ALUMINUM ALLOY INDUSTRIAL GAS TUBE FITTINGS

ALUMINUM ALLOY INDUSTRIAL GAS TUBE FITTINGS

LOCUS Tube Fittings

1

Introduction

Technical Information

LOCUS Tube Fittings

Installation Instructions

Spiral Tube

13

Index

Nut with tube guide

14

Union Elbow

11

Union Tee

11

Male Connector

7

Female Connector

8

Union

10

Reducing Union

10

Union Cross

12

Multi Flow Tube

13

2

3

6

16

LOCUS Tube Fittings

2

Introduction

Feature

u Quick and Easy to install ; No torque wrench

u Use to tube guide ; No Marking to depth

u Lightweight

u Possible to the cost reduction by using LOCUS Tube fittings and AL Coated tube.

u Compatible to tubes of different materials ; No Corrosion

u Completed Sealing System; Durability, Chemical Resistance, wear resistance, Vibration

Resistance

Construction

LOCUS Tube Fitting consists of body, Link Assembly, O-rings, tube guide and nut.

The features include;

u Product range up to 1/4” in. and 3/4” OD.

u Excellent leak-free sealing integrity on vibration,

vacuum.

u ONLY SING-USE of Link

u No torque transferring to connective tubing

during installation.

u Easily installation on tube guide

u Block from dirt and dust by O-ring

TUBEBODY

NUT

LINK

NUT

BODY

O-RING

TUBE GUIDE

LOCUS Tube Fittings

3


Table 1. Typical Material Specification

Material Bar Stock Forging

Aluminum Alloy

ASTM B211KS D6763ASTM B221MKS D6761

ASTM B247MKS D 6770

CopperASTM B 75ASTM B 88

Stainless Steel 316ASTM A479ASME SA479

Materials

① Union, Connector② Elbow, Tee, Cross, MFT③ AL Alloy : LOCUS Tube Fittings, AL Coated Tube

②

③

①

Tubing

◊ LOCUS tube fitting is able to assemble andconnect with Copper tube and AL Coated tubeby a simple wrench.

◊ AL Coted Tube is light and easily bendable. It isable to easily install by beginners.

◊ The Tubing must be softer than the fittingmaterials.

◊ For non-leak installation, the tubing surfacefinish must be smooth and free from scratches,draw mark, dirt, dust and burr.

◊ Tubing in oval or out-of-roundness may not fitinto fitting.

◊ A weathering test for PA Coating is satisfied thestandard according to ISO 4892. If you want toinstall AL coated tubes as exposed tube outside,contact Locus.

◊ Do Not force the tubing into the fitting ; it maydamage the fitting sealing system on nut, linkand body.

◊ Do Not thread, weld, flare on AL Coated Tube.

Table 2. Thread Specification

Thread type(End connection)

Reference Specification

Unified(LOCUS Tube fittings)

ASME B1.1

NPTASME B1.20.1,SAE AS71051

PT (Tapered) ISO 7, BS EN 10226-1

PF (Parallel) ISO 228, JIS B0202

Thread Specification

◊ The End connection of Connector can bechosen the Thread Specification.

Temperature Rating

◊ AL Alloy Coated Tube

and fittings

◊ Brass

◊ 316 Stainless Steel

-50℃ to 150℃(-122℉ to 302℉)

-54℃ to 204℃(-65℉ to 400℉)

-245℃ to 649℃(-425℉ to 1200℉)

Aluminum Alloy

PA Coating

AL Coated Tubing

◊ Seamless Aluminum Alloy Coated tubing isASTM B211.

Table 3. AL Coated Tube Specification

Size O.D W.T

(in.) (Ф, mm) (t)

1/4” 6.60 0.84

3/8” 9.80 0.87

1/2” 13.00 1.00

5/8” 16.25 1.10

3/4” 19.30 1.35

LOCUS Tube Fittings

4

Tube Selection and Handling

LOCUS tube fittings perform best for creating agood quality-tubing. Tubing should be considereda fitting component.Here are some points to be considered.

◊ Materials and manufacturing method◊ Material Hardness◊ Surface finish◊ Outside diameter and its tolerance◊ Ovality◊ Concentricity

To avoid damage to the tubing surface, AL Coatedtube and Copper tube must not be crushed or loseits circularity. If necessary, cut the end of tubingwhich is not round shape, and then remove burrand install the Locus tube fitting

Tube Application

The pressure rating of LOCUS tube fitting is ratedto the working pressure of connective tubing.

Material◊ Using material is essential for leak-free sealing

system◊ Eco-Friendly◊ Non Potential difference corrosion

Gas Application◊ Usable a wide range of leak-free application

including gas leak proof and vacuum tightservice.

