Vexve X Series Owner's manual

Vexve X™shut-o and balancing valves,
steel and stainless steel
installation, operation, adjustment and
maintenance manual

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Contents
1. General 4
2. Valve identification 5
3. Reception of consignments and storage 6
4. Installing the valve 7
4.1 Making a press fit connection 8
4.2 Installation on the end of the pipe 11
4.3 Commissioning and pressure testing 12
4.4 Determining the pre-set value for the balancing valve 12
4.5 Setting the pre-set values 13
4.6 Measuring the valve’s flow rate 13
5. Maintenance 14
5.1 Replacing the O-ring in the valves of X series 15
6. Appendices 16
6.1 Structure of balancing valves < DN 50 16
6.2 Structure of ball valves < DN 50 17
6.3 Pressure loss diagrams for balancing valves 18

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Note:
Read these instructions carefully and comply with them when installing, using and main-
taining the valve.
These are general instructions, and they do not cover every possible usage condition. The manufacturer
can provide further guidance on installing, using and maintaining the valve if required. If you are not sure
whether the valve is suitable for the intended application, contact the manufacturer.
Vexve Oy reserves the right to change these instructions without notifying the customer.
Vexve Oy shall not be liable for loss or damage incurred due to the incorrect transportation, handling,
installation, use or maintenance of the product.
Vexve Oy shall not be liable for loss or damage due to the presence of objects, particles or impurities that
should not be in the system.
Warranty
See Vexve Oy's General Conditions of Sale for more information about the warranty.
The warranty covers manufacturing and material defects. The warranty does not cover damage incurred
due to the incorrect installation, use, maintenance or storage of the product. Failure to follow these
instructions may void the warranty. Defective products covered by the warranty should be returned to the
manufacturer for investigation. Vexve Oy may grant a refund only when the product has been found to be
defective.
The warranty conditions are set out in Vexve Oy's General Conditions of Sale, which are available from
the manufacturer.
Warnings and symbols
Failure to observe the warnings and symbols may lead to severe personal injury or product damage.
The people using the products must be familiar with the warnings and instructions.
To guarantee flawless, stable operation, the product must be transported, stored and installed correctly
and commissioned carefully.
The following symbols are used in these instructions to draw the reader's attention to actions that are es-
sential in order to guarantee safety and the correct use of the product.
Meaning of the NOTE symbol:
The NOTE symbol is used alongside actions that are essential in terms of the correct use of
the product. Failure to observe this symbol may have damaging consequences.
Meaning of the WARNING symbol:
The WARNING symbol is used alongside actions that must be performed correctly in order to
avoid severe personal injury or product damage.

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-30
2
1
0
0 30 60 90 120 150 ºC
PN 16
1. General
The shut-o and balancing valves belonging
to the Vexve X series have integrated press fit
connections. They are designed to provide the
optimal shut-o and balancing functionality
for heating and cooling networks in buildings.
Steel valves are suitable to use with EN 10305
thin-walled steel pipes. Stainless steel valves are
suitable to use with EN 10312 thin-walled stain-
less steel pipes.
The steel valve (turquoise) is designed for clean
media, such as oxygen-free water or water–gly-
col mixtures.
The stainless steel valve (grey) is designed for
clean media. Vexve's stainless steel balanc-
ing valves are also suitable for many industrial
systems with media such as process waters,
ethanol, methanol, water–glycol mixtures or
freezium.
The valves in the X series can be used within the
limits shown by the pressure-temperature graph
below.
Graph 1. Pressure-temperature graph.
Note:
If you intend to use the valve with other media or in other applications, contact Vexve to
verify that the value is compatible with the planned use.
The structure of the valves in the X series is shown in Appendices 6.1 and 6.2.
For more detailed technical information relating to the dimensions, weights, torques, Kv values and other
characteristics, see Vexve's product list and data sheets (www.vexve.com). Valve product information can
also be found in MagiCAD database.
Suitability of press fit connection’s O-ring
(CIIR/EPDM):
· heating water
· cooling water without antifreeze
· cooling water with antifreeze
· district heating water ≤ 120 ˚C
· extinguishing water (wet)
· sprinkler (wet)
· compressed air (oil cleanliness class 0–3)

