Lokring Service Connector Instructions

8/7/2019 Lokring Service Connector Instructions

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LOKRINGLOKRINGTUBING CONNECTORSTUBING CONNECTORS

A HIGHLY RELIABLE METHOD FOR JOININGMETALLIC TUBING



LOKRING HISTORY

In the late 1960’s, Lokrings were invented to solve braze jointproblems in the B-1 bomber program.

By the late 1970’s, the patent rights for refrigerant applications weresecured by the VULKAN-HackforthGroup in Germany.

VULKAN LOKRING was integrated into the VULKAN HackforthGroup and design, manufacturing and sales were launched in 1979.

Due to the extensive use of ISO-Butane, Lokrings quickly dominatedthe OEM and service markets in Europe.

In 1992, VULKAN-Hackforth purchased rights to the US market.

More than 90 Million OEM rings are being installed annually byAppliance, HVAC & Automotive manufacturers.



Speed and Ease of Installation

The LOKRING Tube Connection allows a fast and

reliable connection of tubes, even of differentmaterial. This tube connection system is a cold,clean method that eliminates the need for Brazing.

Field reports indicate a Labor savings of between30% and 50% on various Ductless System

Installations and also eliminates the need fornitrogen flow during installs.



Lokring Basics

1. Clean tube ends with abrasive mat or fine emery cloth & debur asnecessary.

2. Apply stabilization inserts if required.3. Place the ring (chamfered edge facing tube end) over the tube if

not pre-mounted on the Lokring body.

4. Apply sufficient Lokprep to tube. (1 to 2 beads completely around

the tube end depending on size. ( 1 bead ½ inch and under 2beads over ½ inch.)

5. Place Lokring over tube to internal stop and rotate tube or Lokringto distribute Lokprep.

6. Using appropriate jaws and Lokring assembly tool, push the 1st

ring onto the Lokring body until fully seated to stop.

7. Repeat steps 3 thru 6 for second side of Lokring connector.

8. Allow Lokprep a minimum of 10 minutes set up time before

applying stress, vacuum or pressure to the connection. (Note intemperatures below 55 F allow 30 minutes)



Tube Cleaning

Tubes should be

cleaned using a radialmotion with an

abrasive mat or similar

fine abrasive product.



Stabilization Inserts

Stabilization Inserts should always be used on soft

copper tube sizes 3/8 inch thru 3/4 inch.



Lokprep Application

Proper applicationdose of Lokprep ontube sizes ¼ thru ½

inch is approx. one1/8 inch bead 360

degrees around the

tube ¼ inch back fromthe end of the tube.



Lokprep on sizes larger than ½ inch

One additional beadof Lokprep between

½ and ¾ inch backfrom the end of thetube is needed forproper coverage.



Dispersing Lokprep

The Lokring shouldbe placed over the

end of the tube andturned 360

degrees to evenly

disperse Lokprep.



Visual Aid for Proper Tube Insertion

1. Remove ring fromLokring body.

2. Place ring overtube chamferedside toward tubeend.

3. Place Lokring bodyover tube end untilfully seat againstinternal stop andmark tube.

4. After completingconnection, marksaligning withLokring body endindicate tube iscorrectly inserted.

1 2

3 4



Tube must beinserted fully to

Lokring internal stop.

Wrong

Correct



Lokring Assembly Tool

Position the tool with the correct jaws

sizes over the Lokring connector asshown and operate the tool ensuringthe tube remains fully inserted and

jaws are properly seated.

Continue to operate the tool until

the ring is fully seated against thestop. Use the same steps to

complete the other side of theLokring connector.



Completed Connection

Both rings fully seatedagainst stops. Lokring

connection is readyfor service.



THE COLD CLEAN CONNECTIONTHE COLD CLEAN CONNECTION

Internal Cleanliness comparison of aLokring Connection and a Brazed Joint.

Documents

Lokring Service Connector Instructions