SepraSol™ Double Open-Ended Liquid/Gas Coalescer product photo Primary L

SepraSol™ Double Open-Ended Liquid/Gas Coalescer

The Answer to Gas Filtration Applications

Clean, aerosol free gas is critical to equipment reliability and the economic efficiency of gas processing, petroleum refining and chemical
processing. Pall’s SepraSol™ double open-ended liquid/gas coalescer contains a patented hydrophobic/oleophobic treatment. This treatment provides maximum liquid and solid removal efficiency at a low saturated pressure drop to reduce the maintenance and operating costs associated with the use of contaminated gas.

The SepraSol double open-ended coalescer is recommended for applications at a pressure of 250 psig or greater. Some of the applications recommended for the double open-ended coalescer include:

  • Protecting compressors and turbines
  • Protecting combustion equipment, including low and ultra-low NOx burners by
  • Removing lubrication oil, water, compressor wear products, corrosion products, and other dirt from effluent gas streams
  • Minimizing solution losses downstream of gas purification process units
  • Protecting gas flow meters and meter runs, ensuring accurate flow rate measurements
  • Controlling injection well plugging during gas flooding
  • Minimizing foaming in amine and glycol contacting towers
  • Protecting catalysts, desiccants and absorbants
  • Safeguarding gas separation membrane systems
  • Preventing contamination of bioreactors
  • Ensuring contaminant-free carbonated beverages and containers


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Description
The Answer to Gas Filtration Applications

Clean, aerosol free gas is critical to equipment reliability and the economic efficiency of gas processing, petroleum refining and chemical
processing. Pall’s SepraSol™ double open-ended liquid/gas coalescer contains a patented hydrophobic/oleophobic treatment. This treatment provides maximum liquid and solid removal efficiency at a low saturated pressure drop to reduce the maintenance and operating costs associated with the use of contaminated gas.

The SepraSol double open-ended coalescer is recommended for applications at a pressure of 250 psig or greater. Some of the applications recommended for the double open-ended coalescer include:

  • Protecting compressors and turbines
  • Protecting combustion equipment, including low and ultra-low NOx burners by
  • Removing lubrication oil, water, compressor wear products, corrosion products, and other dirt from effluent gas streams
  • Minimizing solution losses downstream of gas purification process units
  • Protecting gas flow meters and meter runs, ensuring accurate flow rate measurements
  • Controlling injection well plugging during gas flooding
  • Minimizing foaming in amine and glycol contacting towers
  • Protecting catalysts, desiccants and absorbants
  • Safeguarding gas separation membrane systems
  • Preventing contamination of bioreactors
  • Ensuring contaminant-free carbonated beverages and containers
Specifications
Coalescer Technical Information

Oleophobic/Hydrophobic Treatment - All of Pall's SepraSol liquid/gas coalescers receive a patented oleophobic/hydrophobic treatment. Chemically treating the coalescer lowers the surface energy of the medium and promotes rapid drainage of the coalesced liquids. This significantly increases the amount of liquid per unit area of medium the coalescer can handle. Added benefits to the chemical treatment include lower saturated pressure drop, which saves operating costs and rapid recovery from liquid slugs.

Features, Advantages and Benefits of the Pall SepraSol Double Open-Ended Liquid/Gas Coalescer

Pall’s SepraSol liquid/gas coalescers eliminate virtually all solids and liquids in a gas stream. Downstream liquid levels are as low as 0.003 ppmw1 and solids removal rating is 0.3 micron (µm) (99.99% efficiency).2

 

 
FeaturesAdvantagesBenefits
     
Patented Oleophobic/ Hydrophobic Media Treatment
  • More rapidliquid drainage.
  • Lower saturated pressure drop.
  • Quicker recovery from liquid slugs.
  • Minimized vessel diameter due to less restrictions on annular velocity.
  • Reduced capital and operating cost.
  • Improved product quality and consistency.
     
High Effective Filtration Area
  • Fewer element changeouts needed.
  • High solids removal efficiency.
  • Lower operating and maintenance costs.
     
High Efficiency Media and Draining Materials
  • Consistently high liquid removal efficiency.
  • Reduced liquid losses.
  • Optimum protection of downstream equipment.
  • Lower maintenance costs and improved availability.
 

