24
Valvesandvalve terminals– tips
• Combinevalvesizes correctlyon thevalve
terminal.
• Keep thenumber of connections/fittingsas low
aspossible: valvesonmanifoldblocks, or in
general onvalve terminals, reducepotential leak-
ages.
• Usevalveswhosesolenoidsareactuatedwith
reducedholding current.
• Givepreference todecentralised installations:
less compressedair consumption thanks to
reduced tubing lengths. Seegraphicbelow.
Thegraphshows the influenceof different tubing lengthsand tubingdiameters
on compressedair consumption. Thissample calculation isbasedon10 clamp-
ing cylinders inautomotiveproductionat 1500 cyclesaday.
Annual compressedair consumption [Nm³]
for 10 clamping cylinders, 1500 cyclesperday
40,000
35,000
30,000
25,000
20,000
15,000
10,000
5,000
0
Compressedair consumption [Nm³]
Ø6x1 Ø8x1.25 Ø10x1.5 Ø6x1 Ø8x1.25 Ø10x1.5 Ø6x1 Ø8x1.25 Ø10x1.5
L=15m
L=8m
L=3m
€200/year
€230/year
In thefieldof pneumatics, valves functionasswitchingand control components. Thedrives connected to them
canonlybeoperatedefficiently if thevalvesare correctlysizedandactuated.
m
m
I
P
6
2
8
4
bar/psi
• Use reversibleoperation: pressure regulators
upstreamof thevalvesallowexhaust air to
escape from the cylinderwithout resistance. It
doesn’t have tobeexhaustedby the regulator.
• Createdifferent pressure zones invalve terminals
inorder tosaveenergy.
• Usemodernproportional valveswithpilot control
basedonpiezovalve technology to control pres-
sure levelsandflow rates. This reducesenergy
consumption considerably.
