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DURO LINE

DURO LINE is a manufacturer of insulated refrigerant line sets used in HVAC and refrigeration systems. The product family consists of pre-insulated tubing assemblies that connect outdoor condensing units to indoor evaporator coils in split-system air conditioning and refrigeration installations. DURO LINE line sets are constructed with steel tubing and steel connection fittings, and are supplied with black elastomeric insulation. The insulation thickness is 1/2 in across the range, and the plain liquid line is available in 1/4 in or 3/8 in outside diameter. Standard lengths include 15 ft, 25 ft, and 50 ft, with part numbers that reflect the configuration: for example, SLS141215 denotes a 15 ft set with a 1/4 in liquid line, while SLS385850 denotes a 50 ft set with a 3/8 in liquid line. The suction line is insulated to limit thermal gain and prevent condensation on the exterior surface. Steel construction is suitable for applications where copper tubing is not specified or where mechanical protection is a consideration. The line sets are intended for field installation by qualified HVAC technicians and are compatible with common brazing or mechanical connection methods, depending on the fittings provided. 3G Electric supplies the DURO LINE insulated line set range as part of its industrial equipment catalog. Available SKUs cover the common liquid-line diameters and lengths, allowing procurement to match the line set to the condensing unit and evaporator coil requirements of a given project. Each product listing includes specifications such as line material, connection material, insulation thickness, insulation color, and plain liquid line size. 3G Electric provides datasheets and logistics support for global delivery. The line sets are stocked in multiple configurations, and the catalog is structured to allow buyers to identify the correct part number by length and liquid-line diameter. For plant engineers and maintenance managers, DURO LINE line sets offer a defined set of materials and dimensions that can be verified against system requirements before installation. The steel tubing and fittings are consistent across the range, and the elastomeric insulation is rated for the temperature ranges typical of HVAC and refrigeration service. The product family does not include additional controls, valves, or accessories; it is limited to the insulated line set assembly. This focus allows specifiers to treat the line set as a single line item with known dimensions and materials. 3G Electric maintains the DURO LINE line set catalog with current part numbers and specifications, and can provide quotes for specific lengths and liquid-line sizes. The company ships globally and supports procurement teams with documentation and order fulfillment. For system designers, the availability of 15 ft, 25 ft, and 50 ft lengths in both 1/4 in and 3/8 in liquid-line diameters covers many common split-system layouts. The steel construction and black elastomeric insulation are consistent across all SKUs, simplifying substitution when a different length is required. The line sets are packaged for transport and are intended for installation by trained personnel. 3G Electric does not manufacture DURO LINE products; it distributes them as part of its portfolio of industrial equipment. The catalog entries for DURO LINE include the manufacturer part number, SKU, and key specifications to assist with identification and cross-referencing. Buyers can request datasheets and additional technical information through 3G Electric's standard procurement channels.

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About DURO LINE

DURO LINE is a manufacturer of insulated refrigerant line sets used in HVAC and refrigeration systems. The product family consists of pre-insulated tubing assemblies that connect outdoor condensing units to indoor evaporator coils in split-system air conditioning and refrigeration installations. DURO LINE line sets are constructed with steel tubing and steel connection fittings, and are supplied with black elastomeric insulation. The insulation thickness is 1/2 in across the range, and the plain liquid line is available in 1/4 in or 3/8 in outside diameter. Standard lengths include 15 ft, 25 ft, and 50 ft, with part numbers that reflect the configuration: for example, SLS141215 denotes a 15 ft set with a 1/4 in liquid line, while SLS385850 denotes a 50 ft set with a 3/8 in liquid line. The suction line is insulated to limit thermal gain and prevent condensation on the exterior surface. Steel construction is suitable for applications where copper tubing is not specified or where mechanical protection is a consideration. The line sets are intended for field installation by qualified HVAC technicians and are compatible with common brazing or mechanical connection methods, depending on the fittings provided. 3G Electric supplies the DURO LINE insulated line set range as part of its industrial equipment catalog. Available SKUs cover the common liquid-line diameters and lengths, allowing procurement to match the line set to the condensing unit and evaporator coil requirements of a given project. Each product listing includes specifications such as line material, connection material, insulation thickness, insulation color, and plain liquid line size. 3G Electric provides datasheets and logistics support for global delivery. The line sets are stocked in multiple configurations, and the catalog is structured to allow buyers to identify the correct part number by length and liquid-line diameter. For plant engineers and maintenance managers, DURO LINE line sets offer a defined set of materials and dimensions that can be verified against system requirements before installation. The steel tubing and fittings are consistent across the range, and the elastomeric insulation is rated for the temperature ranges typical of HVAC and refrigeration service. The product family does not include additional controls, valves, or accessories; it is limited to the insulated line set assembly. This focus allows specifiers to treat the line set as a single line item with known dimensions and materials. 3G Electric maintains the DURO LINE line set catalog with current part numbers and specifications, and can provide quotes for specific lengths and liquid-line sizes. The company ships globally and supports procurement teams with documentation and order fulfillment. For system designers, the availability of 15 ft, 25 ft, and 50 ft lengths in both 1/4 in and 3/8 in liquid-line diameters covers many common split-system layouts. The steel construction and black elastomeric insulation are consistent across all SKUs, simplifying substitution when a different length is required. The line sets are packaged for transport and are intended for installation by trained personnel. 3G Electric does not manufacture DURO LINE products; it distributes them as part of its portfolio of industrial equipment. The catalog entries for DURO LINE include the manufacturer part number, SKU, and key specifications to assist with identification and cross-referencing. Buyers can request datasheets and additional technical information through 3G Electric's standard procurement channels.

