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   QGD47Y軌道球閥,電動軌道球閥

	 
                
	   
                QGD47Y軌道球閥,電動軌道球閥
                
	   
                傳統的球閥，無論是浮動式或固定式，球體與閥座始終接觸，開關扭矩大，密封面容易損傷，軌道球輪著啟閉時，球體先偏轉-δ角，然后轉動，開關全過程中球體與閥座脫離，故閥座不會被擦傷，并且啟閉扭矩小。 
                
	 
                		

                	
				
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