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American LOKRINGCorporation

HVAC Catalog

American LOKRING Corporation

2551 SR 60 WBartow, FL 33830

863-533-4168 www.lokringusa.com 863-733-9030Phone Fax

Local Distributor

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General remarks

LOKRING tube connection technology represents a provenmethod of producing hermetically sealed metal-to-metal tubeconnections. The LOKRING tube connectors are used in theair-conditioning* (including automotive) and in therefrigeration* and appliance* industries.

100% QualityAmerican LOKRING Corporation is responsible for the deliveryof quality tube connectors and tools as ordered from thiscatalog. The purchaser is responsible for the assembly ofLOKRING tube connectors and use of LOKRING tools inaccordance with supplied instruction and exclusively withoriginal LOKRING parts.

Commitment to

Customer Service

This catalog contains information about LOKRING tubeconnectors for tube diameters from 1.6mm (1/16) up to 35mm(1 3/8).

American LOKRING reserves the right to makes changes forthe purposes of technical improvement. Product descriptionsand size range current as of December 2006.

*The use of LOKRING tube connections in other fields shouldbe discussed with American LOKRING Corporation

LOKRING tube connection technology in

the service field

LOKRING for Refrigeration and Freezer

Production

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LOKRING Technical InformationThe special inner profile of the LOKRING Connector causes the

diameter of the LOKRING body to be reduced until it is inimmediate contact with the outer surface of the tube that is beingconnected. This grip creates a metal-to-metal hermetic seal with a

slight reduction of the tubes. This reduction causes no detectablechange in pressure or flow rate.

The radial forces of the tube and the connecting body resisting

reduction are directed to the outside. And the radial forces of theLOKRINGS resisting expansion are directed to the inside causinga state of equilibrium known as elastic strain pre-load. This

equilibrium is maintained for the life of the LOKRING connection

Structure and Function of

LOKRING Couplings

LOKRING Technology takes advantage of the fundamental lawsof physics, material properties and basic engineering principles toarrive at an elegant design for joining tubes of similar or dissimilarmaterials. A LOKRING Union Coupling consists of two LOKRINGSand a tubular body.

During assembly of a LOKRING Connection, the tubes to be joinedare inserted into the coupling up to an internal stop. The LOKRING

Assembly Tool is then used to apply pressure to the couplingcausing it to compress and complete the connection. This is a quick

and simple method of joining tubes that eliminates the fire hazardsof brazing and proper torque concerns of threaded connections.

Custom LOKRING Kits

We have several standard kits available in stock

Custom Kits can be assembled to meet yourparticular needs

221

Tube

Before

Assembly

Lokring

CenterStemLokring

Tube

After

Assembly

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Easy and Fast Assembly.

Highly Reliable connections.

No Special Preparation.

No Welding, Soldering, or Thread cutting

Ecologically Safe.

Hermetically Sealed Metal-to-Metal Connections

No Notch Effect on the Assembly Area.

Connections Tubes of Different Materials.

LOKRING Technical Information

Pressure Area

LOKRING Couplings are designed for a maximum operation pressure

of Pn = 725psi (50 bar) and a testing pressure of Pp = 4 x Pn = 2900psi (200 bar). LOKRING Couplings can be used in temperature range

between -58 F and + 302 F (-50 C and +150 C).

The expansion or contraction of the material caused by temperaturechanges has no impact in the elasticity of the tube connection. Bursttests have shown that the LOKRING Tube Connector is stronger than

the burst point of the tube.

COMMON MISTAKES

3 20

Tube

Before

Assembly

Lokring

Center

StemLokring Tube

After

Assembly

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HAND Assembly Tools

For All LOKRING Tube Connectors

The LOKRING Assembly Handtools feature a folding handle to

allow for easy assembly of all Series 00 and Series 50 LOKRINGConnectors. The design provides maximum compression withminimal effort.

The MZ & MZ-V Heavy Duty Handtools work with all sizes of

LOKRING Connectors, both double-sided and single sided.

The lightweight HMRK-L Handtool is especially designed forsmaller LOKRING

Connectors through 19mm (3/4).

Hardened Steel Jaws are interchangeable.

Specialized accessories allow for custom applications.

12 month material and workmanship warranty.

Replacement parts for wear items.

LOKRING Assembly Tools

MZ-V Handtool

MZ Handtool

50 SERIES ASSEMBLY

To facilitate the application of LOKPREP at the end of the tubes

which have to be connected, all the LOKRING couplings,reducing couplings, elbows and tee-connectors, with one

connection >=12 mm, are supplied, loosely joined by anylon loop. The assembly has to be performed accordingto the following instructions:

1. Clean Cut and prepare tubes as normal for LOKRING

applications. See previous page.2. Assembly

Cut the nylon loop(s) and position the LOKRINGS on the

tubes chamfer side toward tube end.

Apply the LOKPREP as described on previous page.

Attach the LOKRING joint to one of the tube ends up to the

internal stop of the connection.

Slip Lokring connector body over tube end and rotate 360degrees to evenly distribute Lokprep.

The LOKRING has to be pushed onto the connector body.

Then the LOKRING connector must be seated squarely inthe assembly jaws of the handtool.

By ratcheting the hand assembly tool, the LOKRING ispushed onto the connector body up to the external center

stop.

Assemble second tube (as well as the third tube of the tee-connection) in the same manner.

( See previous page or Lokring instruction CD for more completeinstructions)

ROMAX 220

Rechargeable Battery

Operated Assembly Tool(15lbs.)

419

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5 6 7.5 8 9 9.53 10 11 12 12.7 14 15 16 18 19 20 22 25.4 28 28.6 31.8 35

1/4" 5/16" 3/8" 1/2" 5/8" 7/8" 1" 1 1/8" 1 3/8"

Tube mm

LOKRING 12.7 NK MS 50Part number for a Single-sided brass connector for

joining 12.7mm (1/2).

