What Are Diaphragm Seals and Their Types?

• Threaded Diaphragm Seals:

These seals are mounted onto transmitters. gauges, or switches depending upon the application. They are joined through threaded connections or a flexible capillary. Threaded diaphragm seals have a compact design and can be fitted in small areas. Most manufacturers offer them with plenty of options such as changeable lower parts, cleaning rings, or various materials for wetted parts. The diaphragms may be welded internally or may be entirely made of stainless steel.

• Inline Diaphragm Seals:

These seals are placed internally using various types of connectors. Available in various sizes, they facilitate the laminar flow of fluids. Inline seals are placed in a manner that they prevent bacterial growth or other buildup in the diaphragm that may happen over a period of time. They also help eliminate errors that may occur while operating the diaphragm.

• Sanitary Diaphragm Seals:

These seals are used where a high amount of hygiene is required, such as food processing units or medical research labs. These diaphragm seals must comply with FDA requirements and Clean in place (CIP) methodologies. They help eliminate any risk of bacterial growth or contamination.

• Flanged Diaphragm Seals:

These seals are directly mounted onto gauges, transmitters, pipes, and so on. Depending upon the application and process fluids, various materials may be used for the diaphragm. Since this directly mountable, application compatibility is an important factor when selecting this type of seal.

• They help prevent clogging and crystallization of fluids.
• They eliminate the risk of corrosion or any kind of reaction of the fluids with these mostly metallic devices.
• They enable the instruments to function normally in a very wide temperature range and all kinds of toxic fluids and semisolids.
• Certain types of threaded and flanged diaphragm seals facilitate remote mounting via a capillary, depending upon the application requirement.
• They help increase the operational life of the enclosed instruments