◊ It’s dangerous to use Chloroform(CHCl3),Transformer Oil, Brake Fluid tube line as the ALCoated tube.

Vacuum Application◊ LOCUS tube fitting have been proved to be

excellent vacuum tight seal in manyapplications including analytical industry.

High Pressure Application◊ Pressure 500 psig (34.5 bar) or higher is

considered generally high pressure. In the highpressure system scratch, draw mark, nick, flatspots, and dirt on tubing may cause leakage.

◊ More than the higher 725 psig (50bar) ofworking pressure is different to the wallthickness of AL Coated tube. If necessaryContact us.


Copper Tubing

◊ Soft annealed seamless copper tubing is ASTMB 75

◊ Soft annealed seamless water copper tubing isASTM B88 (type K or type L)

Table 4. Copper Tube Specification

Size Tube O.D.

(in.) (Ф, mm)

1/4” 6.35

3/8” 9.52

1/2” 12.70

5/8” 15.88

3/4” 19.05

LOCUS Tube Fittings

5

Pressure Ratings

LOCUS tube Fittings are rated to maximum working pressure of tubing and recommended in accordance withthe table 5 to 6.

Table 5. Seamless AL Coted Tubing

ODin.

Wall Thickness (in.)

0.033 0.034 0.039 0.043 0.053 0.055 0.061

1/4” 3,480 Working Pressure in PSIG

3/8” 2,320

1/2” 2,030 2,176

5/8” 1,740 2,176

3/4” 1,885 2,176

Table 6. Seamless Copper Tubing

ODin.

Wall Thickness (in.)

0.012 0.028 0.035 0.049 0.065 0.083 0.095 0.109

1/4” 1,321 1,696 2,565 3,639 Working Pressure in PSIG

3/8” 1,093 1,623 2,251

1/2” 806 1,187 1,630 2,160

5/8” 935 1,277 1,681 1,970

3/4” 748 1,017 1,332 1,555 1,823

◊ High quality seamless AL coated tube to ASTM B221M or equivalent.

◊ High quality soft annealed seamless copper tube to ASTM B75 and ASTM B88 or equivalent.◊ Based on minimum wall thickness and maximum O.D allowable by ASTM B75.


LOCUS Tube Fittings

6

Ordering Information

LOCUS Tube Fittings

L B- C - PA

C Thread Type (Connector Body)

N =R =G =

NPTPTPF

A Fitting Type

MC =FC =U =

UR =E =T =X =

MFT =ST =AT =N =

Male ConnectorFemale ConnectorUnionReducing UnionElbowTeeCrossMulti Flow TubeSpiral TubeAL Coated TubeNut with tube guide

B Size

4 =6 =8 =

10 =12 =

1/4”3/8”1/2”5/8”3/4”

Tee & Cross Fittings & MFT

Tee Or Cross

MFT

②

③

④

①

②

③

①

◊ ContactLOCUSforinformationabouttheadditionalsizesandthreadtype.

