Bi-Directional Filter Driers Series STG/L

Filter-Driers Bi-Directional Filter Driers Series STG/L

The filter driers of series STG/L are used in refrigeration system with bi-directional flow to absorb moisture and acid in the system and to filter out the impurities.

Technical parameters

  • Features
    • High efficient in moisture absorption, filtering impurity, acid, paint remains and mud removal
    • Hybrid desiccant
    • Filtering fineness: 20µm
    • Corrosion resistant painting can survive salt spray test of 500 hours
    • Connection type: thread or solder
    • Full dimensions, capacity and moisture capacity available on the Data Sheet download below 
  • General specifications
    • Applicable for all common HCFC, HFC and CFC refrigerants such as: R22, R134a, R404A, R407C, R410A, R507
    • Min./max. ambient temperature: -30°C to +55°C
    • Medium Temperature TS min./max.: -30°C (-22°F) / +120°C (248°F)
    • PS: 4,83 MPa (48.3 bar) 700 PSI
    • Certifications: UL/CSA & PED Declaration
  • Technical Parameters

    Desiccant Selection Table
    Medium Type 80% 3A desiccant and 20% active alumina 100% 3A desiccant
    Refrigerant HFC Applicable Applicable
    HCFC Applicable Applicable
    CFC Applicable Not Applicable
    HC Applicable Applicable
    Oil Mineral oil or AB Applicable Applicable
    Pure POE or PAG Applicable Applicable
    POE or PAG with additive Not Applicable Applicable


    1. 1) For CFC system, usage of core with alumina is recommended as a strong capability to absorb acid may be needed.
    2. 2) When the systems use oil with additive, it is not recommended to use a core with alumina.

    Part Number Legend
    1 Product Code
    DTG Indicates unidirectional filter drier with solder connection
    DTGL Indicates unidirectional filter drier with thread connection
    2 Internal volume Expressed in inch3 Expressed in cm3
    3 3 49
    5 5 82
    8 8 131
    16 16 262
    30 30 492
    3 Connection size Expressed in inch Expressed in mm
    2 1/4 -
    2,5 5/16 -
    3 3/8 -
    4 1/2 -
    5 5/8 16
    6 3/4 -
    7 7/8 22
    9 1 1/8 -
    4 Form of inner core
    T Solid core
    5 Components of core

  • Selection Formulas

    Filter Driers for liquid line are manufactured in compliance with ARI Standard 710. Maximum flow rate of liquid refrigerant at a differential pressure of 0,07bar (1psi) is indicated by kW (ton) which is based on the temperature of liquid refrigerant 30°C (86°F) and the following mass flow:

    • 0,40 kg/min/kW (3.1 lb/min/ton) R134a
    • 0,53 kg/min/kW (4.1 lb/min/ton) R404A, R507
    • 0,39 kg/min/kW (3.0 lb/min/ton) R22, R407C
    • 0,36 kg/min/kW (2.8 lb/min/ton) R410A

    Note: Data on water absorption is based on the following EPD (method: ASHRAE Standard 63.1):

    • 60ppm R22
    • 15ppm R12
    • 30ppm R502
    • 50ppm R134a, R404A, R507, R410A, R407C

    Note: The above data is based on clean system at ideal conditions; with impurities accumulated in the filter, the flow may decrease.

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Datasheet Instructions