Common Applications

  • Split-system air conditioning — DURO LINE steel insulated line set (e.g., SLS141225) connects outdoor condensing unit to indoor evaporator coil.
  • Commercial refrigeration — DURO LINE 50 ft line set with 3/8 in liquid line (SLS385850) for remote condensing unit installations.
  • Residential HVAC replacement — DURO LINE 15 ft line set (SLS141215) for short-run connections in split systems.
  • Light commercial HVAC — DURO LINE 25 ft line set with 1/2 in insulation (SLS387825) for rooftop or indoor coil connections.
  • Industrial process cooling — DURO LINE steel line sets for refrigerant piping where steel tubing is specified.
  • Maintenance and repair — DURO LINE line sets in 25 ft and 50 ft lengths for replacing damaged or corroded refrigerant lines.

Frequently asked questions

Common questions about DURO LINE from 3G Electric.

What sizes of DURO LINE insulated line sets does 3G Electric supply?

3G Electric supplies DURO LINE insulated line sets in 15 ft, 25 ft, and 50 ft lengths. The plain liquid line is available in 1/4 in or 3/8 in outside diameter. All configurations use 1/2 in black elastomeric insulation on the suction line. Part numbers follow a pattern that indicates length and liquid-line size, such as SLS141215 for a 15 ft set with a 1/4 in liquid line, or SLS385850 for a 50 ft set with a 3/8 in liquid line. The catalog includes multiple SKUs to cover common split-system layouts.

What materials are used in DURO LINE refrigerant line sets?

DURO LINE line sets are constructed with steel tubing and steel connection fittings. The insulation is black elastomeric material with a 1/2 in thickness. The use of steel for both the line and connections distinguishes these sets from copper-based alternatives. The elastomeric insulation is intended to reduce thermal gain and prevent condensation on the suction line. The liquid line is uninsulated and is available in 1/4 in or 3/8 in outside diameter. These material specifications are consistent across the DURO LINE line set range.

Can DURO LINE line sets be used in refrigeration systems as well as HVAC?

DURO LINE insulated line sets are used to connect outdoor condensing units to indoor evaporator coils in split HVAC systems and in refrigeration applications. The product descriptions indicate use in both HVAC and refrigeration contexts. The steel construction and elastomeric insulation are suitable for the temperature ranges typical of these systems. However, the specific refrigerant and operating pressure should be verified against the line set's ratings. The line sets are intended for installation by qualified technicians using appropriate connection methods for steel tubing.

How do I identify the correct DURO LINE part number for my application?

DURO LINE part numbers encode the line set configuration. For example, SLS141225 indicates a 25 ft length with a 1/4 in liquid line, while SLS387825 indicates a 25 ft length with a 3/8 in liquid line. The first digits after SLS relate to the liquid-line size and length. To select the correct part, determine the required length and the liquid-line diameter needed for the condensing unit and evaporator coil. 3G Electric's catalog lists each SKU with its specifications, including length, liquid-line size, insulation thickness, and materials, to assist with identification.

Does 3G Electric provide datasheets for DURO LINE products?

Yes, 3G Electric provides datasheets for DURO LINE insulated line sets as part of its product documentation. The datasheets include specifications such as line material, connection material, insulation thickness, insulation color, plain liquid line size, and overall length. These documents can be used for submittals, verification, and procurement records. 3G Electric supports global delivery and can provide quotes for specific SKUs. For additional technical information not included in the datasheet, buyers can contact 3G Electric through standard procurement channels.

What is the insulation thickness on DURO LINE line sets?

DURO LINE insulated line sets feature 1/2 in thick black elastomeric insulation on the suction line. This thickness is consistent across the range of lengths and liquid-line diameters. The insulation is designed to minimize thermal gain and prevent condensation on the exterior of the suction line. The liquid line is not insulated. The insulation material is elastomeric, which is a closed-cell material commonly used in HVAC and refrigeration piping applications. The black color is standard for DURO LINE line sets.