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Epsilon® Low Spill Coupling System


EPSILON® is a low spill coupling, based on a double ball valve system integrating a sophisticated safety design. Beyond the common advantages of a ball valve design, EPSILON® provides for product flow through an unrestricted flowpath and double shut-off reliability in the coupling connection.

The EPSILON® Coupling System is designed to prevent chemical spills and reduce fugitive emissions of Volatile Organic Compounds (VOCs), particularly in the process facility and during transfer to and from tank trucks and tank cars.

During in-plant chemical transfers, the EPSILON® Chemical Containment System will provide your Plant with process flexibility, while improving operator safety, enhancing environmental compliance and reducing overall capital expenditures and operating costs.

EPSILON® Applications:

The following is a listing of some of the applications/products that have successfully used Epsilon®.

Chemical Application
ACN, BD, Latex  
Acrylamid Polymers, Flocculants   
Acrylates, Polymers, Solvents   
Acrylic acid, aliph. Amines, Dispersions, Nitrobenzene, Benzene, C4-Components, flammable Solvents, Steam, Acrylmonomers, Diphyl, Oleum, HBr, Chloroformic acid (Chlorameisensre.)   
Adhesives  In Plant 
aliphat. Amines   
Ammonia water   
Biodiesel  In Plant 
Butyrolactone, THF, Butanediole, BD, Methanol   
EO, PO   
Ethylene Oxide (EO)  Railcar 
Fine Chemicals   
Fine Chemicals, Syltherm (Heat transfer Oil)   
Flavors, Fragrances   
Glues, Adhesives   
Hydrofluoric Acid   
Isocyanates, Xelene, n-Butylacetate   
Liquid Ammonia   
liquid Ammonia, Methylamines, ACN, EO   
liquid Cristals   
Methanol  Offshore 
Paints, Dispersions, Isophtaloylchloride   
Paints, Resins, Glue   
Pharmaceutical Chemicals, Dichloromethane, Toluene, Solvents   
Pharmaceuticals, Ammonia (23%), pharmaceutical Slurries   
Pharmaceuticals, Sylterm   
Pharmaceuticals, Sylterm   
Phenol, ACN, Acrylic acid, Acrylacetate, Dispersions, NaOH, H2O2   
Photographic Chemicals   
Process Development   
R134A, (Fluorinated Hydrocarbons)   
Refrigerant / Blowing Agent  Tank Cars/Trucks 
Rheovis Tank Truck   
Silane, Siloxane, Chloro-Silane, Solvents, Waste Treatment   
Solvents, Paint Resins   
Terypidal Tars   
Transformer Oil, Acrylates, Benzene, Toluene, Xylene, Aliphatic Solvents   
Trichloroacetic acid   

Features & Benefits
  • Lowest fluid loss, driven by the innovative unique double ball-valve system, ensures the lowest product loss in the industry.
  • Dry Disconnect Reliability – Low spill face seal reduces amount of loss upon disconnect, specified to less than  0.40 ml spillage for the 2” coupling (2000 cycles test average 0.6 ml) and less than 0.10ml of a teaspoon (half an eyedropper).
  • Various sizes available - 1", 2" and 3"
  • Enhanced Environmental Compliance – Positive shut-off of coupling halves eliminates line contamination and accidental release of potentially hazardous fluids into the environment during connection and disconnection.
  • Full Flow – Straight-through flow path provides unrestricted flow in either direction, minimizing pressure drop.
  • Unrestricted flow path provides less than 1 psi pressure drop at 560LPM. No turbulence! 
  • Unparalleled Safety – Multiple safety interlocks eliminate unintentional spills and catastrophic chemical releases that threaten worker safety and the environment.
  • EPSILON® safety interlocks force the valves to open and close only with a deliberate action, preventing accidental opening of the valve.
  • Optimal defense against cross-contamination with optional keyed couplings that mechanically lock out and isolate transfer lines.
  • Engineered for easy operation and maintenance with no special tools needed for seal replacements.
  • 316 Stainless or Hastelloy® Construction for critical, aggressive, corrosive fluids.

Recommended products for replacement

    Technical Information

    Next generation PTFE with best combination of temperature ranging from -22°F (-30°C) to 450°F (230°C), sealing, and sliding characteristics.

    Available sizes
    Available in 1",  2" and 3” Sizes.

    Available in Stainless Steel and Hastelloy® C.

    Seal Materials
    FDA-compliant seal materials, TFM or PFA.

    End Connections
    Available with end connections complying to ANSI and DIN standards.

    Pressure & Temperature Ratings
    Constructed to handle pressure of 435 psi (30 Bar) temperatures from -30
    °C up to 230°C.



    Performance Characteristics

    Pressure Drop vs. Flow Chart


    Ordering Information

    Order Guide



    Seal Kit Order Guide

    • Ultra Low Spill Face Seal
      • This seal reduces the amount of spillage at disconnect to .2 cc. This seal is not pressure assisted and should only be used for applications lower than 100 psi.
    • Cavity Filled
      • Designed to reduce the possibility of contamination by entrapment of process fluid in the void normally found behind the ball and the valve body. Ideal for applications where cross-contamination and cleanliness is a concern. Back side of the valve balls are bored for efficient cleaning.
    • Keyed Couplings
      • For extremely critical operations, Epsilon offers the unique keyed interface which locks out and isolates transfer lines, preventing cross-contamination.
    • Dual Ball Race (Optional)
      • Radial swivel seal
        • Replaces dynamic face seal
        • Lower leak rate
        • Lower seal mortality rate caused by over-compressing seal to install bearings
      • Dual ball races with hardened stainless bearings
        • Replaces PTFE sleeve bearing that may become overloaded and allow greater axial misalignment causing the dynamic face seal to leak
        • Provides additional support for applications with long hose drops or high load requirements
      • Spring energized dust seal
    • Transportation Coupling System (TCS)
      • Specially designed for railcar, truck, isotainer or tote equipment used in transporting chemicals safely. Contact us for more information.
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