VULKAN LOKRING (American Vulkan) Refrigerator LOKRING 7.5/7 NR Ms 00 brass reducing connector L13000649

Braze-free brass Lokring reducer for joining sealed-system refrigerant tubing with nominal tube outside diameters of 0.295 inch (7.5 mm) and 0.276 inch (7 mm). Used in refrigerator and other refrigeration-appliance sealed systems.

Is This the Right Part?

Common Symptoms

• Reduced or absent cooling after a sealed-system repair
• Compressor running for unusually long periods when refrigerant charge has been lost
• Visible oil residue or discoloration near the connector or tubing joint
• Suspected sealed-system leak at a connection using this reducer

Check Before Replacing

• Visually inspect the connector, tube ends, and surrounding area for oil residue, corrosion, tube movement, or an obviously incomplete joint.
• Verify the outside diameters of the connected tubes with a digital caliper; this connector is specified for approximately 7.5 mm and 7 mm tube outside diameters.
• With the appliance powered off, visually check whether the connector rings appear fully seated and flush with the connector center stop; do not manipulate or load the tubing.
• Have a qualified refrigeration technician perform an approved leak test and sealed-system pressure evaluation before concluding that this connector is defective.

Pro Tip

Part Details

Key Features

• Genuine VULKAN/American Vulkan LOKRING Type 00 brass reducer.
• Connects copper and/or steel refrigeration tubes with different outside diameters.
• 7.5 mm (0.295 inch) to 7 mm (0.276 inch) nominal tube-size configuration.
• Braze-free connection design for refrigeration-appliance sealed-system repair.
• Specified Type 00 operating range includes refrigerants such as hydrocarbons and HFC mixtures; not suitable for ammonia according to VULKAN Type 00 documentation.
• Maximum operating pressure and allowable tube-wall requirements must be confirmed from the applicable VULKAN technical documentation before use.

Installation Notes

• Installation should be performed by a qualified refrigeration technician familiar with sealed-system service and the applicable refrigerant.
• Confirm tube outside diameters before installation; do not assume visually similar tubing is compatible.
• Clean tube ends rotationally to remove paint and surface contamination, then apply VULKAN LOKPREP 65G as specified by the Type 00 assembly instructions.
• Insert the tubes to the connector stops, rotate the connector as instructed to distribute LOKPREP, and observe the specified curing time.
• Use the appropriate LOKRING hand assembly tool with its jaws positioned squarely on the connector rings; keep both tubes seated during compression.
• After assembly and curing, perform the applicable approved leak, pressure, evacuation, and refrigerant-charging procedures. Do not open or service the refrigerant circuit without the required qualifications and equipment.