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Diaphragm Seals

33 items
1 - 9 of 33
981.27 In-Line Diaphragm Seal

981.27 In-Line Diaphragm Seal

1519

The WIKA 981.27 In-Line Diaphragm Seal is made for direct installation between two flanges and gives its user a wide choice of unique materials to choose. Applications: For direct, permanent installation in pipelines For flowing, pure and aggressive media Chemical process industry Petrochemical industry
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990.10 Threaded Connection Diaphragm Seal

990.10 Threaded Connection Diaphragm Seal

1522

The WIKA 990.10 diaphragm seal with threaded connection in threaded design is suitable for versatile application areas. A replacement of the lower body is possible without modifications on the diaphragm seal system. With this diaphragm seal, high pressure ranges up to 250 bar can be covered. Compared to the WIKA 990.40 diaphragm seal, higher pressure ranges can be covered (smaller diameter of the diaphragm). Mounting of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary. For the material selection, WIKA offers a variety of solutions, in which the upper body of the diaphragm seal and the wetted parts can be made of identical or different materials. The wetted parts can, as an alternative, be coated.    
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990.50 Sterile Connection Diaphragm Seal

990.50 Sterile Connection Diaphragm Seal

1525

The WIKA 990.50 NEUMO BioConnect® diaphragm seal is ideally suited to fulfil the high standard requirements of sanitary applications. It can be optimally integrated into pipelines via the BioConnect® fittings, meets all hygienic design requirements and is EHEDG certified. The diaphragm seal systems can withstand the cleaning vapour temperatures occurring in the SIP processes and thus ensure a sterile connection between the medium to be measured and the diaphragm seal. Assembly of the diaphragm seal and measuring instrument is made via a direct assembly as standard or optionally via a cooling element or a flexible capillary. For the material selection, WIKA offers a variety of solutions, in which the upper body and the diaphragm are made of identical materials. Stainless steel 316L (1.4435) is used as standard material. Other special materials are available on request. Measuring systems with the WIKA 990.50 WIKA diaphragm seal are successfully used in the life science industry, in pharmaceutical and biotechnology applications.
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990.36 Threaded Process Connection Diaphragm Seals

990.36 Threaded Process Connection Diaphragm Seals

2246

The WIKA 990.36 small diaphragm seal with threaded connection and flush diaphragm is suitable for versatile applications. This diaphragm seal, despite its compact dimensions, can also be used for high pressures. Optionally, there are versions available in hygienic design or with protective plates. Mounting of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary. For the material selection, WIKA offers a variety of solutions, in which the diaphragm seal and the wetted parts can be made of identical or different materials. The wetted parts can, as an alternative, be coated.
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990.40 Threaded Connection Diaphragm Seal

990.40 Threaded Connection Diaphragm Seal

2249

The WIKA 990.40 diaphragm seal with threaded connection in threaded design is suitable for versatile application areas. A replacement of the lower body is possible without modifications on the diaphragm seal system. With this diaphragm seal, low-pressure ranges can be covered ” the large diameter of the diaphragm affects a lower deviation at the measuring instrument when the temperature changes. Mounting of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary. For the material selection, WIKA offers a variety of solutions, in which the upper body of the diaphragm seal and the wetted parts can be made of identical or different materials. The wetted parts can, as an alternative, be coated.
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970.1x Diaphragm Probe Seals

970.1x Diaphragm Probe Seals

2252

The WIKA diaphragm probe seals are available in three different models: 970.10, 970.11, 970.12 All models are available in male thread or male running nut or female union nut. Ask our product specialist for more advanced or personalised information, or see downloads.
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990.27 Flanged Connection Diaphragm Seal

990.27 Flanged Connection Diaphragm Seal

2255

Due to its design, the WIKA 990.27 diaphragm seal with flange connection and a flush diaphragm is suitable for all currently used standard flanges and is mounted for pressure measurement instead of a blind flange. Assembly of the diaphragm seal and measuring instrument is made via a direct assembly as standard or optionally via a cooling element or a flexible capillary. For the material selection, WIKA offers a variety of solutions, in which the upper part and the diaphragm can be made of identical or different materials. The diaphragm and the sealing face can also be offered coated or covered with foils. Measuring systems with model 990.27 WIKA diaphragm seals are successfully used worldwide in the chemical process and petrochemical industries with high measuring requirements.
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990.28 Flanged Process Connection Diaphragm Seal

990.28 Flanged Process Connection Diaphragm Seal

2258

The WIKA 990.28 flanged process connection diaphragm seal is a diaphragm seal with a flanged process connection. Ask our product specialist for more advanced or personalised information, or see downloads. Applications Chemical process industry Petrochemical industry Suitable for corrosive, highly viscous, crystallising or hot pressure media High-pressure applications
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990.26 Flanged Process Connection Diaphragm Seal

990.26 Flanged Process Connection Diaphragm Seal

2261

The WIKA 990.26 diaphragm seal is ideally suited for applications with small process connections. Due to the internal diaphragm, low measuring ranges can be realised ” the large diameter of the diaphragm affects a lower deviation at the measuring instrument when the temperature changes. Mounting of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary. For the material selection, WIKA offers a variety of solutions, in which the upper body of the diaphragm seal and the wetted parts can be made of identical or different materials. The wetted parts can, as an alternative, be coated. Applications Chemical process industry Petrochemical industry Suitable for corrosive, highly viscous, crystallising or hot pressure media For small flanged process connections
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1 - 9 of 33
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Diaphragm seals for pressure measurement in demanding process conditions

 

Diaphragm seals are used to ensure accurate and reliable pressure measurement when process conditions exceed the limits of standard measuring instruments. By connecting a pressure gauge, pressure transmitter, or pressure switch via a diaphragm seal, complex measurement requirements can be handled safely and effectively.

 

A diaphragm seal, also known as a chemical seal, separates the process medium from the measuring instrument using a diaphragm made from an application specific material. This construction protects the instrument while allowing precise pressure transmission, making diaphragm seals an essential component within pressure measurement and process instrumentation systems.

 

Diaphragm seals are widely applied in processes involving extreme temperatures, temperature fluctuations, aggressive or corrosive media, and highly viscous, heterogeneous, or crystallizing substances. They are also used where pressure and temperature measurement must be combined into a single measuring point or where an additional safety barrier is required for toxic or explosive media.

 

In hygienic and sterile applications such as food, pharmaceutical, and sanitary processing, diaphragm seals provide a clean and contamination free interface between the process and the measuring instrument. This supports compliance with strict hygiene standards while maintaining measurement accuracy.

 

Vytl Controls supplies diaphragm seal solutions that integrate seamlessly with pressure measurement and process instrumentation setups. Our portfolio is designed to support long term reliability, process safety, and consistent performance across industrial, marine, and offshore applications.

 

Protect pressure instruments from corrosive, viscous or abrasive process media while maintaining measurement accuracy and extending product life with diaphragm seals from W&O, a Vytl Controls company. We offer a wide range of options, including flanged connections, in-line, sterile process connection and threaded connection diaphragm seals. Browse our line-up today!