As a component in the pipeline, valves control the connection and cut-off of the fluid. Valve is like a brake pad on the car, one broke, it may lead to unexpected consequences.  Therefore, the valve's performance and service life directly affect the operation of the system.

If the valve is damaged, the system must be shut down for maintenance, the losses which brings immensely outweigh the cost of such a few valves. The quality and life of the valve are so important.

The bellows sealed globe valve is particularly outstanding in both aspects. Its double seal guarantees zero leakage but also reaches zero leakage in the helium mass spectrometry test. Very safe and reliable.

The bellows can be cycled more than 10,000 times without damage,

greatly exceeding the service life of an ordinary globe valve packing seal.

In addition, the bellows sealed valve can prevent external dust from entering the valve body to ensure the cleanliness of the medium. In conditions such as

high-purity silicon powder, pure oxygen, food, vacuum and other working conditions, the bellows globe valves still have a very outstanding performance.

In the process of switching, common globe valves will see dynamic friction between packing and stem, and the packing will be worn and fail.  When globe valves are in high and low-temperature occasions, their packing will expand or contract, packing changes, resulting in packing seal failure; As for low-temperature conditions, the packing is easy to freeze,  the packing is easy to be scratched by ice in the witching process.

In short, the advantages of the bellows globe valve compared with the ordinary globe valve can be summarized as follows.

1. The bellows globe valve can meet the request of zero external leakage in helium mass spectrometry.

2. The service life of the bellows sealed globe valve is much higher than that of the common globe valve, whose packing is susceptible and replacement frequency is higher.

3. The bellows sealed globe valve has a metal barrier at the stem seal, which can be used in working conditions where absolute isolation is required inside and outside the valve.

4. The bellows of the bellows sealed globe valve can expand and contract, which is not affected by thermal expansion and contraction, and it has very obvious advantages in the occasion of large temperature differences.

5. The bellows valve has double sealing. the bellows instinct, the packing is completely isolated from the medium, which protects the packing well and greatly extends the service life.

Dervos is a leading valve manufacturer and provider of engineered products for different industries. If you’re looking for feasible solutions, check out our vast range of high-quality valves which includes gate valves, ball valves, butterfly valves, as well as other control valves and more. For more information regarding our high-quality products, contact us today.