Alwa-Kombi-4 with internal threads
Construction
The Alwa-Kombi-4 valve consists of:
• Valve housing in straight pattern with internal threads to ISO 7
(DIN 2999) or external threads according to DIN ISO 228
•Valve insert
• Handwheel with digital display of pre-setting
• Thermal actuator (accessory)
• Pipe connections (accessory)
Materials
• Valve housing made of red bronze
•Valve insert made of red bronze and brass
•EPDM O-rings
• PTFE seat sealing
• Handwheel, pre-setting dial and display made of plastic,
orange
V1810
Alwa-Kombi-4
Circulation throttle valve
Product specification sheet
Application
The Alwa-Kombi-4 is used as throttle valve for hydronic balancing
of warm potable water circulation systems.
To achieve a hydronic balance the flow in the circulation pipe is
throttled by manually pre-setting the valve. The valve can also be
equipped with a thermal actuator which allows a regulation of the
water temperature in the circulation system to the exact degree.
The thermal actuator can be installed without interruption of the
warm water supply.
When the thermal actuator 50 - 60 °C (122 - 140 °F) is used, a
thermal disinfection according to DVGW worksheet W551 and
W553 is supported. Hydronic balance is also retained during the
thermal disinfection process to ensure disinfection of all pipelines
and risers.
Special Features
• Meets KTW requirements
• For regulation according to DVGW worksheets W551 and
W553
• Valve housing and all parts with flow-contact made of corrosion-resistant red bronze
• Retrofittable automatic temperature-control with support of
thermal disinfection
• Draining option with retrofittable and removable draining
adapter
• No additional side connections to valve housing
• Cavity-free cartridge with maintenance-free spindle sealing
• Spindle thread is isolated from the flow
• Seat sealing made of PTFE
• Visible, digital pre-setting dial with concealed pre-setting
handwheel
• High accuracy due to factory calibration to every single valve
Technical Data
Medium Water
Operating temperature max. 130 °C
Operating pressure max. 16 bar
k
-value DN 15
vs
DN 20
DN 25
DN 32 und DN 40
2.7
6.4
6.8
16.0
EN0H-1805GE23 R0307 • Subject to change
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V1810 Alwa-Kombi-4
Method of Operation
As throttle valve the Alwa-Kombi-4 limits the flow through the
circulation pipe. This is achieved either by manually closing the
valve to a certain position or automatically, when the valve is
equipped with a thermal actuator.
Manual pre-setting: the valve is pre-set according to a calculated
value and stays in that position. The flow of the water is limited
by the narrowed valve opening.
Automatic regulation: the valve is equipped with a thermal
actuator and pre-set to the desired water temperature. The
thermal actuator holds the water temperature at the valve to the
exact degree.
When the water temperature falls the valve opens and the flow of
warm water increases. When the water temperature rises, the
valve closes and shuts-off when the pre-set water temperature is
reached (except for a leakage rate).
With manual pre-setting the valve can only be set for optimal
operation under „full load“. The automatic regulation process
allows a permanent regulation and by that an optimal supply of
all pipelines under most economical energy use.
As part of Honeywell´s "Kombi“ family of valves, additional
functions can also be fitted and used after the valve has been
installed. The functions are carried out by installing adapters into
the cartridge spindle:
• The thermal actuator (preferably 50 - 60 °C [122 - 140 °F])
can be installed at any time without interrupting the supply of
warm water. The actuator is simply screwed into the spindle
and allows permanent hydronic balancing based on the
water temperature in the circulation pipe.
• The draining adapter is fitted to drain a pipe or riser and can
be removed when the draining process is finished. It can be
used with any Alwa-Kombi-4 potable water balancing valve
and also with any Honeywell Kombi-3-plus heating/cooling
balancing valve.
• The current temperature in the circulation line can be read on
the thermometer at any time. The thermometer can be used
for variants both with and without a temperature-controlled
actuator.
• The sampling valve is used in conjunction with the drain
adapter and is used to determine chemical and microbiological parameters.
Thermal disinfection at temperatures over 70 °C (158 °F)
Supported by Alwa-Kombi-4 with fitted thermal actuator
50 - 60 °C (122 - 140 °F)
Starting from the leakage rate the valve opens at a water temperature of 63 °C (145 °F) and the flow rate increases.
When the water reaches a temperature of 72 °C (162 °F) the flow
of the water is throttled to a flow rate below the leakage rate. This
has the advantage that the hydronic balance is retained and the
hot water is repily distributed in all risers and pipelines.
When the thermal disinfection process is finished and the water
temperature drops again, Alwa-Kombi-4 returns to the standard
control position..
Desinfection
range
72°C
(162°F)
Flow rate
Control
range
63°C (145°F)
Water temperature
Fig.1 Relation of flow rate and water temperature
Note: The thermal disinfection id only supported by the thermal
actuator 50 - 60 °C (122 - 140 °F), OS-No. VA2400A002.
The thermal actuator has to be set to 55 °C (131 °F) =
pre-setting 1.5.