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2. Valve identification
Figure 1. Identification plate
The identification plate is on the body of the valve. It contains the following information:
1. DN size (nominal size) of the valve
2. Pressure class
3. Material of the valve's body
4. Operating temperature range
5. Product number
6. LVI number (only in Finland)
7. CE marking
8. Flow direction (balancing valves)
9. Product brand
10. Date of manufacture
11. Manufacturer's website address
0219
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3
4
6
7
9
11
2
5
10
8
DN 32 PN 16(35 mm)
Material:
Tmin…Tmax:
Product no:
LVI-no:
1.0345
-30…120 ºC
142032X
4011627
Direction of ow

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3. Reception of consignments and storage
Check that the content of the delivery corre-
sponds to the order. Also check that the valve
and related accessories were not damaged in
transit.
Store the valve carefully until it is installed. It is
recommended to store the valve in a dry, well-
ventilated place, such as a shelf or on a wooden
pallet, where it is protected from rising damp.
The valve must be transported to the installa-
tion location in a robust package. The protective
covers for the flow openings must be removed
immediately before installation. The valve should
be protected from sand, dust and other impuri-
ties.
The valve is delivered from the factory in the
open position. The valve must remain in the
open position during storage.
The maximum storage period is two years.
Package
Vexve's products come in packages designed
for transportation. The packages are made from
environmentally friendly material that is easy to
sort and recycle.
We recommend recycling the packaging mate-
rial.
The packaging material is wood, cardboard,
paper and polyethylene plastic.
Recycling and disposal
Almost all of the components of the valve are
manufactured from recyclable material. The
material is marked on the majority of the com-
ponents. Separate instructions on recycling and
disposal are available from the manufacturer.
For a fee, the valve can also be delivered to the
manufacturer, who will recycle and dispose of
the valve appropriately.

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WARNING:
Incorrect installation may lead to severe personal injury and may damage the product
or cause it to malfunction. For this reason, these instructions must be followed carefully
when the valve is installed.
These instructions are general instructions, and they do not cover every possible usage
condition. If you require further guidance related to using the valve or additional informa-
tion on its suitability for the intended application, contact the manufacturer.
· M- and V-profile press jaws are suitable for pressing.
· The compressive force of the press tool for pressing the 18–35 mm size valves must be at least 19kN.
· Loop-type press jaws are recommend for pressing the 42mm and 54mm sizes, and the compressive
force of the press tool must be at least 32kN.
· The protective covers for the flow openings must only be removed immediately before installation. The
valve should be protected from sand, dust and other impurities.
· Take great care when you test the valve before fitting it to the pipe network.
· The valve must not be lifted by the handle or precision control knop. Dropping the valve or lifting it
incorrectly may lead to severe personal injury or product damage.
Note:
The valve should only be used in the applications for which it is intended.
Immediately before installation:
· Remove the protective covers for the flow openings (shut-o valve) and check that the internal surfaces
of the valve are clean and the leak before press (LBP) O-rings at the ends of the press connection are
in place and undamaged.
WARNING:
The end of the pipe to be connected must be cut straight and all sharp burrs must be
removed carefully from the external and internal surfaces. Any impurities in the valve or
pipe could damage the valve or its coupling heads.
4. Installing the valve

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1. Cutting the pipe
Cut the pipe using a tool intended for cutting
thin-walled pipes.
2. Removing burrs
Remove all burrs from the cut pipe using a tool
intended for the purpose.
3. Cleaning
Clean any loose debris from the coupling head
and check that there are no sharp burrs on it.
4. Check the coupling heads
Check the coupling head of the pipe: it must be
circular and undamaged.
5. Marking the installation depth
Mark the correct installation depth on the pipe
using the Vexve installation depth gauge.
6. Checking the coupling heads of the valve
Visually inspect the valve's coupling head for any
damage and ensure that the O-ring is in place in
its groove.
4.1 Making a pressed connection

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7. Fitting the pipe into the valve
Fit the coupling head of the pipe into the valve to
the fullest extent and ensure that the installation
depth marking matches up.
9. Pressing the connection
Press the connection using a standard-compli-
ant M or V profile press tool intended for press-
ing thin-walled steel pipes.
8. Check before pressing
Before pressing, check that the O-ring groove
on the valve meets the groove on the tool.
10. Removing the collar
Remove the cracked collar by hand if it does not
detach of its own accord.

