Diaphragm Seals

Diaphragm seals isolate instruments from harsh or corrosive media, ensuring accurate, reliable pressure measurement and protection in industrial processes.

Flanged Diaphragm Seals
Isolate instruments from harsh process media.
Flanged Diaphragm Seals
In-Line Diaphragm Seals
Protect instruments from corrosive, viscous media.
In-Line Diaphragm Seals
Sterile Diaphragm Seals
Ensure hygienic, contamination-free pressure measurement.
Sterile Diaphragm Seals
Threaded Diaphragm Seals
Secure instrument protection in threaded process setups.
Threaded Diaphragm Seals
Parts & Accessories
Parts & Accessories
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Model 990.28 Flanged Process Connection Diaphragm Seal
WIKA
Model 990.28.png
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Diaphragm In-Line Seals - 981.27
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Wika Diaphragm In-Line Seal, Model 981.27
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Diaphragm In-Line Seals - 981.10
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Wika Diaphragm In-Line Seal, Model 981.10
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Model 990.34 Threaded Process Connection Diaphragm Seal
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Model 990.34.png
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Model 990.15 Flanged Process Connection Diaphragm Seal
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WIKA Flanged Process Connection Diaphragm Seal, Model 990.15
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Model 981.18, 981.19, 981.20, 981.21 In Line Diaphragm Seal with Sterile Connection
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WIKA In Line Diaphragm Seal with Sterile Connection, Model 981.18, 981.19, 981.20, 981.21
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Model 990.41 Diaphragm Seal with Flange Connection
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Model 990.41.png
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Model 990.51 Diaphragm Seal with Sterile Connection
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Model 990.51.png
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Model 990.18, 990.19, 990.20, 990.21 Diaphragm Seal with Sterile Connection
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WIKA Diaphragm Seal with Sterile Connection, Model 990.18, 990.19, 990.20, 990.21
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Model 990.30 Diaphragm Seal with Sterile Connection
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WIKA Diaphragm Seal with Sterile Connection, Model 990.30.png
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Model 990.26 Flanged Process Connection Diaphragm Seal
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PIC_PR_990_26_de_de_47990.jpg.png
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Model 990.17 Diaphragm Seal with Sterile Connection
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WIKA Diaphragm Seal with Sterile Connection, Model 990.17
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Model 990.31 Threaded Process Connection Diaphragm Seal
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Model 990.23 Diaphragm Seal
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PIC_PR_990_23_de_de_47988.jpg.png
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Model 990.10 Diaphragm Seal with Threaded Connection
WIKA
PIC_PR_L990_10_en_us_64507.jpg.png
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Model 910.19, 910.20, 910.23 Accessory for Diaphragm Seal
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PIC_PR_910_19_910_20_910_23_de_de_47931.jpg.png
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Model 990.29 Diaphragm Seal with Flange Connection
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Model 990.29.png
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Sterile Connection, Diaphragm In-Line Seals - 981.50
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Wika Sterile Connection, Model 981.50
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Model 990.27 Diaphragm Seal with Flange Connection
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PIC_PR_990_27_de_de_47991.jpg.png
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Model 990.35 Flanged Process Connection Diaphragm Seal
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Model 990.35.png
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Model 990.40 Threaded Connection Diaphragm Seal
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Model 990.40.png
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Model 990.36 Threaded Process Connection Small Diaphragm Seal
WIKA
Model 990.36.png
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Model 990.24 Sterile Process Connection Diaphragm Seal
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PIC_PR_990_24_de_de_47989.jpg.png
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Model 910.27 Diaphragm Seal Accessories
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WIKA Diaphragm Seal Accessorie, Model 910.27
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Model DSS22P Pressure Gauge in Hygienic Design with Mounted Diaphragm Seal
WIKA
dss22p_en_co_rs_w700_h700_image.png
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Model 990.12 Flanged Process Connection Diaphragm Seal
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WIKA Flanged Process Connection Diaphragm Seal, Model 990.12
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Model 981.22, 981.52, 981.53 In Line Diaphragm Seal with Sterile Connection
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WIKA In Line Diaphragm Seal with Sterile Connection, Model 981.22, 981.52, 981.53
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Model 981.51 In-Line Diaphragm Seal with Sterile Connection
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WIKA In Line Diaphragm Seal with Sterile Connection, Model 981.51
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Model 990.60 Sterile Connection Diaphragm Seal
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WIKA Sterile Connection Diaphragm Seal, Model 990.60
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Sterile Process Connection, Diaphragm In-Line Seal - 983
WIKA
Wika Sterile Process Connection, Model 983
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Diaphragm Seals

Diaphragm seals are protective devices used to isolate sensitive pressure measurement instruments from harsh process fluids and challenging environmental conditions. Comprising a flexible diaphragm secured between two rigid housing components, these seals transmit pressure from the process medium to the instrument through a stable, inert fill fluid, ensuring accurate pressure readings without direct contact between the instrument and the aggressive or hazardous media.

Diaphragm seals prevent contamination, corrosion, clogging, or damage to sensitive instruments caused by abrasive, corrosive, viscous, or toxic process fluids. By isolating measurement devices from direct media contact, diaphragm seals significantly extend instrument lifespan, enhance reliability, reduce maintenance costs, and maintain measurement accuracy and safety, thereby minimizing downtime and potential risks associated with process leaks or equipment failure.

Diaphragm seals are used in the chemical processing, oil and gas, pharmaceuticals, food and beverage production, pulp and paper, water treatment, power generation, mining, and petrochemical sectors. Their robust design and compatibility with numerous materials make them essential for accurate and reliable pressure measurement in challenging industrial environments.

Applications encompass protecting pressure gauges, transmitters, and switches in corrosive chemical reactors, sanitary food processing lines, slurry handling systems, high-temperature processes, and hazardous material storage. By providing an effective barrier, diaphragm seals enhance instrumentation performance and overall process safety.