Albion ART24 Instruction manual

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 1
ART24 Differential Pressure
Control Valve (DPCV)
Technical Data and
Installation Instructions

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 2
Main features:
ART24 is used for balancing the flow in cooling, heating and domestic water systems.
ART24 is a differential pressure control valve that maintains constant differential pressure
regardless of flow rate with the following features:
• Selection of the required differential pressure with an Allen key on the handle;
• Supplied with 2 pcs. of measuring nipples for needles;
• Simple removal of the internal cartridge for the flushing stage;
• No need of inlet and outlet straight pipelines to stabilize the flow.
It is supplied with internal thread.
It is made of “CR” brass (“CR” - Corrosion Resistant).
This article is made in compliance with the quality management requirements of ISO
9001:2008 standard.
All articles are tested according to the EN 12266-1:2003 standard.
It can be used in a wide variety of sectors: heating, air conditioning, water, sanitary systems
and generally with any non corrosive liquid.
PN 16
Approved by*:
Technical data:
Max. static working pressure 16 bar
Max. differential pressure 400 kPa
Differential pressure range 5-30 kPa -Low Pressure (24LP)
20-60/80 kPa -High Pressure (24HP)
Flow rate range 50-2500 l/h - Low Pressure (24LP)
100-15000 l/h - High Pressure (24HP)
Max. flow temperature 120°C
Min. temperature -10°C
Fluids: Water and Glycol
Material of parts in contact with water:
Valve body;
Cartridge, etc.
Materials: “CR”Brass (EN 12165-CW602N-M)
O-rings: EPDM Perox
Threads: ISO 228

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 3
Models:
ART24 LP - Differential pressure control valve - PN 16 - “CR” Brass - Low Pressure
Differential pressure control valve
Partner valve
DN Material Thread Δp range Flow rate Part Code
15
CR Brass
EN 12165-CW602N-M
G. 1/2” 5 ÷ 30 kPa 50 ÷ 600 l/h ADPC24L050
20 G. 3/4” 5 ÷ 30 kPa 100 ÷ 1000 l/h ADPC24L075
25 G. 1” 5 ÷ 30 kPa 600 ÷ 2500 l/h ADPC24L100
32 - - - -
40 - - - -
50 - - - -
ART24 HP - Differential pressure control valve - PN 16 - “CR” Brass - High Pressure
DN Material Thread Δp range Flow rate Part Code
15
CR Brass
EN 12165-CW602N-M
G. 1/2” 20 ÷ 60 kPa 100 ÷ 1200 l/h ADPC24H050
20 G. 3/4” 20 ÷ 60 kPa 150 ÷ 2000 l/h ADPC24H075
25 G. 1” 20 ÷ 60 kPa 700 ÷ 4200 l/h ADPC24H100
32 G. 1”1/4 20 ÷ 80 kPa 1000 ÷ 5000 l/h ADPC24H125
40 G. 1”1/2 20 ÷ 80 kPa 3000 ÷ 8000 l/h ADPC24H150
50 G. 2” 20 ÷ 80 kPa 5000÷ 15000 l/h ADPC24H200
ART28DP - Balancing valve - Variable orifice - PN 25 - Capillary fitting
DN Material Thread Kv - Kvs Part Code
15
CR Brass
EN 12165-CW602N-M
1/2” Rp 0.42 ÷ 1.75 ADPC28DP050
20 3/4” Rp 0.44 ÷ 2.87 ADPC28DP075
25 1” Rp 0.52 ÷ 4.08 ADPC28DP100
32 1”1/4 Rp 0.7 ÷ 6.71 ADPC28DP125
40 1”1/2 Rp 0.82 ÷ 10.40 ADPC28DP150
50 2” Rp 1.14 ÷ 15.06 ADPC28DP200

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 4
Accessories:
ART24 IT 1M - Impulse tube
DN Material Thread Length Part Code
4 Copper G. 1/8” 1 m ADPC24IT1M
ART24 IT 2M - Impulse tube
DN Material Thread Length Part Code
4 Copper G. 1/8” 2 m ADCP24IT2M
ART24 VF - Fitting for impulse tube
DN Material Thread Part Code
4Standard Brass
EN 12165-CW617N-M G. 1/8” RC09120000
ART24 VG - Reducer
DN Material Thread Part Code
1/4”x1/8” Standard Brass
EN 12165-CW617N-M G. 1/4”x1/8” RC09130000

