Description
The Diaphragm Sealed Pressure Gauge from Aavad Instrument Pvt. Ltd. is a precision instrument designed for measuring pressure of viscous, slurry, corrosive, crystallizing, or media that can clog standard Bourdon tube gauges. The flexible diaphragm — available in SS 316L, Hastelloy C, PTFE-lined, or Inconel — separates the process media from the internal gauge mechanism, protecting it from direct contact with aggressive or contaminating fluids.
Diaphragm Seals, also known as Chemical Seals or Gauge Isolators, are used to isolate pressure instrumentation, like pressure gauges, pressure transmitters, pressure switches, level transmitters, and more from process media that is hot, corrosive, clogging, or otherwise damaging to the pressure instrument.
Key Features
- Diaphragm Materials: SS 316L, Hastelloy C-276, PTFE-lined SS, Inconel, Monel — chosen per media compatibility
- Fill Fluid: Glycerine, silicone oil, food-grade oil (FDA-compliant), or high-temperature oil
- Dial Size: 100 mm, 150 mm standard; custom sizes available
- Pressure Range: 0–25 mbar up to 0–600 bar
- Connection Types: Flush, wafer, flanged (DIN/ANSI), extended neck, inline (I-section)
- Accuracy: ±1.0% to ±1.6% FSD depending on configuration
- Process Connection Flanges: DIN 2501, ANSI B16.5 PN10/16/25/40 available
- Body & Wetted Parts: All SS 316 / SS 316L for corrosive media resistance
- Temperature Range: -40°C to +200°C (process), with high-temp fill fluid options
- Optional capillary extensions up to 5 m for remote sensing
- ATEX-certified versions available for hazardous area use
- Syphon, pulsation damper, and shut-off valve accessories available
- NABL-accredited calibration and MTC on request
- Compliant with EN 837-3 and ASME B40.100 standards
Applications
- Pharmaceutical and biotech processes — sterile, WFI, and CIP systems
- Food, dairy, and beverage processing lines requiring hygienic seals
- Chemical plants handling acids, alkalis, solvents, and corrosive slurries
- Pulp and paper industry with fibrous and abrasive media
- Wastewater and sewage treatment with sludge and slurry measurement
- Fertilizer and pesticide manufacturing
- Paint, adhesive, and resin production with viscous fluids
- Offshore oil & gas platforms with seawater and crude media
- Chlorine, bromine, and halogen gas handling
- High-pressure hydraulic systems with emulsified or synthetic fluids
Datasheet
FAQs
1. What is a Diaphragm Sealed Pressure Gauge?
A Diaphragm Sealed Pressure Gauge is a mechanical pressure measuring instrument that uses a flexible diaphragm seal to isolate the gauge mechanism from corrosive, viscous, abrasive, crystallizing, or hygienic process media. The diaphragm transmits the process pressure through a fill fluid to the gauge, providing accurate pressure measurement while protecting the internal sensing mechanism.
2. Why is a Diaphragm Seal used?
A diaphragm seal protects the pressure gauge from clogging, corrosion, contamination, crystallization, high-viscosity fluids, and aggressive chemicals. This significantly improves measurement reliability, service life, and maintenance intervals, making diaphragm sealed gauges ideal for demanding industrial process applications.
3. What Diaphragm Materials are available?
Aavad Instrument Pvt. Ltd. manufactures Diaphragm Sealed Pressure Gauges with diaphragm materials including SS316L Stainless Steel, PTFE-lined Stainless Steel, Hastelloy C, and Inconel. Material selection depends on the process media, operating temperature, pressure, corrosion resistance requirements, and specific industrial application.
