| Forged steel bellow sealed valve, Bellows valves are used as a component of the valve stem seals. It is commonly used in the strict demand of valve stem seal situations, such as the occasion for high vacuum and nuclear industries. Using bellows instead of stuffing on a common valve or with the stuffing and use will enable the stem part of non-leakage, in order to prevent leakage of radioactive materials or precious materials, or to maintain a high vacuum. |