Bellows Seal Globe Valve Preferred for Boiler Rooms

For steam systems, the main steam valve and sub-cylinder are the sources of the steam distribution system. The shut-off valve installed in the sub-cylinder has a significant impact on the entire steam system at the back end. The user is often unaware of the need for a shut-off valve on a sub-cylinder, and as a result, their needs are often unclear. In many cases, the importance of the valve is not recognized during the procurement and installation stages, but only during operation and use, because management and procurement personnel do not understand its application. So, what are the requirements for manual valves on sub-cylinder applications? We introduce the Bellows Seal Globe Valve below.

Here is the content list:

l Structural Features

l Performance requirements

l Features of Bellows Seal Globe Valve

Structural Features

The Bellows Seal Globe Valve has a high operating pressure. The Bellows Seal Globe Valve has a high differential pressure at the front end of the steam system. In particular, frequent switching for systems that operate partially or fully intermittently have a high maintenance costs. Since it is at the source of steam distribution, a steam stoppage affects the operation of the entire downstream system. In addition, the large differential pressure and large diameter make maintenance difficult. There are more valves, which need special insulation. These are the reasons why we choose Bellows Seal Globe Valve. This can greatly reduce the difficulty of our operation.

Performance requirements

For general globe valves, the stem seal needs to be pressed against the packing, making the stem friction very high, and sometimes the operator needs to use a human wrench to operate it. This brings many problems. If the valve is operated with F-wrench, it is easy to exert too much force and close too tightly, which will easily lead to damage to the parts and affect the normal operation of the valve. On the contrary, if the force is not enough, the valve will not be closed enough, leading to internal leakage. And the long time internal leakage will lead to the spool drawing and permanent failure to close, resulting in energy waste. Using Bellows Seal Globe Valve can solve the above problems very well.

Features of Bellows Seal Globe Valve

Bellows Seal Globe Valve does not have the problem of packing wear, and the bellows are welded to the valve stem, which completely eliminates leakage at the valve stem. Since the bellows expand and contract with the valve movement, it is necessary to have a certain flexibility and strength. Therefore, the bellows material requirements are high, using titanium 430 or 316L stainless steel. This is also true for the shut-off valve on the sub-cylinder. In order to protect the sealing surface of the valve, when the valve is opened, the sealing surface should have been removed from the main flow path to prevent the seal from being damaged by vapor erosion Bellows Seal Globe Valve has a regulating spool with this feature, which ensures a longer service life.

These are the reasons why we must choose Bellows Seal Globe Valve in the boiler room. If you have any plans to buy this product in the near future, you can follow Wenzhou Luomai ValveTechnology Co.Ltd. The company is the leader in this industry, and we are sure to give you satisfactory results.