Classification :

Expansion bellows contain :Metal expansion bellows,expansiion joint, bellow exchange for heat 65279 ,pipe,metal soft joint,Diaphragm mainly application are compensation for deformation caused by heating,shock absorptioin,absort the pipeline deformation ��subside ,widely used in inlet and outlet of pumps ,hight building noise decrease,compensation for heat pipe,high street construction fancoil ,central air conditioning equipment ,shock absorption . "changmao"brand with obviously character is good resistance to heat ,long using life,good resistance to pressure,great compensation ,afford axial,lateral displacement .outstanding performance .

Working principle :

Expansion bellows include folding wrinkles along the direction of folding retractable flexible tube connected into the sensor. It's open end of a fixed, closed-ended in a free state, and use the auxiliary spiral spring or the spring to increase flexibility. Work under internal pressure along the tube length of the extension, where the displacement arise from , needle could indicate the pressure size. Bellows often combined with the displacement sensors constitute the output power of pressure sensors, sometimes used as a separate component. As the bellows extension required a large volume change, so the response rate is lower than it Bourdon tube. Suitable for measuring low pressure bellows.