Technical Data and Ordering Informati on

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a brand of tri-matic

HoseGuard®

Threadconnec-

ti onDesripti on Closing Point

Dimensions (mm) Weight(g)

MaximumInlet

Pressure

P1inlet

Thread

P1outlet Thread

Order Code

A B Dia-meter C

AcrossFlat BSP NPT

BSP/NPT HoseGuard®Air Fuse:Standard

Aluminium:at 7 bar /100 psig

1/4" Standardapprox.

600 Ltrs./Min (21scfm/Min)

49 - - 22 33

18bar255psig

Female Female 281A0211 281A1211



49 59 - 22 40 Male Female 281A0221 281A1221

1/4" Low Flowapprox.


49 - - 22 33 Female Female 281Z0211-7-200 281Z1211-7-200



49 59 - 22 40 Male Female 281Z0221-7-200 281Z1221-7-200

1/4" HighFlowapprox.

900 Ltrs./Min (31,8scfm/

Min)49 - - 22 33 Female Female 281Z0211-7-900 281Z1211-7-900



Min)49 59 - 22 40 Male Female 281Z0221-7-900 281Z1221-7-900



Min)58 - - 27 60 Female Female 281A0311 281A1311



Min)58 70 - 27 67 Male Female 281A0321 281A1321



Min)65 - - 30 77 Female Female 281A0411 281A1411



Min)65 79 - 30 84 Male Female 281A0421 281A1421



Min)76 - 36 30 107 Female Female 281A0511 281A1511

3/4" HighFlowforCompressors

approx.5000 Ltrs./Min (176,7scfm/

Min)76 - 36 30 107 Female Female 281Z0511-7-5000 281Z1511-7-5000

1"at 15 bar /213 psig:

approx.12.000Ltrs./Min (424scfm/

Min)

100 - 50 41 320

35bar500psig

Female Female 281A0611 281A1611



Min)

130 - 80 70 830 Female Female 281A0911 281A1911

at 25 bar /355 psig:

approx.47.000Ltrs./Min

(1661scfm/Min)

on request

Technical Data andOrdering Informati on

Technical dataPressure Drop Open: 0,05-0,1bar0,7-1,5psig)Pressure Drop By Closing: 0,3bar(4psig)Temperature range 1/4", 3/8", 1/2": -20°C to 80°C (-4°F to 176°F) 3/4", 1", 2": -20°C to 120°C (-4°F to 248°F)Material Housing: AluminiumOther Parts: Nitrile Rubber, Plasti c, Stainless Steel

TheHoseGuardofferssimplebuteffec�veprotec�onstopneuma�csystemsintheeventofabrokencompressedairhoseorpipe.TheairsupplyisimmediatelyshutoffbytheHoseGuard,shouldthevolumeofairexceedasetvalue.This"value"isfactorypresetandissettoallownormalairconsup�onwhenusingairtools.Shouldtheairconsump�onexceedthesetvalue,e.g.theairlineissevered,thentheinternalpistoninstantlyshutsoffthemainflow.Anintegralbleedholeallowssomeairtoflowthough.Thisenablesthelinepressuretoautoma�callyresettheHoseGuardoncethemainbreakisrepaired.

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HoseGuard® – Stainless SteelThreadconnec-

ti onDesripti on Closing Point

Pressure Drop Dimensions (mm) Weight(g)

Maxi-mumInlet

Pressure

Tem-perature

rangeMaterial

P1inlet

Thread

P1outlet Thread

Order Code

Open Byclosing A B Dia-

meter CAcross

Flat BSP

BSP/NPT HoseGuard®Air Fuse:

StainlessSteel - 316 L:Available on request, only

at 7 bar /100 psig Alldimensionsonrequest



0,05-0,1bar(0,7-1,5psig)

0,3bar(4psig)

18bar255psig

-40°C to80°C

(-31°F to 176°F)

Housing: StainlessSteelDIN17440MaterialNo.

