which should be made of high-temperature resistant materials such as stainless steel, high-temperature alloys, etc. In addition, the sealing performance of the valve should also be considered to prevent medium leakage. For knife gate valves used in corrosive media, corrosion-resistant materials such as stainless steel, titanium alloy, etc. should be selected. In addition, the sealing performance of the valve should also be considered to prevent medium leakage.

Overall, the design standards for knife gate valves are a complex task that requires comprehensive consideration of multiple factors. Designers should have rich experience and professional knowledge in order to design safe and reliable knife gate valves.