K2389-9 - Lincoln Electric 1-3/4" x 8' Miniflex Extraction Hose Extension

Technical Overview of the Lincoln Electric K2389-9

The Lincoln Electric K2389-9 is a specialized extraction hose designed to integrate seamlessly with low-vacuum, high-volume fume extraction systems such as the Miniflex® and X-Tractor® 1GC. Engineered for industrial durability, this hose features a 1-3/4 inch (45mm) internal diameter and spans a length of 8 feet (2.5 meters). The hose body is constructed from a high-temperature resistant flexible material, making it suitable for the thermal conditions often present near welding arcs. Crucially, the structure is reinforced with a spring steel helix. This reinforcement serves a dual purpose: it prevents the hose from collapsing under the negative pressure generated by the vacuum unit, and it provides mechanical protection against crushing or kinking during daily shop use.

Integration is streamlined via the inclusion of hose-to-tube adapters on both ends of the assembly. These adapters are sized specifically at 1-3/4 inches (45mm) to mate directly with the inlet ports of the Miniflex base units as well as the outlet ports of standard EN-20 and EN-40 extraction nozzles. This modularity allows the K2389-9 to function either as a primary hose replacement or as an extension to an existing setup. However, system designers and safety officers should note the manufacturer's recommendation regarding total hose length. To maintain effective capture velocity and static pressure at the hood, it is recommended that the total hose length not exceed 24 feet (7.5 meters) when used with the Miniflex system, although other base units may support up to 45 feet (15 meters) depending on their fan curves.

The K2389-9 is an essential component for maintaining regulatory compliance in welding environments. By ensuring a secure and leak-free connection between the capture nozzle and the filtration unit, it maximizes the efficiency of particulate removal. The smooth bore of the adapters and the consistent diameter of the hose help minimize friction loss, ensuring that the extraction unit operates within its optimal performance envelope. This component is critical for MRO (Maintenance, Repair, and Operations) professionals managing welding safety equipment, offering a reliable solution for extending the reach of portable fume extractors.