Selecting the correct diaphragm seal size is crucial for compatibility and performance. PCI Instruments assists you in making the right choice by offering expert consultation, customisation options, and thorough compatibility checks. With the proper diaphragm seal size, you can safeguard instrument accuracy, extend equipment life, and minimise the risk of process disruptions.
Factors to Consider
- Process Connection Size: Match the seal size to your system’s connections (flange diameter or thread size).
- Pressure Range: Ensure the diaphragm can withstand the operational pressures.
- Temperature Conditions: Consider how temperature affects material selection and seal size.
- Media Compatibility: Choose materials that are compatible with the process media.
Expert Assistance
Our technical team provides:
- Consultation: Evaluating your specific requirements to recommend ideal seal dimensions.
- Customisation: Offering tailored solutions if standard sizes do not meet your needs.
- Compatibility Checks: Ensuring the seal fits your measuring instrument correctly to avoid leaks or inaccuracies.
For specialised needs, our bespoke diaphragm seal designs offer options beyond standard sizes. By combining the right materials and configurations, we help you achieve a reliable, long-term solution that matches your unique application demands.
| Industry | Typical Seal Sizes (DN/Inches) | Common Pressure Range | Key Notes |
|---|---|---|---|
| Food & Beverage | DN25–DN50 (1″–2″) | Up to 16 bar (230 psi) | – Typically 316L stainless steel – Smooth, crevice-free surfaces – FDA-/3-A-approved fill fluids |
| Pharmaceutical | DN25–DN40 (1″–1.5″) | Up to 10 bar (145 psi) | – High-purity materials (e.g., 316L, Hastelloy) – EHEDG/ASME BPE compliance – CIP/SIP compatibility |
| Chemical & Petrochemical | DN40–DN80 (1.5″–3″) | Up to 40 bar (580 psi) (Higher with specialty designs) |
– Corrosion-resistant alloys (Hastelloy, Monel) – Special fill fluids for high-temp or corrosive media – Bolted or all-welded designs |
| Oil & Gas | DN50–DN100 (2″–4″) | Up to 100 bar (1450 psi) (Higher for wellhead applications) |
– High-pressure seals with bolted construction – Fill fluids capable of extreme temperatures – Explosion-proof/ATEX certification |
| Power Generation | DN25–DN80 (1″–3″) | Up to 40 bar (580 psi) (Steam applications may exceed this) |
– High-temperature alloys (Tantalum, Hastelloy) – Steam-resistant fill fluids – Frequent calibration checks recommended |
Sources: Industry guidelines from EHEDG, 3-A Sanitary Standards, ASME BPE,
API specifications, manufacturer data sheets, and PCI Instruments internal research. Actual selection depends on specific application conditions, regulatory requirements, and environmental factors.
Importance of Proper Sizing
- Optimal Performance: Correct sizing ensures accurate pressure transmission and measurement.
- Safety: Prevents overloading of the diaphragm, reducing risk of failure or hazardous leaks.
- Equipment Longevity: Minimizes wear and tear on both the seal and the instrument itself.
In applications with high pressures, selecting chemical seals for high-pressure applications with appropriate sizing is essential for both safety and long-term performance. Meanwhile, proper sizing also facilitates seamless integration with pressure instruments, enhancing system efficiency and reducing the potential for measurement errors.
PCI Instruments offers a fit-and-fill service
to ensure your diaphragm seals are assembled and calibrated accurately for optimum results.
By selecting the right diaphragm seal size, you ensure optimal performance and longevity of your pressure measurement system. For guidance on choosing the appropriate dimensions, visit our commercial Diaphragm Seals. Whether your process involves extremely high pressures, stringent sanitation requirements, or corrosive materials, PCI Instruments has the expertise and resources to help you succeed.