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Minimum installation distances:
In the Figure 2, D = the diameter of the pipeline
5 D 2 D
Flow direction >>>
Flow direction >>>
Figure 2. Minimum installation distances
10 D
Note:
The recommended installation position for the valve is with the shaft in the vertical or
horizontal position.

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Note:
The valve must not be used as a terminal for the pipe – a cap plug must always be fitted
to the other side of the valve (see Figures 3 and 4).
If the valve is installed onto the end of a pipeline, there is a danger of corrosive, acidic water or air col-
lecting in the empty end of the valve. To prevent corrosion, there must be oxygen-free water in the section
beyond the valve.
Figure 4. Cap plug. There must be at least
200mm of pipe between the valve and the cap
plug.
Figure 3. The valve must not be used as a termi-
nal for the pipeline
4.2 Installation on the end of the pipe
Note:
If the valve and the cap plug are installed as the terminal for a pipeline, the valve must
be completely in the open position. A closed area must not be allowed to arise between
the valve and the cap plug because the valve may be damaged if the water expands in a
closed area (for example, due to a change in temperature).

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Exceeding the permitted values shown on the valve may damage the valve and, in the worst case, lead to
an uncontrolled pressure discharge. This can damage the product and could also cause personal injury
and property damage. When the valve is closed, the maximum permitted testing pressure is 1.1xPN.
While the pipeline is being pressure-tested, (1.5xPN) the valve must be opened.
The desired Kv value can be pre-set for the valve:
· If the desired Kv value is known, the suitable valve size and pre-set value can be verified using Table 1.
· If the desired Kv value is not known, the suitable valve size and pre-set value can be determined using
pressure loss diagrams (pages 18–20) if the valve's flow rate and pressure loss are known.
4.3 Commissioning and pressure testing
4.4 Determining the pre-set value for the balancing valve
Table 1. Kv values for Vexve X balancing valves
Pre-set value DN 15 DN 20 DN 25 DN 32 DN 40 DN 50
1,0 - 0,04 0,19 0,22 0,48 0,71
1,5 0,04 0,07 0,35 0,41 0,6 1,29
2,0 0,06 0,12 0,56 0,61 0,82 2,09
2,5 0,11 0,20 0,77 0,85 1,29 3,10
3,0 0,18 0,30 1,10 1,21 1,84 4,02
3,5 0,25 0,45 1,41 1,67 2,47 5,11
4,0 0,33 0,63 1,80 2,17 3,29 6,48
4,5 0,45 0,83 2,29 2,68 4,19 8,20
5,0 0,59 1,02 2,86 3,46 5,44 10,43
5,5 0,72 1,51 3,60 4,50 7,05 13,01
6,0 0,90 2,10 4,63 5,89 9,09 16,25
6,5 1,13 2,72 5,62 7,35 11,45 20,39
7,0 1,42 3,52 6,77 9,14 13,99 24,53
7,5 1,70 4,39 8,35 11,01 17,09 29,30
8,0 2,04 5,40 9,96 12,85 20,24 34,13
8,5 2,32 6,66 11,76 15 22,78 37,10
9,0 2,61 8,18 13,75 17,29 25,14 39,73

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2
3
4.5 Setting the pre-set values
See Figure 5
Balancing valves
1. Set the limiter (2) to the specified pre-set
value (1)
2. Adjust the hand (3) so it rests on the edge
of the limiter (2)
Note! If the pre-set value is C, the valve
functions as a shut-o valve.
4.6 Measuring the valve's flow
rate
The valve's flow rate can be measured using
a separate flowmeter. These devices measure
the pressure on both sides of the valve and
calculate the pressure loss caused by the valve
on the basis of the measurements. The measur-
ing device determines the flow rate based on the
pressure loss and the Kv value corresponding to
the valve's pre-set value. Contact Vexve Oy for
additional information on suitable flowmeters.
Figure 5.
Setting the pre-set value.

