A diaphragm seal with flange connection is used to protect pressure gauges from harsh process media.
It consists of a flexible diaphragm that isolates the measuring instrument from the fluid.
The flange connection ensures a strong, leak-proof attachment to pipelines or vessels.
It is commonly used in industries handling corrosive, viscous, or high-temperature fluids.
The diaphragm transmits pressure through a fill fluid to the pressure gauge.
This design prevents clogging or damage to the sensitive internal parts of the gauge.
Materials for diaphragms vary, including stainless steel, PTFE, or exotic alloys.
Flanged connections follow standard sizes like ANSI, DIN, or JIS specifications.
It improves measurement accuracy in challenging environments.
The system is ideal for sanitary applications such as food and pharmaceuticals.
It reduces maintenance needs by extending the life of the pressure gauge.
The assembly can withstand vibration and pressure fluctuations.
Installation is straightforward due to standardized flange mounting.
It is suitable for both low and high-pressure applications.
A diaphragm seal with a flange connection pressure gauge (e.g., WIKA 990.27 ) protects pressure instruments from aggressive, high-temperature, or viscous media, ensuring reliable measurement. It features a flush or internal metal diaphragm welded to a flange, using a filling fluid to transmit pressure. Common in chemical, petrochemical, and food industries, they are designed to handle demanding, , corrosive processes
Overall, it enhances safety, reliability, and performance in pressure measurement systems.
Connection Size diaphragm gauge
Connection Type Flanged
Diaphragm Material SS316L
Material Stainless Steel
Body Material SS316
Pressure Rating 40 bar
Fill Fluid Silicone Oil
Usage/Application Industrial
Color Black
Size 4“ & 6 “
Pressure Range: Vacuum up to high pressure (e.g., -1 to 600 bar or higher)
Flange Standard: ANSI, DIN, or JIS compatible
Diaphragm Material: Stainless steel (SS316L), Hastelloy, or PTFE-coated
Housing Material: Stainless steel or carbon steel
Fill Fluid: Silicone oil, glycerin, or food-grade fluid
Process Connection Size: Typically ½” to 4” flange sizes
Temperature Range: -40°C to +200°C (depends on fill fluid and materials)
Accuracy: ±1% to ±1.6% of full scale
Mounting Type: Direct mount or capillary type remote mounting
Application: Chemical, petrochemical, food, pharmaceutical, and wastewater industries
