1、Classification of Stainless Steel Gate Valves: 2、Advantages of Stainless Steel Gate Valve: 1. It has low fluid resistance, the sealing surface is little scoured and eroded by the medium; 2. Opening and closing is labor-saving; 3. The flow direction of media is unrestricted; 4. Good manufacturing technology, reliable sealing performance, corrosion resistance and wide application range. 3、Disadvantages of Stainless Steel Gate Valve: 1. It is easy to cause erosion and scratch between sealing surfaces； 2. The overall dimension is large, so it needs a certain space for opening, the opening and closing time is long； 3. Complex structure. 4、Precautions for Installation of Stainless Steel Gate Valve: 1. It is generally installed horizontally in the pipeline; 2. Hand wheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited; 3. The bypass valve should be opened before the gate valve with bypass valve is opened (To balance the pressure difference between the inlet and outlet and reduce the opening force); 4. The gate valve with transmission mechanism should be installed according to the provisions of the product operation manual; 5. If the valve is opened and closed frequently, lubricate it at least once a month.

Butterfly valves are divided into concentric butterfly valve, single eccentric butterfly valve, double eccentric butterfly valve and three eccentric butterfly valve. What are the main differences between these four butterfly valves? Now, Dervos will introduce to you: 1. Concentric Butterfly Valve (Midline Butterfly Valve) The structural feature of the concentric butterfly valve is that the valve stem axis, the center of the butterfly plate and the center of the body are in the same position. It has the advantages of simple structure and convenient manufacture. The disadvantage is that the butterfly plate and valve seat are always in the state of extrusion and scratch, with large resistance distance and fast wear. In order to overcome extrusion and scratch and ensure sealing performance, the valve seat basically adopts elastic materials such as rubber or polytetrafluoroethylene, but the use of sealing materials is limited by temperature. 2. Single Eccentric Butterfly Valve The structural feature of the single eccentric butterfly valve is that the axis of the valve stem deviates from the center of the butterfly plate, so that the upper and lower ends of the butterfly plate no longer become the rotation axis, which disperses and reduces the excessive extrusion between the upper and lower ends of the butterfly plate and the valve seat, and solves the extrusion problem between the butterfly plate and the valve seat of the concentric butterfly valve. However, the scratch phenomenon between the butterfly plate and the valve seat has not disappeared in the whole opening and closing process of the valve. Therefore, the application range of single eccentric butterfly valve is similar to concentric butterfly valve, and there are few applications. 3. Double Eccentric Butterfly Valve The double eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve. Its structural feature is that the axis of the valve rod deviates from the center of the butterfly plate and the center of the body. The effect of double eccentricity enables the butterfly plate to leave the valve seat immediately after the valve is opened, which greatly eliminates the unnecessary excessive extrusion and scratch between the butterfly plate and the valve seat, reduces the opening resistance and wear, improves the service life of the valve seat. The scratch is greatly reduced, so that the double eccentric butterfly valve can adopt metal seat, which improves the application of butterfly valve in high temperature field. However, the sealing effect is produced by the elastic deformation caused by the extrusion of butterfly plate and valve seat. It has high requirements for the closing position (especially the metal valve seat), low pressure bearing capacity and large leakage. 4. Three Eccentric Butterfly Valve To withstand high temperature, hard seal must be used, but the leakage is large; to achieve zero leakage, soft seal must be used, but it is not resista...

플러그 밸브는 간단한 구조, 빠른 개폐 및 낮은 유체 저항.을 가진 가장 초기에 사용된 밸브 중 하나입니다. 일반 플러그 밸브는 완성된 금속 플러그 본체와 밸브 본체,가 밀봉 불량의 단점, 개폐력이 크고 마모가 쉽다. 낮은(1 mpa 이하) 및 작은 직경(100 mm 미만)에서만 사용할 수 있음. 플러그 밸브의 적용 범위를 확장하기 위해, 많은 새로운 구조가 개발되었습니다. 오일 씰 플러그 밸브가 가장 중요한 것입니다. 테이퍼 구멍 사이의 플러그 본체 상단에서 특수 그리스가 주입됩니다. 밸브 본체와 플러그 본체는 오일 필름을 형성하여 개폐 토크를 줄이고 밀봉 성능과 수명을 향상시킵니다. 작동 압력은 64 mpa에 도달할 수 있습니다, 최대 작동 온도는 325℃에 도달할 수 있습니다, 최대 직경은 600mm에 도달할 수 있습니다. 플러그 밸브의 닫는 부분은 구멍,이 있는 실린더로 채널.을 열고 닫기 위해 채널,에 수직인 축을 중심으로 회전합니다. 장점 플러그 밸브: 1. 빈번한 작동이 용이함, 빠른 개폐; 2. 낮은 유체 저항; 3. 간단한 구조, 상대적으로 작은 부피, 경량 및 쉬운 유지 보수; 4. 우수한 밀봉 성능; 5. 설치 방향은 제한이 없습니다., 매체의 흐름 방향은 임의적일 수 있습니다. 6. 진동이 없고 저소음. 분류 플러그 밸브: 1. 구조별: 밀폐형 플러그 밸브, 자체 밀봉 플러그 밸브, 압력 균형 플러그 밸브 및 오일 시일 플러그 밸브; 채널별 2.: 직선형 플러그 밸브, 3방향 플러그 밸브 및 4방향 플러그 밸브. 플러그 밸브의 채널은 많은 형태를 가지고 있습니다.. 일반적인 직선형은 주로 유체를 차단하는 데 사용됩니다. 3방향 및 4방향 플러그 밸브는 유체 반전에 적합합니다..