Metallic VSP ring, also called inner arc ring, very special ring, is made of carbon steel, stainless steel, titanium alloy, aluminum alloy, copper alloy and stainless steel materials. Metallic VSP rings has reasonable geometric symmetry, which the inner arc are folded evenly along the axial direction and replaced alternated arranged. This design contributes a continuous surface for extremely high voidage and evenly distribution.

Compared with pall ring, the fluxes are increased 15-30% and the pressure drop is reduced 20%–30%.

Material of metallic VSP ring
Carbon steel.
Aluminum alloy steel.
Titanium alloy steel.
Copper.
Stainless steel.
Features of metallic VSP ring
Reasonable geometric symmetry.
Increased 15%–30% flux.
Reduced 20%–30% pressure drop.
Evenly gas and liquid distribution.
High mass transfer performance.

Applications of metallic VSP ring

• Separation.
• Absorption.
• Desorption.
• Atmosphere-vacuum distillation.
• Decarburization of synthesis ammonia.
• Desulfuration of synthesis ammonia.
• Separation of ethyl benzene.
• Separation of isooctane.
• Separation of methylbenzene.

Table 1: Specification of Metallic VSP Ring

Item	Size (mm)	Bulk Density 304 (kg/m3)	Number (n/m3)	Surface Area (m2/m3)	Voidage	Dry Packing Factor (m-1)
01	25 × 0.3	209	52500	196	97.3%	212.2
02	25 × 0.4	290	52500	196	96.3%	219.2
03	38 × 0.4	198	15500	134	97.5%	144.9
04	38 × 0.6	308	15500	134	96.2%	151.3
05	50 × 0.5	192	6850	102	97.6%	110.1
06	50 × 0.6	234	6850	102	97.0%	111.8
07	50 × 0.8	315	6850	102	96.0%	115.5
08	76 × 0.6	151	1950	67	98.1%	71.3
09	76 × 0.8	206	1950	67	97.4%	72.9
10	76 × 1.0	261	1950	67	96.7%	74.4