ITIS | Design Validation Testing

Recently several Control Seal Rising Stem Ball Valves (RSBV) were successfully tested according to the most strict requirements regarding DVT (Design Validation Testing) or TAT (Type Approval Test), specified in Shell MESC SPE 77/300, Appendix C for an end user located in Middle East.

The MESC SPE 77/300 Appendix C specifies DVT testing parameters and is a testing method to confirm the seat sealing, fugitive emission and operational torque capabilities of a valve when subjected to its rated design conditions, during and after it must undergo a series of mechanical and thermal cycles.

Appendix C is the only valve test procedure which requires testing at RT (room temperature), upper design temperature, lower design temperature, finally again at RT and a stripdown after testing for examination of the parts.

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