LOCUS Tube Fittings

7

LOCUS Tube Fittings

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) T

(NPT)A

Width across flat(mm) L

(mm)D d H h

LMC 4- 4N 1/4” 4.90 1/4” 21.4 17 17 41.4

LMC 6- 6N 3/8” 7.80 3/8” 21.7 22 22 46.7

LMC 8- 8N 1/2” 11.00 1/2” 23.9 24 24 50.7

LMC 10- 10N 5/8” 13.60 5/8” 25.3 27 27 51.3

LMC 12- 12N 3/4” 16.50 3/4” 28.9 32 32 58.3

Male Connector

Connects fractional tube to Female NPT Thread

Male Connector

Connects fractional tube to Female ISO Tapered Thread

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) T

(PT)A


(mm)D d H h

LMC 4- 4R 1/4” 4.90 1/4” 21.4 17 17 41.4

LMC 6- 6R 3/8” 7.80 3/8” 21.7 22 22 46.7

LMC 8- 8R 1/2” 11.00 1/2” 23.9 24 24 50.7

LMC 10- 10R 5/8” 13.60 5/8” 25.3 27 27 51.3

LMC 12- 12R 3/4” 16.50 3/4” 28.9 32 32 58.3

H

H

LOCUS Tube Fittings

8

LOCUS Tube Fittings

Female Connector

Connects fractional tube to Male NPT Thread

Female Connector

Connects fractional tube to Male ISO Tapered Thread

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) T

(NPT)A


(mm)D d H h

LFC 4-4N 1/4” 4.90 1/4” 21.4 17 17 36.1

LFC 6-6N 3/8” 7.80 3/8” 21.7 22 22 39.7

LFC 8-8N 1/2” 11.00 1/2” 23.9 24 24 44.5

LFC 10-10N 5/8” 13.60 5/8” 25.3 27 27 45.0

LFC 12-12N 3/4” 16.50 3/4” 28.9 32 32 51.7

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) T

(PT)A


(mm)D d H h

LFC 4-4R 1/4” 4.90 1/4” 21.4 17 17 36.1

LFC 6-6R 3/8” 7.80 3/8” 21.7 22 22 39.7

LFC 8-8R 1/2” 11.00 1/2” 23.9 24 24 44.5

LFC 10-10R 5/8” 13.60 5/8” 25.3 27 27 45.0

LFC 12-12R 3/4” 16.50 3/4” 28.9 32 32 51.7

H

H

LOCUS Tube Fittings

9

LOCUS Tube Fittings

Female Connector

Connects fractional tube to Male PF Thread

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) T

(PF)A


(mm)D d H h

LFC 4- 4G 1/4” 4.90 1/4” 21.4 17 17 26.3

LFC 6- 6G 3/8” 7.80 3/8” 21.7 22 22 26.6

LFC 8- 8G 1/2” 11.00 1/2” 23.9 24 24 31.6

LFC 10- 10G 5/8” 13.60 5/8” 25.3 27 27 32.9

LFC 12- 12G 3/4” 16.50 3/4” 28.9 32 32 40.1

H

LOCUS Tube Fittings

10

LOCUS Tube Fittings

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) A1 A2


(mm)

D1 D2 d1 H1 H2 h

LUR 4-6 1/4” 3/8” 4.9 21.4 21.7 17 22 22 52.4

LUR 6-8 3/8” 1/2” 7.8 21.7 23.9 22 24 24 54.3

LUR 8-10 1/2” 5/8” 11.0 23.9 25.3 24 27 27 54.9

LUR 10-12 5/8” 3/4” 13.6 25.3 28.9 27 32 32 58.6

Reducing Union

Connects fractional tubes

Union


Part No.

Tube O.D(in.)

I.D Min(Ф,mm) A


(mm)D d H h

LU- 4 1/4” 4.90 21.4 17 17 50.5

LU- 6 3/8” 7.80 21.7 22 22 54.4

LU- 8 1/2” 11.00 23.9 24 24 53.2

LU- 10 5/8” 13.60 25.3 27 27 55.6

LU- 12 3/4” 16.50 28.9 32 32 60.6

H

dD

L

h

H1

d1

D1

L

H2

A2A1

D2

hh

LOCUS Tube Fittings

11

LOCUS Tube Fittings

Union Elbow

Union Tee

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) A


(mm)D d H h

LE- 4 1/4” 5 21.4 17 17 49.3

LE- 6 3/8” 8 21.7 22 22 57.3

LE- 8 1/2” 11 23.9 24 24 59.5

LE- 10 5/8” 14 25.3 27 27 64.1

LE- 12 3/4” 17 28.9 32 32 71.8


Part No.

Tube O.D(in.)

I.D Min(Ф,mm) A


(mm)L1

(mm)D d H h

LT- 4 1/4” 5 21.4 17 17 81.2 49.3

LT- 6 3/8” 8 21.7 22 22 91.2 57.3

LT- 8 1/2” 11 23.9 24 24 93.3 56.5

LT- 10 5/8” 14 25.3 27 27 99.0 64.1

LT- 12 3/4” 17 28.9 32 32 108.2 71.8


H

d

L

h

H

LOCUS Tube Fittings

12

LOCUS Tube Fittings

Union Cross

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) A


(mm)D d H h

LX 4 1/4” 5 21.4 17 17 81.2

LX- 6 3/8” 8 21.7 22 22 91.2

LX- 8 1/2” 11 23.9 24 24 93.3

LX- 10 5/8” 14 25.3 27 27 99.0

LX- 12 3/4” 17 28.9 32 32 108.2


H

LOCUS Tube Fittings

13

LOCUS Tube Fittings

Multi Flow Tube

Spiral Tube

◊ ContactLOCUSforinformationabouttheadditionalsizesandthelength.

Part No.

Tube O.D

(in.)

I.D Min(Ф,mm) A


(mm)L1

(mm)

D d H h

LMFT - 4 1/4” 5 21.4 17 22 130.2 71.0

LMFT - 6 3/8” 8 21.7 22 22 130.2 73.0

LMFT - 8 1/2” 11 23.9 24 24 132.6 76.9

LMFT - 10 5/8” 14 25.3 27 27 136.0 80.3

LMFT – 12 3/4” 17 28.9 32 32 147.2 91.7

Part No.

Tube O.D(in.)

I.D Min(Ф,mm) A


(mm)D d H h

LST- 4 1/4” 4.90 21.4 17 17 275.4

LST- 6 3/8” 7.80 21.7 22 22 283.8

LST- 8 1/2” 11.00 23.9 24 24 287.4

LST- 10 5/8” 14.00 25.3 27 27 290.4



H

H

LOCUS Tube Fittings

14

LOCUS Tube Fittings

Nut with Tube guide

Connects fractional tubes, MFT, ST

Part No.

