application : instrument . Thermometer bellows coupling bellows  fuel level gauge valve copper bellows  no sealing  high pressure bellows   vacuum bellows  sensor bellows  vacuum switch

types of joints :  1, both ends are external joints  WW type   

                 2, both ends are internal joints   NN type

                 3, one end is external joints , the other with bottom   WDtype   

                 4, both ends are side cut from the trough  QdQd type

the Bellows:

 extremely flexible,

• have a long life expectancy

• do not need any maintenance,

• are resistant to pressure and to temperature,

• are vacuum-tight.