What does the MAST value of a valve stem refer to? Are there any relevant standards or materials?
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This post was last edited by momofeichen on 2023-2-23 at 14:08. Upon seeing the MAST value for the valve stem, I searched for information on it but found no relevant details; I only came across a sentence in an online valve description that read, “– Valve stem design: A stronger valve stem results in a higher MAST value, without affecting the braking torque.” ” Does anyone know?
The MAST value (Mechanical Lift Performance Test) is an indicator used to evaluate the structural characteristics of the valve stem. It can measure geometric mechanical parameters such as flexibility, multi-directional bending, torque distribution, and seismic performance. The MAST value mainly depends on the valve stem size and material, and is usually provided by manufacturers of valves, pistons, and sealing components. Relevant standards or materials can refer to the API 594 design standard, as well as industry websites such as VALVE Magazine and Valve-pedia. -For reference only
MAST: Maximum Allowable Stem Torque/Thrust – the maximum shear torque or shear force that the valve stem can withstand. The higher the MAST value, the greater the torque that can be transmitted by the valve stem