Technical regulation and scope of the MSS SP-68 standard
This standard establishes strict operational and design requirements for industrial high-pressure butterfly valves. A key feature of valves covered by MSS SP-68 is the offset seat plane relative to the stem centerline (eccentric design), which ensures increased tightness and durability of sealing elements.
EV Group China experts emphasize that the provisions of this document apply to shut-off valves whose pressure and temperature parameters fully comply with ASME B16.34 specifications. The standard details:
- Methodology for conducting hydraulic and pneumatic strength and leak tests.
- Requirements for the design of body parts and disc assemblies.
- Mandatory product marking rules to ensure traceability under operating conditions.
- Nomenclature list of sizes and pressure classes.
The use of valves compliant with MSS SP-68 is critical for mission-critical pipeline systems where high reliability is required when working with aggressive or high-pressure media.