Elbow Pressure Balanced Expansion Bellows are really a combination of several types. These are made from best quality raw material and under the strict supervision of our highly experienced buyers. These are meticulously engineered with high emphasis on quality to make them free from all defects. Elbow Pressure Balanced Expansion Bellows are accomplished by using two bellows both at line pressure tied together and acting in opposite directions. These are used where pressure loading on the piping or equipment is not acceptable.