Plastic Pall Ring - Different Diameters and Colors for Chemical Towers
Metal pall ring is an important type of pall ring. Compared with plastic pall ring, the metal pall ring has better corrosion and rust resistance to be used in the extremely harsh environments. Metal pall ring is mainly made of carbon steel, galvanized steel, stainless steel and other materials. Stainless steel pall ring is the most popular and widely used type because of the best corrosion resistance and chemical stability performance.
Similar to the ceramic pall ring, there are two layer of windows on the cylinder wall. And each layer has five ligules, which is punched and bending inward the axe of ring.
parameters of flame arrestor element, such as crimp height, thickness and diameter can be formulated.
PPR-01: Plastic pall ring can be made of different shapes for different application.
Plastic pall ring is more and more popular in the gas and liquid separator applications. The plastic pall ring has outstanding chemical resistance, temperature stability and mechanical strength. The plastic pall ring consists of polypropylene pall ring, polyethylene pall ring, RPP pall ring, PVDF pall ring, PVC and CPVC pall ring.
The structure of plastic pall ring is a bit different from the ceramic pall ring and metallic pall ring. For the metallic and ceramic pall ring, two layers of windows on the cylinder wall and ligules bending inward the axes of the ring on the cylinder wall. There are two layers of windows on the plastic cylinder wall and the fingers or webs bending inward of the ring and form different shapes.
At the same decompression situation, the handling capacity of pall ring is 50% more than the Raschig ring. Meanwhile, the mass pressure is half lower than the Raschig ring at the same treatment. Additional, transfer efficiency will improve about 20%.
Specifications of plastic pall ring
- Material: PE, PP, RPP, PVC, CPVC, PVDF.
- Diameter: 16 mm, 25 mm, 38 mm, 50 mm, 76 mm.
- Thickness: 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 2.6 mm.
Performance comparison of plastic pall ring
| Material |
PE |
PP |
RPP |
PVC |
CPVC |
PVDF |
Density
(g/cm3) |
0.94-0.96 |
0.89-0.91 |
0.93-0.94 |
1.32-1.44 |
1.50-1.54 |
1.75-1.78 |
Operation temperature
(°C) |
90 |
>100 |
>120 |
>60 |
>90 |
>150 |
| Chemical corrosion resistance |
Good |
Good |
Good |
Good |
Good |
Good |
Compression strength
(MPa) |
>6.0 |
>6.5 |
>7.0 |
>6.0 |
>8.0 |
>10.0 |
Technical Parameter of plastic pall ring
| Item |
Size
(D × T × H )
(mm) |
Bulk density
(kg/m3) |
Filling quantity |
Surface area
(m2/m3) |
Voidage
(%) |
| PRPT-01 |
16 × 1 × 16 |
141 |
230000 |
260 |
91 |
| PRPT-02 |
25 × 1.2 × 25 |
85 |
48300 |
213 |
91 |
| PRPT-03 |
38 × 1.4 × 38 |
82 |
15800 |
151 |
91 |
| PRPT-04 |
50 × 1.5 × 50 |
60 |
6300 |
100 |
92 |
| PRPT-05 |
76 × 2.6 × 76 |
62 |
1930 |
72 |
92 |
| Note: Special specifications can be customized according to your requirements. |
Features of plastic pall ring
- Large flux.
- Small resistance.
- High mechanical strength.
- High separation efficiency.
- High operational flexibility.
- High mechanical strength.
- Chemical resistance, such ca acid, alkali, salt.
- Temperature stability.
- Various inner shapes. Can suit different applications.
- Different colors. All the colors can be customized.
PPR-02: Plastic pall ring inner shape 01.
PPR-03: Plastic pall ring inner shape 02.
PPR-04: Plastic pall ring inner shape 03.
PPR-05: Plastic pall ring can be made into different colors.
Applications of plastic pall ring
- Plastic pall ring is widely used in the chemical towers because of the excellent chemical resistance performance.
- Because of the high separating efficiency, the plastic pall ring can be used in various applications, such as:
- CO2 absorption.
- SO2, HCL and HF absorption or stripping.
- Chlorine dioxide absorption in water or caustics.
- Chlorine absorption in water or caustics.