Tube O.D(in.)

Width across flat

(mm)

D H

LN - 4 1/4” 17

LN - 6 3/8” 22

LN - 8 1/2” 24

LN - 10 5/8” 27

LN - 12 3/4” 32

LOCUS Tube Fittings

15


Safety Precautions

◊ Do not assemble or tighten fittings whensystem is pressurized.

◊ Do not mix materials or fitting componentsfrom various manufacturer - tubing, ferrules,nuts, and fitting bodies.

Table 7. The Protrusion Length (A)

IMG Tube O.D 1/4” 3/8” 1/2” 5/8” 3/4”

Length (mm)

(A ± 0.2)7.9 9.7 9.8 10.4 10.8

Tube Preparation

◊ Check if tubing O.D., wall thickness, ovality,hardness and their tolerances are within specsfor your application.

◊ Surface finish is very important to propersealing. Tubing with any kind of depression,scratch, raised portion, or other surface defectwill be difficult to seal, particularly in gasservice.

◊ Tubing that is oval and will not easily fit throughfitting nuts, links, and bodies should never beforced into the fitting.

Table 9. Tightening Torque Value (kgf·㎠)

1/4” 3/8” 1/2” 5/8” 3/4”

120~150 150~180 180~250 250~300 300~350

LOCUS Fitting Precautions

◊ ONLY SINGLE-USE. DO NOT REUSABLE.◊ Do Not disassemble the nut from tube guide prior.◊ Do Not force the tubing into the fitting◊ Do Not move the link where the protrusion

length(A) is automatically fixed when insertingthe tube ; it may damage the sealing system.

◊ Tighten the nut with wrench until there is nogap between the fitting body and nut. (Blue O-ring is invisible) ; If no gap, there arecompletely adhered to and cannot be tightenedwith a wrench anymore.

◊ Tightening Torque Value is according to table 9.

Tube Installation

◊ In case tube bend is too close to a fitting, thebend section shall enter the fitting. This maynot allow the tube to be bottomed in the fitting,resulting in leaks.

◊ Keep the proper straight length of tube asshown in the table.

◊ Do Not bend a tube in the fitting. Use tubebender prior to installation onto fitting.

Fractional tube

T L (mm)

1/4” 42

3/8” 42

1/2” 44

5/8” 45

3/4” 49

T : Tube O.D.R : RadiusL : Straight tube length

A

Table 8. Installation Example (about the NO GAP)

CORRECT WRONG

NUT

O-ring

BODY

No Gap

L

No GapGap

(Blue O-ring visible)

LOCUS Tube Fittings

16


MALE CONNECTOR

◊ Until there is no gap between the fitting body and nut.(Blue O-ring is invisible)

Step 3. Tighten the nut with a wrench

After charging Nitrogen, test for any leakage by using leaktester or soapy water.

Step 4. Leak test

◊ After than Assemble the mechanical part and fittinghand-tight

Step 2. Assemble body and nut hand-tight

FEMALE CONNECTOR

Fully insert the tube into the nut until releasedautomatically from the tube guide.

Step 1. Insert the tube into Tube Guide

Tube Guide

No Gap



Tube Guide




Step 4. Leak test

◊ After than Assemble the mechanical part and fittinghand-tight


No Gap

LOCUS Tube Fittings

17


UNION




Step 4. Leak test


REDUCING UNION



Tube Guide

No Gap



Tube Guide




Step 4. Leak test


No Gap

LOCUS Tube Fittings

18


ELBOW




Step 4. Leak test


TEE



Tube Guide



Tube Guide




Step 4. Leak test


No GapNo Gap

LOCUS Tube Fittings

19


CROSS




Step 4. Leak testStep 2. Assemble body and nut hand-tight



Tube Guide

No Gap

LOCUS Tube Fittings

20


Multi Flow Tube




Step 4. Leak test


Spiral Tube



Tube Guide



Tube Guide





No Gap

Step 4. Leak test

No Gap

LOCUS CO.,LTDB-1, 41, Noksansandan261-ro 74beon-gil, Gangseo-gu, Busan, South Korea 46754Tel. +82-51-832-2042,4 Fax. +82-507-707-7158

LOCUS CO Ltd. All rightreserved. Thisproductordocumentis protectedbycopyrightand distributedunderlicensesrestrictingits use,copying, distribution, and decompilation. No partof thisproductordocumentmaybe reproducedin anyformbyanymeanswithoutpriorwritten authorizationof LOCUS, if any.

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ALUMINUM ALLOY INDUSTRIAL GAS TUBE FITTINGS