Your Trusted Pressure Relief Valve Testing Provider
Micro Precision is a trusted pressure relief valve testing provider because its laboratories hold ISO/IEC 17025:2017 accreditation and issue NIST-traceable certificates of calibration for every valve serviced. Micro Precision’s ISO/IEC 17025:2017 accredited laboratories issue NIST-traceable certificates of calibration for pressure relief valves used across aerospace, defense, medical, automotive, and manufacturing industries, supported by a global network of more than 50 calibration laboratories.
Our metrologists work with a variety of pressure relief valve types and manufacturers, including spring-loaded and pilot-operated safety relief valves from brands such as Teledyne and Hydroseal. Quality managers rely on our documented traceability records for audit readiness, while procurement teams benefit from a single accredited vendor supporting pressure relief valve testing across multiple facility locations.
Why Pressure Relief Valve Testing Matters
Pressure relief valve testing matters because a valve that fails to open at its set pressure, or fails to reseat correctly, creates a direct safety hazard for personnel and equipment. Uncalibrated or untested relief valves can drift out of tolerance without producing any visible warning sign, which is why documented, standards-based testing is required rather than optional.
Testing practices connect directly to recognized inspection methods for pressure-relieving devices and pressure vessel-related interval requirements, alongside ANSI/NCSL Z540.3 for measurement traceability. Quality managers need a defensible audit trail linking every set pressure and reseat pressure reading back to a NIST-traceable standard, and compliance officers need documentation that satisfies ISO/IEC 17025:2017 and industry-specific regulatory reviews.
Ensure Accurate Pressure Relief Valve Testing
Ensuring accurate pressure relief valve testing means following a documented process from intake through return. Micro Precision receives each valve, inspects it for damage, gradually increases pressure using a NIST-traceable reference gauge until the valve reaches its set (popping) pressure, then slowly decreases pressure to record the reseat pressure, repeating the test for confirmation before issuing a full certificate of calibration.
Every test is performed under controlled conditions by trained metrologists, with results recorded for full traceability. Micro Precision offers standard turnaround as well as faster service options for pressure relief valves needed back in service quickly, without compromising the accuracy of the testing process.
Our Calibration Options
Micro Precision offers both in-lab and on-site pressure relief valve testing options to match your operational needs. In-lab testing ships your valve to one of our ISO/IEC 17025:2017 accredited laboratories for testing under fully controlled conditions. On-site testing sends a qualified technician to your facility, minimizing downtime for pressure relief valves that are difficult to remove from active service.
Faster turnaround options are available for time-sensitive testing needs, in addition to our standard service timeline. Whether testing a single pressure relief valve or an entire inventory, Micro Precision structures the service around your facility’s quality program and inspection schedule.
Pressure Relief Valves We Test
Micro Precision tests a variety of pressure relief valve types across spring-loaded and pilot-operated designs, including valves from leading manufacturers.
- Spring-loaded pressure relief valves
- Safety relief valves (PSVs)
- Pilot-operated relief valves
- Pressure relief valves in gas service
- Pressure relief valves in liquid service
- Backflow-related relief valves
Micro Precision tests valves from manufacturers including Teledyne and Hydroseal. If your specific pressure relief valve model is not listed, it is likely supported. Contact Micro Precision to confirm testing availability for your valve.
Calibration Service Levels Offered
Micro Precision offers three pressure relief valve testing service levels so quality managers and procurement teams can match documentation depth to program requirements.
| Type of Service | Traceable | Traceable with Data | Accredited (ISO:IEC 17025:2017, Z540.3) |
|---|---|---|---|
| Calibrated to manufacturers specifications traceable to SI Units | |||
| ISO 9000 Compliant | |||
| Calibration certificates, data, maintained on secure web based tool (CDM) | |||
| Detailed calibration certificates and calibration stickers | |||
| Instrument adjustment (if found out of tolerance) | |||
| ANSI/NCSL Z540-1 compliant | |||
| Calibration Data | |||
| Logo from Accreditation body, Expanded Measurement Uncertainty | |||
| ANSI/NCSL Z540.3 compliant |
Pressure Relief Valve Calibration Services
Micro Precision delivers ISO/IEC 17025:2017 accredited, NIST-traceable pressure relief valve testing services for spring-loaded and pilot-operated valves across a global network of more than 50 calibration laboratories. Quality managers, metrologists, and procurement teams rely on Micro Precision for documented traceability, in-lab and on-site service options, and a single accredited vendor for their entire pressure relief valve inventory. Request a calibration quote to get started.
Please complete our quick Pressure Relief Valve calibration & repair service request form, and a Micro Precision representative will reach out to you same-day during office hours, or within one business day after office hours. (Mon – Friday 8AM – 4PM PST)
Pressure Relief Valve Service
If you have any inquiries, or simply wish to connect with us, we'd love to hear from you! Please don't hesitate to reach out to us.
"*" indicates required fields
Frequently Asked Questions
Micro Precision tests a pressure relief valve by gradually increasing pressure until the valve reaches its set, or popping, pressure, then slowly decreasing pressure to record the reseat pressure. Testing is repeated multiple times using NIST-traceable reference gauges, and a certificate of calibration documenting the results is issued with every valve returned.
Pressure relief valve testing frequency is typically set using a risk-based approach consistent with API 576 guidance, which states devices should be inspected as often as necessary to maintain reliable operation rather than on a single fixed schedule. Micro Precision helps facilities document defensible testing intervals based on operating history and criticality.
Pressure relief valve testing verifies the popping and reseat pressure of an in-service safety device, while calibration in the broader sense refers to comparing and adjusting an instrument against a reference standard. Micro Precision uses NIST-traceable reference standards for both processes and documents results with a certificate of calibration.
Pressure relief valve inspection intervals are commonly guided by API RP 576 for inspection methods and API 510 for pressure vessel-related interval requirements. Micro Precision documents testing results to support facilities in meeting these industry recommended practices and internal quality programs.
Popping pressure is the pressure at which a pressure relief valve’s disc lifts off its seat and begins to release pressure, while reseat pressure is the lower pressure at which the valve disc returns to its seat and fully closes. Micro Precision records both values during every pressure relief valve test.
Micro Precision provides on-site pressure relief valve testing for facilities that cannot remove valves from active service, in addition to in-lab testing at its ISO/IEC 17025:2017 accredited laboratories. Both options include a NIST-traceable certificate of calibration documenting the results.
Testing a pressure relief valve requires a certified pressure reference gauge, a controlled pressure source, and a test setup capable of safely reaching the valve’s set pressure. Micro Precision’s ISO/IEC 17025:2017 accredited laboratories maintain this equipment for every pressure relief valve test performed.