ST-4™ Stacked Disc Anti Cavitation Trim

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ST-4 Stacked Disc trim is a powerful solution designed to tackle the most severe pressure drops while reducing sound levels and eliminating the effects of cavitation. It can be used in liquid, gas, or dual-phase service. The ST-4 design consists of individual discs machined with concentric channels machined to create a tortuous path and stacked to create a compact cylinder. The cylinder is then clamped into the body cavity of an OpGL globe valve and doubles as a seat retainer.

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Flow in this case is under the plug and as the fluid travels from the interior of the cylinder through either jagged grooves, through whcih it is forced to make a series of 45-degree dives and ascents, or through 90-degree labyrinthine turns. Simultaneously, the size of the channels increases allowing for expansion and thus reducing the pressure in stages.

  • Tolerates Sigma as low as 1.001
  • Can be characterized
  • Noise abatement of up to 30dBA
  • Custom-engineered for optimization and characterization of flow according to application requirements – including dirty service
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