1 Test conditions used to measure efficiency area as follows:
Flow rate: 900 SCF/minute per 30 in. element at 37.8°C (100°F) and 6.9 bar (100 psig)
Liquid inlet: 50 ppmw oil

2 Per sodium chloride test


Additional Features of the Pall SepraSol Double Open-Ended Liquid/Gas Coalescing Filter



Performance
Performance Specifications
Solid Removal Rating  0.3 µm (99.99%) 
Temperature Rating  180°F (82°C)
150°F (65°C) with Water 
Clean & Saturated
Pressure Drop 
Sized to your specification


Figure 1: Effect of Pressure Drop on Compressor Operating Costs3

3 Conditions: Delta P on inlet pressure
Inlet Pressure = 20 psia
Outlet Pressure = 200 psia
Gas compressed is methane
Costs based on $0.07 / kwhr

Pall Corporation applies a patented oleophobic/hydrophobic chemical treatment on all of its SepraSol liquid/gas coalescers. This allows the coalescers to operate at a lower saturated pressure drop. As shown on Figure 1, a small difference in saturated pressure drop can result in significant savings in operating costs.

About Coalescer Efficiency Ratings
The measurement of the efficiency and the pressure drop of a coalescer should reflect operating conditions. Many manufacturers of coalescers measure efficiency using the dioctyl phthalate (DOP) test. The DOP test was not originally designed to measure the performance of a coalescer under operating conditions seen in the oil and gas industry. Rather, the DOP test is performed under the following conditions:

  • Measures only capture efficiency and does not indicate how much liquid is at the filter outlet. It is the outlet concentration, which will indicate whether downstream equipment and processes are vulnerable to damage.
  • Measures only the percent removal of DOP aerosols that are 0.3 µm compared to a range of sizes normally seen in oil and gas applications.
  • Measures the removal of DOP, a liquid not typically found in oil and gas applications.
  • Performed under a vacuum, not typical of operating conditions.
  • Performed on a dry coalescing element; the effectiveness of a coalescer should be measured when a coalescer is completely saturated.

Pall has developed a test called the Liquid Aerosol Separation Efficiency (LASE). Test to specially measure the performance of a coalescer under operating conditions. The table below compares the LASE and DOP test. For further details on the LASE test, see Pall literature GAS-4300b, “Recent Developments in Performance Ratings of Gas/Liquid Coalescers.”


Pall LASE Test vs. Conventional DOP

 
Pall LASE TestDOP TestLASE Advantage
       
Efficiency Rating

Measures ppmw of total downstream aerosol concentration

Measures only the capture efficiency of 0.3 µm DOP aerosols Specifies performance
based on total liquid
removal
       
Test Contaminant Polydispersed 20 wt. compressor lube oil (size range 0.1-1.0 µm) Monodispersed dioctyl
phthalate (size range at
0.3 µm only)
Closely simulates actual process contamination
       
Downstream Contaminant
Measurement
Full flow membrane sampling of all size contaminants Indirect light scattering of
0.3 µm contaminants
Directly measures the amount of all liquid downstream
       
Pressure Conditions Performed under positive pressure conditions  Performed under vacuum More closely reflects
actual process pressure
       
Cartridge Condition Performed on a saturated
cartridge
Performed on dry cartridge Reflects actual process
cartridge service
       
Pressure Drop Measurement Measures operating saturated cartridge pressure drop Measures dry cartridge
pressure drop
Provides a more realistic service pressure drop
 
Type
Coalescers
Use
Coalescing, Separation
Ordering Information
Nominal Cartridge Dimensions
 
Part
Number
Outer Diameter
(mm/in)
Length
(mm/in)
Surface Area
(m2/ft2)
       
CC3LG02H13 70/2.75 762/30 0.88/9.5
 
Application
Midstream Mol-sieve Dehydration, Refinery Amine Systems, Refinery Molecular Sieve Drier, LNG Stabilization Column , Midstream Acid Gas, Midstream Gas Pipeline Compressors, Midstream Glycol Filtration, Midstream Merc Rem Unit (MRU), LNG Acid Gas, LNG Other, Midstream Black Powder