PhaseSep® HE Series Liquid/Liquid Coalescers product photo Primary L

PhaseSep® HE Series Liquid/Liquid Coalescers

For the Most Difficult Emulsions
Pall’s PhaseSep HE Series Coalescer is a high efficiency separation cartridge that is designed to handle the toughest emulsions. Constructed with a fluoropolymer medium, Pall PhaseSep HE Series Coalescers can be used in a wide range of liquid / liquid separations in the refinery, chemical, flavor & fragrance, and biotechnology industries. The Pall PhaseSep HE Coalescer should be used for difficult emulsions where improved performance is required.

Performance of PhaseSep

HE Series Coalescers:
  • Removes sodium down to ≤  1 ppmw in cumene hydroperoxide
  • Decreases sodium to <0.5 ppmw in refinery products
  • Processes inlet dispersed liquid contaminant concentrations as high as 10%
  • Separates emulsions with interfacial tensions as low as 0.5 dyne/cm

    Note: Each application for the PhaseSep HE Series L/L Coalescer should be reviewed by Pall Corporation for technical feasibility.


    The Pall pre-filter and horizontal liquid / liquid coalescer system is depicted below. The first stage consists of a pre-filter housing that is used to remove solids from the inlet emulsion stream to protect the coalescer and ensure long service life. The pre-filter also functions as a pre-coalescer by initiating the process of combining the finer droplets in the emulsion into intermediate size drops that continue to enlarge in the coalescer medium.

    In the coalescer housing, the liquid / liquid emulsion enters the PhaseSep HE series coalescing element and flows inside to outside. Dispersed phase droplets that are suspended in the continuous phase come together, or coalesce, as the emulsion moves through the fibrous coalescer medium. The coalescer medium has a tapered pore structure that varies from fine to coarse to allow for the growth of the drops. As the large coalesced droplets of the dispersed phase leave the coalescer cartridges, they are separated via density difference between the two phases in the settling zone of the horizontal housing.  The drops collect in a sump where automated level control and valves monitor the interface level. The sump can be located on the top or the bottom of the coalescer housing to address specific density differences between the two phases.



    Compatibility

    The PhaseSep HE series coalescer is compatible with many corrosive solvents encountered in the refinery, chemical, flavor & fragrance, and biotechnology industries including cumene  hydroperoxide, methylene chloride, ammonia, urea, caustics, amines, alcohols, and many other organic solvents.  For compatibility information with a specific chemical, please contact your Pall distributor or Pall applications engineer.



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Description
For the Most Difficult Emulsions
Pall’s PhaseSep HE Series Coalescer is a high efficiency separation cartridge that is designed to handle the toughest emulsions. Constructed with a fluoropolymer medium, Pall PhaseSep HE Series Coalescers can be used in a wide range of liquid / liquid separations in the refinery, chemical, flavor & fragrance, and biotechnology industries. The Pall PhaseSep HE Coalescer should be used for difficult emulsions where improved performance is required.

Performance of PhaseSep

HE Series Coalescers:
  • Removes sodium down to ≤  1 ppmw in cumene hydroperoxide
  • Decreases sodium to <0.5 ppmw in refinery products
  • Processes inlet dispersed liquid contaminant concentrations as high as 10%
  • Separates emulsions with interfacial tensions as low as 0.5 dyne/cm

    Note: Each application for the PhaseSep HE Series L/L Coalescer should be reviewed by Pall Corporation for technical feasibility.


    The Pall pre-filter and horizontal liquid / liquid coalescer system is depicted below. The first stage consists of a pre-filter housing that is used to remove solids from the inlet emulsion stream to protect the coalescer and ensure long service life. The pre-filter also functions as a pre-coalescer by initiating the process of combining the finer droplets in the emulsion into intermediate size drops that continue to enlarge in the coalescer medium.

    In the coalescer housing, the liquid / liquid emulsion enters the PhaseSep HE series coalescing element and flows inside to outside. Dispersed phase droplets that are suspended in the continuous phase come together, or coalesce, as the emulsion moves through the fibrous coalescer medium. The coalescer medium has a tapered pore structure that varies from fine to coarse to allow for the growth of the drops. As the large coalesced droplets of the dispersed phase leave the coalescer cartridges, they are separated via density difference between the two phases in the settling zone of the horizontal housing.  The drops collect in a sump where automated level control and valves monitor the interface level. The sump can be located on the top or the bottom of the coalescer housing to address specific density differences between the two phases.



