screwjacks

  The   plug valve   is a quick opening and closing valve. Plug valves are suitable for multi-channel structures, so one valve can obtain two, three or even four different flow channels. This can simplify the design of the pipeline system, reduce the amount of valves and connecting fittings. Plug valves can be divided into soft seal and hard seal structures according to different sealing materials. 1. Lift Soft Seal Plug Valve (1) Structural features ① The valve adopts soft sealing structure, with reliable sealing performance and zero leakage. ② During the opening and closing operation, there is no wear between the sealing surfaces. It has a long service life. ③ The valve has double blocking, double discharge and fire protection functions. ④ The valve is equipped with a pressure balancing device to prevent abnormal pressure rise of the system and reduce the resistance at the moment of opening and closing of the valve. ⑤ The opening and closing process is completed in two stages, which

  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 ℃, low-temperature resistant shell mat

  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 of metallurgy, light industry, elec