Flow Data.................................................................... 4 to 11
Influence of Coolants on Flow Values..............................12
Correction Factor f ...........................................................12
Design
The Kombi-2-plus valve consists of:
•
Valve body with pressure test cocks and internal threads
DN10...DN20 to DIN2999 (ISO7) for threaded pipe or copper and precision steel pipe 10...20 mm (see Accessories),
or
•
Valve body DN25...DN80 with pressure test cocks and
internal threads to DIN2999 (ISO7) for threaded pipe
•
Valve insert
•
Blue handwheel with pre-setting dial and display
Materials
•
Valve housing made of red bronze
•
Valve insert and pressure test cocks made of brass
•
O-rings and soft seals made of EPDM
•
Handwheel, pre-setting dial and display made of plastic
Application
The Kombi-2-plus is installed in the return mains of pump
driven warm water heating systems and cold water cooling
systems to regulate the hydronic balance and as shutoff
valve. The Kombi-2-plus has an O-ring spindle seal and is
maintenance free. The valve body can be insulated easily
and is equipped with pressure test cocks for differential pressure or flow measurement.
Further functions can be retrofitted without interrupting operation of the system: draining, filling and automatic regulation
(in combination with a Kombi-3-plus BLACK valve in the supply and a Kombi-Diaphragm Unit).
Features
• Maintenance free spindle with double O-ring sealings
• PTFE seat sealing
• High accuracy of the pre-setting because of individual
adjustment
• Valve body PN16
• Dimensions DN15 to DN40 can be retrofitted with a
Kombi-Diaphragm Unit
• Robust valve body made of corrosion resistant red
bronze
• Availabe in sizes up to DN80
• Visible pre-setting dial with concealed pre-setting
Medium
Operating temperature
Operating pressure
Differential pressure
vs
(cv)-values
k
NOTE: Differential pressure: Closing pressure for
Kombi-2-plus with installed Kombi-Diaphragm Unit.
Regarding noise generation the conditions, requirements and installation design have to be taken into
account.
Water, water-glycole mixture
2...130°C (36...266°F)
max. 16 bar (232 psi)
max. 2,0 bar (29 psi) –
see NOTE below
see table on page 2
Dimensions, kvs-values and Ordering Information
Function
The hydronic balance is a significant requirement for the
efficient operation of a hydronic heating or cooling installation.
In an unbalanced system under or over provision of hot water
to individual radiators or circuits can occur. Apart from the
correct selection of radiator valves, regulation of individual
circuits is also necessary and in some cases, such as in
DIN 18 380, VOB part C, is required by national standards.
This requirement is met with the shutoff and balancing valve
Kombi-2-plus. The Kombi-2-plus for the return has the functions shutoff, pre-setting, regulation (with diaphragm unit,
accessory), draining and filling (draining adapter, accessory).
Honeywell AG • All rights reserved11EN0H-0048GE25 R0402
KOMBI-2-PLUS (V5032)
Influence of Coolants on Fl ow Va lue s
The flow through a valve is defined by the kv-value. The kv-value is the flow m through a valve in [m³/h] at a differential pressure
of 1 bar (14,5 psi) and is only valid for fluids with a density of σ0 = 1000 kg/m³. This condition is met by water at a temperature of
20°C (68°F). For fluids with another density the following formula can be applied:
Kv
Medium
m
=
p
∆
ρ
Medium
×
ρ
0
Correction Factor f
When the density σ is expressed in t/m³ instead of kg/m³ the correction factor f is the result. The correction factor f can be used
to re-calculate kv-value, pressure drop and flow:
KvKv
Medium
Medium
Normal water100%1,0000,9980,9940,9880,9810,972
Ethylen glycol70%1,0521,0471,0411,0331,0241,015
e.g. Antifrogen N50%1,0861,0791,0701,0611,0521,042
Propylen glycol70%1,0351,0291,0211,0121,0020,991
e.g. Antifrogen L50%1,0531,0441,0351,0251,0141,002
0
f
Table 1. Values for correction factor f
water part5°C (41°F)20°C (68°F)35°C (95°F)50°C (122°F) 65°C (149°F) 80°C (176°F)
Medium
fpp
×∆=∆
0
Correction factor f
Medium
mm
1
×=
1
×=
0
f
Control Products
Honeywell AGPhone: (49) 2932 9880
Zu den Ruhrwiesen 3Fax: (49) 2932 988239
D-59755 Arnsberg-Neheimmng@honeywell.comhttp://europe.hbc.honeywell.com
EN0H-0048GE25 R040212Subject to change • All rights reserved
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