1) Material: ductile cast iron ASTM-A536

2) Reducing installation costs

3) Flexibility and rigidity

4) Joint reliability

5) Isolate noise and vibration

6) Convenient joint

7) Application: Power plant; Heating,ventilation and air conditioning; Industrial plant; Water treatment; Plumbing; Fire protection; Mining and mine processing; Oil field; Marine. This kind of coupling is specially designed for moderate pressure pipes with good rigidity, and usually used in the occasion, such as fire protection, feed water, oil or gas and etc.