
3
ART 26 & ART 27 Commissioning Set Rev 1
WhereKv&Kvs=owcoefcient(m3/hrat1bardifferential)
Q-Flowrate(l/s)
ΔP-Headlossattributabletovalve(kPa)
ΔPs-Differentialpressureacrosstapping’s(signal)(kPa)
Kvs Values ART 26 and ART 27
Size ½”
UUL
½
ULL ½”UL ½” L ½” M ½” ¾” 1” 1 ¼” 1 ½” 2”
Kvs 0.10 0.17 0.23 0.47 0.98 1.80 4.06 7.45 16.63 23.00 47.50
Kvs Values ART 26 and ART 27 PRS
Size DN15 DN20 DN25 DN32 DN40 DN50
Kvs 1.80 4.06 7.45 16.63 23.00 47.50
Pressure Loss
The pressure loss across a metering station is less than signal differential pressure indicated on
theowcharts.Thepressurelossisobtainedbymultiplyingthepressuresignalbythepressure
recovery factors given in the table.
Thisappliestowhenthemeteringstationisusedinastand-aloneapplicationorclosecoupledto
a double regulating valve.
ThepressurelossesfortheART26doubleregulatingvalvesaregivenontheindividualow
chartsalongwiththecorrespondingKvvaluesatthevariouspositionsopen.
3. Valve Features
• TheART26&ART27DZRCommissioningSetisusedforbalancingtheowinheating,
coolinganddomesticwatersystems.
• TheART26&ART27DZRCommissioningSethasaowaccuracyof+/-5%ow
accuracy.
• TheART26&ART27DZRCommissioningSetisttedwith2testpoints.
• Digitalscalewithlockfunction.
• Madeof“DZR”(DezincicationResistant)brass.
• ThisarticleismadeincompliancewiththequalitymanagementrequirementsofISO9001
standard.
• AllarticlesaretestedinaccordancewiththeEN12266-1standard.
• Itcanbeusedinawidevarietyofsectors:heating,airconditioning,water,sanitary
systemsandgenerallywithanynon-corrosiveliquid.