    Compatibility

    The PhaseSep HE series coalescer is compatible with many corrosive solvents encountered in the refinery, chemical, flavor & fragrance, and biotechnology industries including cumene  hydroperoxide, methylene chloride, ammonia, urea, caustics, amines, alcohols, and many other organic solvents.  For compatibility information with a specific chemical, please contact your Pall distributor or Pall applications engineer.

Applications
  • Separation of caustic from organic peroxides
  • Separation of caustic or water from methylene chloride
  • Separation of oil from caustic or water streams
Specifications

Performance Claims and Specifications

Maximum Temperature*: 300°F (149°C)

Initial System Pressure Drop: 2 psid (0.14 bar)

Recommended Changeout Pressure Drop: 15 psid (1.03 bar)

Maximum Forward Pressure Drop: 50 psid (3.5 bar)

* With stainless steel end caps, 160°F (71°C) with fluoropolymer end caps.


Materials Of Construction


 
Part NumberMedia/
Outer Sleeve
Support Layer/
Core
End CapsO-ring
         
LCS4HEHH
LCS2HEHH
LCS06HEHH
Fluoropolymer 316L Stainless Steel /
304 Stainless Steel
Melt Bonded
Fluoropolymer
*fluorocarbon elastomer1
         
LCS4HEAH
LCS2HEAH
LCS06HEAH
Fluoropolymer 316L Stainless Steel /
304 Stainless Steel
Epoxy Potted
304 Stainless Steel
*fluorocarbon elastomer1
 

* Also available in Buna N, fluorocarbon elastomer A, Ethylene Propylene (EPM), and Silicone. 

1  fluorocarbon elastomer is a registered trademark of DuPont Dow Elastomers.




 
FeatureAdvantageBenefit
     
Fluoropolymer construction Wide chemical compatibility


Coalescence performance not
impaired by presence of surfactants
Ability to withstand upsets in pH and
aggressive service applications

Eliminates need for emulsion
breaking chemicals
     
Special formulated tapered
pore structure
Can separate liquids that have
low Interfacial tension
Excellent fluid quality

Enhanced protection of downstream
equipment
     
High void volume medium Long service life Lower separation costs
 
Type
Coalescers
Use
Coalescing, Separation
Ordering Information

Coalescer Selection

The presence of difficult-to-separate emulsions can be a costly problem in the refinery, chemical, flavor & fragrance, and biotechnology industries. Liquid contaminants can cause final products to be off-specification, deactivate expensive catalysts, foul contactor and stripping trays, lead to corrosion, result in delays when separation is required in downstream storage tanks, and increase the costs for wastewater treatment.

Breaking stable emulsions can be a difficult task depending on the physical properties of the oil, water, and surfactant system.  Important parameters in determining the ease of separating emulsions are the interfacial tension (IFT), density difference, and viscosity. The IFT is a good way to assess the stability of an emulsion, and along with the amount of shear the fluid has experienced, will determine how small the droplets are in the emulsion. For very stable emulsions with an IFT of less than 20 dyne/cm, conventional glass fiber coalescers can lose their efficiency. One final consideration when selecting a coalescer type is compatibility. Pall offers a wide range of coalescers constructed of various polymers and fluoropolymers to meet the needs of industrial applications.


Ordering Information


 
Part NumberDescriptionNominal DiameterNominal Length
       

LCS4HEHH/
LCS4HEAH

PhaseSep
HE Series
L/L Coalescer
3 3/4 in.
(95.3 mm)
40 in.
(1016 mm )
       
LCS2HEHH/
LCS2HEAH
PhaseSep
HE Series
L/L Coalescer
3 3/4 in.
(95.3 mm)
20 in.
(508 mm )
       
LCS06HEH/
LCS06HEAH
PhaseSep
HE Series
L/L Coalescer
2 3/4 in.
(69.9 mm)
6 in.
(152.4 mm )
 
Application
Petrochem quench water, Chem Final Product (Liquid), Poly Cmdty Intermediate (Fluids), Poly Engrd & Spcl Intermediate (Fluids)
Segment
Chemicals
Petrochemicals
Polymer