screwjacks

  In the process of using the valve, we will encounter various working conditions, such as high temperature and low temperature. In this case, how should we choose the valve? 1. High Temperature Conditions When selecting valves, it is necessary to consider using shell materials and internals materials with high temperature strength, such as austenitic   stainless   steel   valve   and bidirectional stainless steel. The selected materials should not be bonded, plasticized and creep due to high temperature, the gap cannot not be too small. Applicable valve types include   gate valve ,   butterfly valve , etc. If the temperature has exceeded the temperature range that the metal can bear, the special valves with ceramic lining can be used, and the cooling jacket structure can also be used to keep the internal metal within the allowable stress range through circulating water cooling. 2. Low Temperature Conditions When the temperature is lower than - 29 ℃, l...

  The biggest difference between the   ball valve   and the   butterfly valve   is that the opening and closing parts of the butterfly valve are a plate, while the ball valve is a ball. Characteristics of Butterfly Valve: 1. Simple structure, low consumption and low cost, but poor tightness and bearing capacity; 2. Quick opening and closing, small flow resistance; 3. It is suitable for making large diameter valves; 4. In the cylindrical channel of the   butterfly valve   body, the disc shaped butterfly plate rotates around the axis with a rotation angle of 0 °~90 °. When the rotation angle reaches 90 °, the valve is fully open; 5. It can be used for media with suspended solid particles, and can also be used for powder and granular media according to the strength of its sealing surface; 6. It can be applied to the two-way opening and closing and adjustment of ventilation and dust removal pipelines, and is widely used in the gas pipelines and waterways o...