Brass Connectors - NK(Aluminum available upon request)

for tube materials:Cu/Cu, Cu/St, St/St

Conversion Chart

LOKRING fittings are manufactured to metric standards. They havebeen thoroughly tested for compatibility with inch-sized tubing. Pleaseuse the table below for ordering the correct size LOKRING

Connectors to match your tubing requirements.

HOW TO READ LOKRING PART NUMBERS

6 NK Ms 50

Tube Size Fitting Style Material Single or Double Sided

This is the part number for a brass (Ms) connector to join 6mm(1/4) tubes. The

50 indicates that each side of tube connection is crimpedseparately.

Styles Material

NK Union Connector MS Brass ConnectorNR Reducing Connector Al Aluminum ConnectorNTK Tee Connector

NWK Elbow Connector

Inch * Actual LOKRING Inch * Actual LOKRING Inch * Actual LOKRINGConversion Size Conversion Size Conversion Size

1/16 1.59 1.6 1/4 6.35 6 NS** 15

NS** 1.8 NS** 6.5 5/8 15.88 16

5/64 1.98 2 NS** 7 NS** 18

0.087 2.21 2.2 NS** 7.5 3/4 19.05 19

0.098 2.49 2.5 5/16 7.94 8 7/8 22.23 22

0.118 3.00 3 NS** 8.5 1 1.000 25.4

1/8 3.18 3.2 3/8 9.53 9.53 1 1/8 28.6 28.6

0.138 3.51 3.5 NS** 10 1 1/4 31.8 31.8

5/32 3.96 4 NS** 11 1 3/8 35 35

NS** 4.5 NS** 12

3/16 4.76 5 1/2 12.7 12.7

** NS - No Standard Inch Equivalent* Decimal number or common fraction

Inch To Metric Conversions

617

LOKRING Reducing Connectors Brass NR(Aluminum available upon request)

LOKRING 16/13 NR MS 50

Single sided Brass reducingconnectors for joining 16mm

(5/8) to 13mm (1/2) tubes.

S-1

1.8 2 2.2 2.5 3 3.2 3.5 5 6 7 7.5 8 8.5 9 9.53 10 11 12 12.7 15 16 18 19 20 22

7

8

9

9.53

10

10.5

11

11.5

12

12.5

12.7

14

15

16

18

19

20

22

25.4

28

Side-2

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716

LOKRING 12.7 NTK MS 50

Part number for a Single-sided brass tee

connector for joining 12.7mm (1/2) tube.

LOKRING 16/13/9.53 NTR MS 50Single-sided reducing connector forjoining 16mm (5/16+) to 9.53mm (3/8)tubes with a 13mm (1/2) tube on the

TEE>

LOKRING Tee Connectors and Elbows

6 8 9.53 10 12 12.7 15 16 18 19 20 22 25.4 28.6

Tube mm

120 DEGREE TUBE CUTTER

For All Ref/AC Tubing 3/16 5/8

Diameter. Cuts Tubes in ConfinedSpaces Cuts Close to Flanges & Joints.Replacement Cutting Wheels Available

LOKRING RATCHET-CUTTER

It ratchets, Its small,

It cuts in tight placesCuts aluminum, copper, plastic, PVC &

soft steel tubing.

RC-1125

Cuts 5/16 to 1/1/8

RC-375

Cuts 1/8 to 1/2

6 Digital Calipers(measures in mm or inches)

6 8 9.53 1 0 12 12.7 15 16 18 19 20 22

Tube mm

S-1

6 8 8 10

8

9

9.53

10

11

12

12.7

Side-2

LOKRING Tees with Schrader Valves

LOKRING 16 NK MS SV 50Part number for a Single-sided brass connector with a

schrader valve for joining 16mm (5/8) tubes.

LOKRING 9.53/6 NR MS SV 50

Single-sided brass reducing Tee forinstalling a schrader valve at a

9.53m (3/8) to 6mm (1/4) junction.

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815

LOKRING 16 NWK MS 50

Brass elbow for joining 16mm (5/8) tubes.

6 8 9.53 10 12 12.7 15 16 18 19 20 22 25.4 28.6

1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1 1/8"

Tube mm

LOKRING 16/6 NWR MS 50

Reducing Brass elbow for joining a 16mm (5/8) tubes to a 6mmtube.

S-1

2 5 6 8 9.53 10 10.5 12 12.7 15 16 18 19

5

6

7

8

8.5

9.53

10.5

12

12.7

14.5

15

16

18

19

22

Side-2

Elbows

LOKRING 16 NWK LR MS 50

Brass long radius elbow for joining 16mm (5/8) tubes.

9.53 12.7 16 19 22 28.6 35

3/8" 1/2" 5/8" 3/4" 7/8" 1 1/8 1 3/8"

Tube mm

ASSEMBLY TOOLSThe Manual Assembly Tool HMRK-L, MZ, or MZ-V

Use these tools to assemble LOKRING union couplings,reducer couplings, tees and stoppers on tubes with a maximum

diameter of 22mm (7/8). Assembly jaws can be changed to fitthe tube diameter by pressing the retaining pin out, changing

the jaws to match the coupling size and pushing the pin back inplace. As shown in the illustration, the handles of the Assembly

Tool can be preset with one arm bent, to facilitate changing thejaws or placing the coupling in the jaws.

After assembly, clean the jaws to remove any traces ofLOKPREP. All moving parts on the manual assembly tool must

be oiled regularly.

MZ-V Handtool

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REFLOCK 100

REFLOCK 200

REFLOCK 310

REFLOCK 410

1013

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REFLOCK 300

REFLOCK 400

REFLOCK 110

REFLOCK 210

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