VSP® Tower Packing

MACH Engineering’s VSP® arch ring is a type of tower packing formed from a single sheet of metal. Its unique spherical shape maximizes surface-area-to-void-space ratio while providing structural integrity and mechanical strength. The sizes of Arch Ring are proportional in all dimensions for accurate scale-up. The result is a unique packing material that delivers significant performance improvements over a standard pall ring design.

Use VSP® tower packing in a variety of industrial applications that require minimal pressure drop. For detailed specifications, contact MACH Engineering directly.

Product Overview
Nominal Size (in) 1 (25 mm) 1.6 (40 mm) 2 (50 mm)
Void Fraction (%) 98 98 98
Geometric Surface Area (ft2/ft3) 62.5 40.2 33.5
Weight – SS304 (lb/ft3) 11.2 10.6 11.86
Pcs/ft3 1458 382 190


MACH Engineering VSP® rings have a spherical shape that is proportional and symmetrical in all dimensions, allowing for accurate scale-up without the risk of nesting. They feature heavy ribs for added strength, making them suitable for use in high bed heights. A series of longitudinal perforations create tabs that fold inward — a unique design element that promotes the formation of small, trickle-down droplets that improve liquid-gas mixing and distribution.

Materials & Sizes

We manufacture our VSP® tower packing in 1″, 1 1/2″ and 2″ sizes, using the following materials:

  • VSP Tower Packing304 and 316 stainless steel
  • 304L and SS316L low-carbon stainless steel
  • Carbon steel
  • Aluminum
  • Titanium
  • Copper

For the best corrosion resistance, choose stainless steel, aluminum or titanium. For cost-effective strength in non-corrosive environments, choose carbon steel.

Not sure which metal is best for your application or budget? Contact MACH Engineering for advice from one of our experts.

Benefits and Applications

MACH Engineering VSP® ring packing offers several benefits, including:

  • A 15 to 30 percent improvement in flux compared to pall rings
  • A 20 to 30 percent reduction in pressure drop compared to pall rings
  • Even gas and liquid distribution
  • Large void space
  • High strength-to-weight ratio
  • High mass and heat transfer rates
  • High throughput capacity
  • High flooding point
  • Low wetting point

Clients typically use our VSP® arch ring packing in purification, washing or vacuum distillation towers — or any application involving materials that aggregate or decompose easily. Specific use cases include atmosphere-vacuum distillation, synthesis ammonia decarburization or desulfuration, and ethylbenzene, isooctane or methylbenzene separation.

Available From MACH Engineering

MACH Engineering is a dedicated expert in the field of industrial tower packing. We offer a wide range of packing products, from pall rings and Tri-Packs® to specialized products like our VSP® ring packing. We also provide engineering consulting services such as process simulation to help you determine the best packing for your needs.

Make us your source for VSP® ring packing in a variety of materials and sizes. Contact our head office by email or phone to learn how we can help.

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