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EN0H-1805GE23 R0307 • Subject to change
Dimensions
Hose connection G3/4"
Thernal actuator
Draining adapter
Tamper-proof cap
H1 (open)
2 space required for installation of accessories
H
Fig.2 Alwa-Kombi-4 with internal threads Fig.3 Alwa-Kombi-4 with external threads
Note: Draining adapter and thermal actuator available, see accessories.
V1810 Alwa-Kombi-4
Table 1. Alwa-Kombi-4
Version DN D1 kvs (cv)-
value
Alwa-Kombi-4 with
internal threads (Fig. 2)
15 Rp 1/2" 2.7 - 65 - - 85 135 27
20 Rp 3/4" 6.4 - 75 - - 100 150 32
25 Rp 1" 6.8 - 90 - - 100 150 41
32 Rp 1 1/4" 16.0 - 110 - - 137 210 50
40 Rp 1 1/2" 16.0 - 120 - - 137 210 55
Alwa-Kombi-4 with
external threads (Fig. 3)
15 G 3/4" A 2.7 15/18 65 81 105 85 135 30
20 G 1" A 6.4 22 75 91 125 100 150 37
25 G 1 1/4" A 6.8 28 90 108 148 100 150 47
32 G 1 1/2" A 16.0 35 110 128 178 137 210 52
40 G 1 3/4" A 16.0 42 120 140 198 137 210 60
Note: All dimensions in mm unless stated otherwise.
D2 L L1 L2 H1 H2 SW
EN0H-1805GE23 R0307 • Subject to change
Fig.4 Thermal actuator for Alwa-Kombi-4
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V1810 Alwa-Kombi-4
Order information
Table 2. Ordering text and OS-Nos. (OS = Ordering System).
Version OS.-No. DN 15 15 20 25 32 40
mm 15 18 22 28 35 42
R 1/2" 1/2" 3/4" 1" 1 1/4" 1 1/2"
Alwa-Kombi-4 throttle valve with internal threads V1810Y0 015 - 020 025 032 040
Alwa-Kombi-4 throttle valve with internal threads
and fitted ‘Mapress‘ press-fittings
Alwa-Kombi-4 throttle valve with internal threads
and fitted ‘Sanpress‘ press-fittings
Alwa-Kombi-4 throttle valve with external threads V1810X0 015 - 020 025 032 040
Note: Add desired size to OS-No.: V1810X0 in DN15 = V1810X0015
Accessories
Connections for external threads
Union nut, sealing and red bronze soldering tailpiece for
external threads
DN 15, for 15 mm pipe-∅˜ VA7400A015
DN 15, for 16 mm pipe-∅ VA7400A016
DN 20, for 18 mm pipe-∅˜ VA7400A018
DN 20, for 22 mm pipe-∅ VA7400A020
DN 25, for 28 mm pipe-∅ VA7400A025
DN 32, for 35 mm pipe-∅ VA7400A032
DN 40, for 42 mm pipe-∅˜ VA7400A040
Union nut, sealing and externally threaded red bronze tailpiece for external threads
DN 15 VA7401A015
DN 20 VA7401A020
DN 25 VA7401A025
DN 32 VA7401A032
DN 40 VA7401A040
Union nut with MAPRESS-fitting for external threads
DN 15, für 15 mm Rohr-∅ VA7403A015
DN 15, für 18 mm Rohr-∅ VA7403A018
DN 20, für 22 mm Rohr-∅ VA7403A020
DN 25, für 28 mm Rohr-∅ VA7403A025
DN 32, für 35 mm Rohr-∅ VA7403A032
DN 40, für 42 mm Rohr-∅ VA7403A040
Draining adapter
for all types and sizes VA3400A001
V1816Y0 015 018 020 025 032 040
V1817Y0 015 018 020 025 032 040
Sanpress/Profipress System connection set (red bronze)
DN 15, for 15 mm pipe-∅ VA7404A015
DN 15, for 18 mm pipe-∅ VA7404A018
DN 20, for 22 mm pipe-∅ VA7404A020
DN 25, for 28 mm pipe-∅ VA7404A025
DN 32, for 35 mm pipe-∅ VA7404A032
DN 40, for 42 mm pipe-∅ VA7404A040
Union nut, sealing and internally threades red bronze teilpiece for external threads
DN 15 VA7405A015
DN 20 VA7405A020
DN 25 VA7405A055
DN 32 VA7405A032
DN 40 VA7405A040
Thermal actuator
for all sizes, temperature
VA2400A002
setting range 50 - 60°C
(122-140°F)
for all sizes, temperature
VA2400B002
setting range 40 - 65°C
(104-149°F)
Note: Thermal disinfection is supported by thermal actuator
50 - 60°C (OS-No. VA2400A001) with pre-setting
between 1.5 and 2.0.
Thermometer
for all sizes 0 - 120 °C TH07K
60
80
40
100
120
20
0
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Sampling valve
for all sizes
only in conjunction with drain
adapter VA3400A001
VA3400C001
EN0H-1805GE23 R0307 • Subject to change
Installation Example
V1810 Alwa-Kombi-4
Warm water pipe
Circulation system
EN0H-1805GE23 R0307 • Subject to change
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