Re-certification of pressure relief- and safety valves is mandatory. To support this process, in-situ testing can add significant value to risk-based assessments and complement traditional bench testing. With an Auxiliary Lift Assist Device (ALAD), testing spring-operated Pressure Relief Valves (PRVs) becomes simpler, smarter, and more efficient. The key advantage: PRVs can be functionally tested in situ, as long as the procedure is carried out correctly and with the appropriate equipment. For optimal results, the PREVENTEST NEXUS is considered the best choice for performing ALAD tests, ensuring precision, safety and compliance with industry standards.