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Valves of Vexve X series are practically maintenance-free.
The need for maintenance is significantly reduced by selecting the correct valve for the application and
ensuring error-free installation, commissioning and use.
Warning:
When the valve is connected to the pipeline, the temperature of the external surface may
be dangerously high. Protect yourself from burns.
We recommend regularly checking the following:
• Check that the valve's surface is not damaged and that there are no discernible leaks from the shaft
structure.
• Repair any damage carefully.
In the event that the valve is used rarely (ten times per year or fewer), we recommend checking the follow-
ing to ensure the long-term reliability of the valve:
• Check that there are no discernible leaks from the stem structure, check the condition of the handle
or control knop, and check that the measuring blocks are sealed.
5. Maintenance

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3
2
5
4
· Remove the handle or control knop by pulling
hard on it directly upwards
· Remove the retaining ring
· Remove the stem sealing bush
· Remove the damaged O-ring
· Put the new O-ring in place by pressing the
upper surface evenly downwards
· Put the new stem sealing bush in place by
pressing the upper surface evenly downwards
· Put the new retaining ring in place
· Put the removed handle or control knop back
in place
Component Steel Stainless steel
1Retaining ring 299415 289115
2Stem sealing bush 901088 901088
3O-ring 901105 901101
4Handle 901115 901115
5Precision control knop 901130T 901130H
5.1 Replacing the O-ring in the valves of X series

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6.1 Structure of balancing valves < DN 50
6. Appendices
9
11
7
14
8
10
3
12
13
15 1 3 4 5
16
17
22
6
Compo-
nent
number
Name Units
1 Body 1
2 Extension pipe, pressed 2
3 Ball seal 2
4 Support plate 2
5 Spring plate 2
6 Stem bush 1
7Stem 1
8 Sealing cu 1
9 Retaining ring 1
10 Sliding plate 1
11 O-ring 2
12 Ball 1
13 Flow pipe 1
14 Precision control knop 1
15 LBP O-ring 2
16 Measuring block, blue 1
17 Measuring block, red 1

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6.2 Structure of ball valves < DN 50
Compo-
nent
number
Name Units
1 Body 1
2 Extension pipe, pressed 2
3 Ball 1
4 Ball seal 2
5 Support plate 2
6 Spring plate 2
7 Stem bush 1
8Stem 1
9 Stem sealing bush 1
10 Retaining ring 1
11 Sliding plate 1
12 O-ring 2
13 O-ring 1
14 Handle 1
15 Handle cover 1
16 LBP O-ring 2
15
14
13
9
12
16 1 4 5 6
10
11
8
3
22
7

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6.3 Pressure loss diagrams for balancing valves
0,1
1
10
100
0,01 0,1 1
Δp(kPa)
Q(m³/h)
Set value 9
Set value 8 Set value 7
Set value 6 Set value 5 Set value 4 Set value 3 Set value 2
0,1
1
10
100
0,01 0,1 1 10
Δp(kPa)
Q(m³/h)
Set value 9 Set value 8 Set value 7 Set value 6 Set value 5 Set value 4 Set value 3 Set value 1 Set value 2
DN 15
DN 20

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0,1
1
10
100
0,1 1 10
Δp(kPa)
Q(m³/h)
Set value 9 Set value 8
Set value 7
Set value 6 Set value 5 Set value 4 Set value 3 Set value 2
Set value 1
0,1
1
10
100
0,1 1 10
Δp(kPa)
Q(m³/h)
Set value 9 Set value 8 Set value 7 Set value 6 Set value 5
Set value 4
Set value 3 Set value 2 Set value 1
DN 25
DN 32

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0,1
1
10
100
0,1 1 10
Δp(kPa)
Q(m³/h)
Set value 9 Set value 8 Set value 7 Set value 6 Set value 5 Set value 4 Set value 3 Set value 2 Set value 1
DN 40
0,1
1
10
100
0,1 1 10
Δp(kPa)
Q(m³/h)
Set value 9 Set value 8 Set value 7 Set value 6 Set value 5 Set value 4 Set value 3 Set value 2 Set value 1
DN 50