低溫閥安裝在室溫下.在低溫下工作，溫度變化范圍很大。如果設計的話.如果安裝不當，很容易產生熱應力或變形。同時，閥門的操作部分處于正常溫度，循環部分處于低溫。為了減少冷損失，閥桿通常很長，容易變形和卡住。低溫閥通常在室溫下轉動靈活，在低溫下非常緊，甚至無法打開。良工閥門在低溫下卡住的主要原因是：

The low-temperature valve is installed at room temperature Working at low temperatures results in a wide range of temperature fluctuations. If designed If installed improperly, it is easy to generate thermal stress or deformation. At the same time, the operating part of the valve is at normal temperature, and the circulating part is at low temperature. To reduce cold losses, valve stems are usually long and prone to deformation and jamming. Low temperature valves usually rotate flexibly at room temperature and are very tight at low temperatures, even unable to open. The main reason why Lianggong valves get stuck at low temperatures is:

1.安裝良工閥門過程中，閥門和管道配置不合理，或管道冷補償能力差，低溫能力差，低溫下閥門位置發生變化；或閥門支架不足，低溫下變形；或閥門固定不當，冷卻箱在低溫下變形，影響閥桿與閥體的同心度。

During the installation of Lianggong valves, if the valve and pipeline configuration is unreasonable, or if the pipeline has poor cold compensation capability and low temperature capability, the valve position may change at low temperatures; Or the valve bracket is insufficient and deformed at low temperatures; Improper valve fixation may cause deformation of the cooling box at low temperatures, affecting the concentricity of the valve stem and body.

2.在設計上，由于良工閥門閥桿和閥套的材質不同，線膨脹系數也不同。閥桿一般采用不銹鋼，線膨脹系數為1.73×10-6℃-1、黃銅閥套，線膨脹系數19.9×10-6℃-1.也就是說，黃銅的收縮率大于不銹鋼，在低溫下可能會咬到螺紋。特別是當使用暗桿結構和細齒螺紋時，螺紋的溫度變化范圍大，螺紋間隙小，更容易咬。

2. In terms of design, due to the different materials of Lianggong valve stem and valve sleeve, the coefficient of linear expansion is also different. The valve stem is generally made of stainless steel with a linear expansion coefficient of 1.73 × 10-6 ℃ -1. The brass valve sleeve has a linear expansion coefficient of 19.9 × 10-6 ℃ -1. This means that the shrinkage rate of brass is greater than that of stainless steel, and it may bite the threads at low temperatures. Especially when using concealed rod structures and fine tooth threads, the temperature variation range of the threads is large, the thread clearance is small, and it is easier to bite.

3.在良工閥門運行過程中，由于閥門加熱不徹底，或閥門填料進水，導致低溫下結冰，或在室溫下閥門關閉過緊，使螺紋咬傷等。

During the operation of Lianggong valves, if the valve is not heated thoroughly, or if the valve packing is filled with water, it may freeze at low temperatures, or if the valve is closed too tightly at room temperature, causing thread bites, etc.

以上的精彩內容來自：上海良工閥門山東銷售處更多精彩內容請點擊我們的網站查看更多：http://www.szjuewu.com

The above exciting content comes from: Shanghai Lianggong Valve Shandong Sales Office. For more exciting content, please click on our website to view more: http://www.szjuewu.com