1.4404

Female Female 281R0211*



Male Female 281R0221*



Female Female 281RZ0211-7-200*



Male Female 281RZ0221-7-200*



Min)Female Female 281RZ0211-

7-900*



Min)Male Female 281RZ0221-

7-900*



Min)Female Female 281R0311*



Min)Male Female 281R0321*



Min)Female Female 281R0411*



Min)Male Female 281R0421*



Min)

-40°C to 120°C

(-31°F to 248°F)

Housing: StainlessSteel316 L


3/4" HighFlowforCompressors

approx.5000 Ltrs./Min (176,7scfm/

Min)Female Female 281RZ0511-

7-5000*



Min)45bar500psig




Min)


at 25 bar /355 psig:

approx.47.000Ltrs./Min

(1661scfm/Min)

on request

Technical Data andOrdering Informati on

*Stainless Steel – all dimensions on request

Pistheinlet. Theairpassesthepiston1andcon�nuesthroughtheseat. Theairflow,passingthepiston,issloweddownbymeansofsomelengthwisegrooves3ontheoutersideofthepiston. If the flow is too high, the air cannot pass thepiston quickly enough, and the piston will bepressedagainstthespring2towardstheseat.Theclosingpoint is shown in the table above. If thevalue indicated isexceeded,e.g. if thehosesud-denlybreaks,theairsupply isautoma�callyshutoff.

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All the following measurement values (fl ow for closing functi on) apply for a HoseGuard® (hose breakagesafetydevice)chargedwiththeappropriatepressureP1andwithafreePaoutlet.If a component is fi tt ed aft er the HoseGuard® which reduces the fl ow performance (e.g. linkage, screwfi�ng,hoseetc.),itispossiblethattherequiredflowforthede-finedclosingpointisnolonger att ained and that the HoseGuard® will not close.Inthiscasetheapplica�onmustbeappropriatelytested.Itispossiblethatanothercomponentmay have to be selected aft er the HoseGuard®, or a smaller HoseGuard®, depending on the test result.

HoseGuard 1/4’’ Flow measurement according to DIN EN 60534 Air fl ow rate for closing

Air fl ow rate for closing

0

2

4

6

8

10

12

14

16

0 200 400 600 800 1000

Pre

ssur

e p1

[bar

ü]

Flow rate for closing V [Nl/min]

p1 Dp T V

(barü) (bar) (K) (Nl/min)

15 0.24 bar 287 853

10 0.24 bar 287 724

6 0.23 bar 288 597

5 0.23 bar 288 547

4 0.23 bar 288 505

HoseGuard 3/8’’ Flow measurement according to DIN EN 60534 Air fl ow rate for closing Air fl ow rate for closing

0

1

2

3

4

5

6

7

0 2000 4000 6000 8000 10000 12000

Pre

ssur

e p1

[bar

ü]


p1 Dp T V


15 0.2 bar 287 1824

10 0.21 bar 287 1539

6 0.22 bar 288 1207

5 0.21 bar 288 1120

4 0.21 bar 288 1020

p1: Stati c pressure in front of safety device ∆p: Pressure diff erence via safety device T: Temperature V: Flow rate for closing the safety device under standard conditi ons (1,01325 bara, 0°C)

Important Informati on

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HoseGuard 1/2’’ Flow measurement according to DIN EN 60534 Air fl ow rate for closing Air fl ow rate for closing

0

1

2

3

4

5

6

7

3600 3800 4000 4200 4400 4600 4800

Pres

sure

p1

[bar

ü]


p1 Dp T V


15 0.41 bar 287 4230

10 0.42 bar 287 3510

6 0.44 bar 288 2800

5 0.44 bar 288 2530

4 0.42 bar 288 2220

HoseGuard 2’’ Flow measurement according to DIN EN 60534 Air fl ow rate for closing


0

1

2

3

4

5

6

7

0 2000 4000 6000 8000 10000 12000

Pre

ssur

e p1

[bar

ü]

Flow rare for closing V [Nl/min]

p1 Dp T V


6 0.13 bar 277 11360

5 0.13 bar 275 10320

4 0.13 bar 272 9290

HoseGuard 1’’ Flow measurement according to DIN EN 60534 Air fl ow rate for closing


0

1

2

3

4

5

6

7

0 1000 2000 3000 4000 5000

Pres

sure

p1

[bar

ü]


p1 Dp T V


6 0.17 bar 286 4570

5 0.17 bar 286 4230

4 0.17 bar 286 3830

HoseGuard 3/4’’ Flow measurement according to DIN EN 60534 Air fl ow rate for closing


0

1

2

3

4

5

6

7

0 2000 4000 6000 8000 10000 12000

Pres

sure

p1

[bar

ü]


p1 Dp T V


6 0.20 bar 287 3533

5 0.20 bar 287 3200

4 0.21 bar 287 2840

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Technical Data and Ordering Informati on

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