technical data and ordering informati on
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www.protect-air.comwww.protect-air.com
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
1/4" Standardapprox.
600 Ltrs./Min (21scfm/Min)
49 59 - 22 40 Male Female 281A0221 281A1221
1/4" Low Flowapprox.
200 Ltrs./Min (7scfm/Min)
49 - - 22 33 Female Female 281Z0211-7-200 281Z1211-7-200
1/4" Low Flowapprox.
200 Ltrs./Min (7scfm/Min)
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
1/4" HighFlowapprox.
900 Ltrs./Min (31,8scfm/
Min)49 59 - 22 40 Male Female 281Z0221-7-900 281Z1221-7-900
3/8" Standardapprox.
1000 Ltrs./Min (35,3scfm/
Min)58 - - 27 60 Female Female 281A0311 281A1311
3/8" Standardapprox.
1000 Ltrs./Min (35,3scfm/
Min)58 70 - 27 67 Male Female 281A0321 281A1321
1/2" Standardapprox.
2500 Ltrs./Min (88,3scfm/
Min)65 - - 30 77 Female Female 281A0411 281A1411
1/2" Standardapprox.
2500 Ltrs./Min (88,3scfm/
Min)65 79 - 30 84 Male Female 281A0421 281A1421
3/4" Standardapprox.
3800 Ltrs./Min (134,3scfm/
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
2"at 15 bar /213 psig:
approx.25.000Ltrs./Min (883scfm/
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.
12
www.protect-air.com
a brand of tri-matic
www.protect-air.com
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
1/4" Standardapprox.
600 Ltrs./Min (21scfm/Min)
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*
1/4" Standardapprox.
600 Ltrs./Min (21scfm/Min)
Male Female 281R0221*
1/4" Low Flowapprox.
200 Ltrs./Min (7scfm/Min)
Female Female 281RZ0211-7-200*
1/4" Low Flowapprox.
200 Ltrs./Min (7scfm/Min)
Male Female 281RZ0221-7-200*
1/4" HighFlowapprox.
900 Ltrs./Min (31,8scfm/
Min)Female Female 281RZ0211-
7-900*
1/4" HighFlowapprox.
900 Ltrs./Min (31,8scfm/
Min)Male Female 281RZ0221-
7-900*
3/8" Standardapprox.
1000 Ltrs./Min (35,3scfm/
Min)Female Female 281R0311*
3/8" Standardapprox.
1000 Ltrs./Min (35,3scfm/
Min)Male Female 281R0321*
1/2" Standardapprox.
2500 Ltrs./Min (88,3scfm/
Min)Female Female 281R0411*
1/2" Standardapprox.
2500 Ltrs./Min (88,3scfm/
Min)Male Female 281R0421*
3/4" Standardapprox.
3800 Ltrs./Min (134,3scfm/
Min)
-40°C to 120°C
(-31°F to 248°F)
Housing: StainlessSteel316 L
Female Female 281R0511*
3/4" HighFlowforCompressors
approx.5000 Ltrs./Min (176,7scfm/
Min)Female Female 281RZ0511-
7-5000*
1"at 15 bar /213 psig:
approx.12.000Ltrs./Min (424scfm/
Min)45bar500psig
Female Female 281R0611*
2"at 15 bar /213 psig:
approx.25.000Ltrs./Min (883scfm/
Min)
Female Female 281R0911*
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.
13
www.protect-air.comwww.protect-air.com
a brand of tri-matic
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]
Flow rate for closing V [Nl/min]
p1 Dp T V
(barü) (bar) (K) (Nl/min)
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
14
www.protect-air.com
a brand of tri-matic
www.protect-air.com
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]
Flow rate for closing V [Nl/min]
p1 Dp T V
(barü) (bar) (K) (Nl/min)
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
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
(barü) (bar) (K) (Nl/min)
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
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]
Flow rate for closing V [Nl/min]
p1 Dp T V
(barü) (bar) (K) (Nl/min)
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
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]
Flow rate for closing V [Nl/min]
p1 Dp T V
(barü) (bar) (K) (Nl/min)
6 0.20 bar 287 3533
5 0.20 bar 287 3200
4 0.21 bar 287 2840
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