Plastic tri-pack
is a type of random tower packing, which has hollow, spherical structure. Plastic tri-pack has a symmetrical geometry, which is made from a unique network of ribs, struts and drip rods. It is made of injection molded plastic, including PP, PE, PVC, PVDF and other materials. The most widely used diameter of plastic tri-pack is 1″, 1-1/4″, 3″ and 3-1/2″.

Available materials

Polypropylene (PP).
Polyethylene (PE).
Polyvinyl chloride (PVC).
Chlorinate polyvinyl chloride (CPVC).
Polyvinylidene Fluoride (PVDF).
Reinforced Polypropylene (RPP).

Table 1: The Specification of Plastic Tri-Pack

Item	Size (mm)	Surface Area (m2/m3)	Voidage	Bulk Number (n/m3)	Bulk Density (kg/m3)	Dry Packing Factor (m-1)
01	25	85	90%	81200	81	28
02	32	70	92%	25000	70	25
03	50	48	93%	11500	62	16
04	95	38	95%	1800	45	12

Table 2: Physical & Chemical Properties of Different Materials of Plastic Tri-Pack

Material/Performance	Density (After Injection Molding) (g/cm3)	Operation Temperature (°C)	Chemical Corrosion Resistance	Compression Strength (MPa)
PE	0.98	90	good	>6.0
PP	0.96	>100	good	>6.0
RPP	1.2	>120	good	>6.0
PVC	1.7	>60	good	>6.0
CPVC	1.8	>90	good	>6.0
PVDF	1.8	>150	good	>6.0

Features of plastic tri-pack

• High mass transfer efficiency.
• Evenly gas and liquid distribution.
• High surface area.
• Extremely low pressure drop.
• Temperature and chemical resistance.

Applications of plastic tri-pack

• Gas absorption and purification.
• Gas & liquid separation.
• Liquid extraction.
• Water treatment.
• Biological filtration.