DECISION PROCESS
Engineering selection logic
Begin with the user requirement specification and the plant connection standard. Clamp, threaded, flange and proprietary hygienic interfaces are not interchangeable simply because their nominal sizes look similar. Identify the exact mating ferrule or socket, gasket material, sealing geometry, pressure rating and installation orientation. The assembly should avoid an undocumented recess or cavity, but cleanability can only be assessed from the selected connection drawing and the plant cleaning procedure.
Process and cleaning conditions may be more demanding than the normal measurement point. Record product temperature, cleaning chemistry, concentration, duration, sterilisation temperature, pressure, vacuum and thermal cycling. Consider whether a diaphragm seal or fill fluid is exposed to rapid temperature change and whether the medium can coat, crystallise or damage a seal. Material compatibility and surface-finish values require current evidence for the proposed wetted parts; they should not be inferred from marketing terms.
Finally state the documentation needed for design review, validation and receiving inspection. Examples may include dimensional drawings, material declarations, surface-finish records, elastomer information, calibration documents or a specific approval where applicable. Request only documents relevant to the project and verify that their scope includes the selected model and connection. The website does not treat a hygienic label as proof of a certificate or universal food/pharmaceutical suitability.
Selection factors
- Process connection
- Specify the exact standard, nominal size, mating geometry, seal type, installation orientation and pressure-temperature envelope.
- Wetted surfaces and seals
- Define required materials, surface condition, diaphragm arrangement, elastomer restrictions and traceability needs.
- Cleaning and sterilisation
- Provide chemicals, concentration, cycle temperature, pressure, duration, rinse conditions and expected thermal transitions.
- Measurement duty
- State pressure reference, minimum and maximum pressure, vacuum, mounting elevation, medium behaviour and required response.
- Evidence package
- List drawings, material, surface, calibration or approval documents required and verify their scope for the selected SKU.
Suitable scenarios for evaluation
- Food or beverage process equipment where the plant connection, cleaning cycle and wetted-material requirements are formally specified.
- Pharmaceutical or biotechnology utility and process skids subject to project-specific design review and documentation control.
- Viscous or coating media where a reviewed flush connection can reduce an exposed pressure passage without implying self-cleaning performance.
Limitations and confirmation points
- A flush diaphragm or sanitary-looking connection does not prove cleanability, drainability, approval status or suitability for a named process.
- Certificate, surface-finish, elastomer and material-traceability statements require documents whose scope matches the ordered configuration.
RFQ INPUTS
Information to send for configuration review
- Pressure reference and operating range
- Product medium and concentration
- Exact hygienic connection standard and size
- Wetted material and surface requirements
- Gasket or elastomer restrictions
- Cleaning and sterilisation cycle details
- Process and ambient temperature
- Installation orientation and drainability constraints
- Output, power and cable entry
- Required drawings, declarations, certificates and quantity
Request configuration-specific selection support View Industrial Pressure Transmitters
ENGINEERING FAQ
Frequently asked questions
Does a flush diaphragm automatically make a transmitter hygienic?
No. A flush diaphragm can reduce an exposed pressure passage, but hygienic suitability also depends on the complete connection geometry, gasket, wetted materials, surface condition, installation orientation, drainability and cleaning procedure. The mating process connection matters as much as the instrument side. Review a dimensioned drawing and the facility requirement specification, then request the relevant material, surface or approval evidence for the exact model and connection before treating it as a hygienic assembly.
Which cleaning data should be included in an RFQ?
List each cleaning or sterilisation method, chemical, concentration, maximum temperature and pressure, cycle duration, rinse condition and frequency. Include vacuum and the fastest heating or cooling transition if relevant. State whether the instrument remains installed and powered throughout the cycle. These conditions support a review of wetted materials, seals, fill system and thermal effects. Final acceptance should reference the selected configuration and controlled documents, not a general product-family description.
What documents may be needed for a hygienic project?
The project may request connection drawings, wetted-material declarations, surface-finish evidence, elastomer information, calibration records or an applicable certificate. The correct list depends on the facility standard and intended use; more paperwork is not automatically better evidence. Name each required document in the RFQ and verify the legal entity, model, connection, material, scope and validity where relevant. Do not assume that a document for another variant covers the ordered SKU.