Bellow Sealed Stop Valve

The bellow sealed stop valves designed with double wall bellow sealing, secondary safety packing and nonrising handwheel. They are specially recommended for steam, gas,liquid, condensate, thermal oil and water applications.
Metal bellow sealed stop valve is a linear actuation valve and are primarily designed to stop, start and regulate flow. The disc of the globe valve may be completely removed from the flow path or may completely block the flow path.Globe valves are used extensively to control flow. Flow control, pressure drop and duty range must be considered in valve design to prevent premature failure and ensure satisfactory service. Valves subjected to high differential pressure relief service require specially designed valve trim.
Our bellows sealed stop valves are engineered to maintain plant safety and save energy by totally eliminating stem seal leaks.
Zero emissions are guaranteed, ensuring our valves meet the most stringent worldwide emissions legislation.

bellow sealed stop valve

A bellows seal globe valve is an essential component in many industries, such as chemical, oil and gas, and petrochemical industries. It is a type of industrial valve used to regulate and control the flow of fluids, gases, and other media through a pipeline or system. These bellows valves are widely used because of their unique design, which includes a bellows seal that protects the stem from corrosion and prevents fluid from eroding the stem. So it's very common to see the condition for corrosive or toxic media.
The bellow sealed stop valve consists of body, disc, stem, bonnet, bellows seal, and packing. The valve body is the primary component that houses the valve disc, which controls the flow of media. The valve stem connects the valve disc to the actuator or handwheel, which opens or closes the valve. The bonnet covers the stem and packing and the bellows valve provides a seal to prevent leakage. The following is the parameter information of bellow sealed stop valve.

For bellows seal globe valve, the lower end bellows is welded on the valve stem to prevent the process fluid from eroding the valve stem. The other end is placed between the valve body and the valve cover to form a static seal. The double seal design ensure that if bellow seal pakcing fails, the stem packing will also function.
The bellow seal globe valves are applicable for media like steam, flammable, explosive, heat transfer oil, high purity, and toxic media etc.

Standard:API598,DIN3356,BS7350

Size:DN15~DN600mm

Medium:water , oil , gas,steam

Connection:Flange Ends

Material:forged steel A105, A105N, 304, 316, F11, F22

Color:Black or customer's request

Test Stanard:API598

Face To Face:ANSI B 16.10

Applicable Temperature：-29℃~+425℃

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Installation site view

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Packing & Delivery

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Purpose of Bellows in Valves
The primary purpose of bellows in valves is to provide a flexible, leak-proof seal that protects the stem from corrosion and prevents fluid from eroding the stem. Bellows are also used to compensate for changes in temperature and pressure in the system, which allows the valve to operate smoothly and efficiently.

Difference between Bellows Seal Valve and Common Valve

The primary difference between a bellows seal valve and a common valve is the presence of a bellows seal. A bellows seal valve has flexible metal bellows that provide a leak-proof seal and protect the stem from corrosion, while a normal valve does not have this feature.

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