Bellow Seal Valve Manufacturers in Mumbai | Freture Techno Pvt Ltd

Bellow seal valves are used across industries where leakage control and process safety are important. Typical applications include oil and gas, petrochemical processing, chemical manufacturing, refineries, power generation, pharmaceutical processing, and other process industries.

They can be particularly useful for applications involving hazardous or corrosive media, high-temperature services, and systems where minimizing stem leakage is an important requirement.

Materials and Construction

Material selection depends on the process fluid, operating pressure, temperature, corrosion conditions, and other application requirements. Suitable carbon steel, stainless steel, alloy steel, and other engineered materials may be selected according to the service.

The metallic bellows is a critical component of the valve and must be selected to withstand the required operating conditions and repeated movement. Proper bellows design and material selection are important for maintaining reliable sealing performance throughout the valve's operating life.

Standards and Specifications

Bellow seal valves can be designed according to applicable industry standards and project specifications. Freture's published bellow seal valve range includes API 602, MSS SP-117, API 600, and API 6D, with applicable configurations covering different valve types and pressure classes.

The published range includes valve sizes from 15NB to 600NB, with pressure classes varying according to the valve design. Available end connections include flanged, butt weld, socket weld, and screwed arrangements for applicable configurations.

Testing is also important for verifying sealing performance. Freture's bellow seal valve documentation includes helium leak testing and different tightness classifications for fugitive-emission testing.

How to Select the Right Bellow Seal Valve?

Selecting the correct bellow seal valve requires consideration of the process fluid, operating pressure, temperature, line size, pressure class, body and trim materials, end connection, and required sealing performance.

The valve type should also match the application. Gate valves are generally selected for isolation, globe valves for isolation or regulation, and control valves where continuous flow regulation is required. Specialized designs such as Euro-Chlor or extended stem valves should be selected according to the specific process and installation conditions.