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 5
Cross section:
9
1
6
4
11
5
8
10
3
2
7
1. Valve body
2. Bonnet
3. Stem
4. Screwed end
5. Differential pressure
Cartridge
6. O-ring
7. O-ring
8. Red binder point
9. Blue binder point
10. Cap
Installation procedure:
Before installation of ART24, check that inside the valve and the pipes there are no foreign
matters which might damage the tightness of the valve.
Burr pipe connections after having threaded them and distribute the sealing material on
pipe threads only and not on valve threads.
Make sure that required flow rate is within operating range of the valve. ART24 shall be
installed on the return line either on horizontal or vertical position, but following the arrow
direction casted on valve body, which shall be the same as the flow one.
ART24 is coupled with partner valve ART28DP, installed on the flow pipeline by a copper
capillary pipe (Implulse tube).
For assembly purpose, use a spanner, not a pipe wrench, by applying necessary working
torque only on the valve end nearest to the pipe. This helps get a firmer grip and avoids
potential damages to valve body. Make sure that pipe threading length is not longer than
valve threads.
After DPC cartridge removal, it is possible to flush the system branch where the valve is
installed; when flushing process is over, place the DP control cartridge again.

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 6
Typical installations:
ART24 DPCV should be used in radiator heating systems to control the pressure fluctuations
and limit the extra-flow rates in the radiators.
Generally in these systems, thermostatic valves are installed in order to give the possibility
to regulate the temperatures in the heated rooms. The flow rates in each emitter will be
constantly modulated as the thermal load changes. As a result the system pressure will
fluctuate significantly and the DPCV will absorb the extra-pressures.
Controlling differential pressure over the riser means also that the thermostatic valve
authority is high, allowing an efficient and stable temperature control and consequently
an energy saving. They are often used to prevent noise problems within pipework and TRV.
ART24 valves are used in floor heating systems in order to limit the flow rates of each
loop, their installation in the pipeline that supplies the manifold, enables an easier flow rate
regulation.

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 7
ART24 installation is advisable on fan-coil units with 2 port control valves already existing.
It is possible to install a DPCV to control the flow rate of a generic load by changing the
layout of installation as it is shown in the scheme below. This configuration is the basis of
the Pressure Independent Control Valves (PICV ART20C, ART20 & ART200) where the three
valves are integrated in one single body.
LOAD:
Power (kW)
Differential
temperature (°C)
Controller

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 8
Δ
pb
Pressure drop across Cim 787DP
Δ
pv Pressure drop across Cim 767LP
Δ
pc
Necessary pressure for the circuit
Δ
pa
Available pressure for the riser
Δ
pa
=
Δp
b
+ Δp
c
+ Δp
v
Δ
pv
Δ
pb
Δ
pc
Q
Δ
pa
Δ
p
b
Pressure drop across ART28DP
Δ
p
v
Pressure drop across ART24
Δ
p
c
Necessary pressure for the circuit
Δ
p
a
Available pressure for the riser
Δ
p
a
=
Δp
b
+ Δp c + Δp v
Δ
p
a
Δ
p
b
Δ
p
v
Δ
p
c
Q
Δ
p
r
Δ
p
r
Set pressure
r
=
Δp
b
+ Δp c
Δ
p
ART24 DPCV can be installed in two configurations:
• Partner valve inside the control loop;
• Partner valve outside the control loop.
The first configuration is suitable for the plants where there are balancing valves for the
regulations of the maximun flow rates or thermostatic valves with pre-setting.
In this way, the ART28DP, or a generic regulating valve, is used to regulate the pressure
drop across the DPCV.
By closing the partner valve the pressure across the DPCV decreases and the shutter opens,
in the other way, by opening the partner valve the pressure across the DPCV increases and
the shutter closes.
This configuration does not permit to regulate the total flow rate in the branch.
This installation has the best performance in terms of control of the pressure and energy
saving. If a ART28DP is used, it is possible to measure the flow rate using a differential
pressure instrument (for quick reference use the ART28 data sheet).
The other configuration is suitable for plants where there are not devices for the limitation
and regulation of the flow rates in each emitters. The partner valve is used to set the total
flow rate in the branch. If an ART28DP is used, it is possible to measure the flow rate using
a differential pressure instrument (for quick reference use the ART28 data sheet).
Configurations:

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 9
Regulating:
ΔP regulation of ART24 valve (see picture) is carried out by a 4mm Allen key.
The relation between flow rate, ΔP of flow and return pipework and screwing turns of regu-
lating Allen screw are given by the tables stated in the following pages.
ΔP increase and decrease is reached by turning clockwise or anticlockwise Allen screw
respectively (see picture).
During regulation of differential pressure, the valve shall be set to minimum value to pro-
ceed with turns numbering; after that, the valve shall be regulated according to tables.
ΔP of the system is measured through a differential pressure manometer with two
sensors, red and blue, which are inserted in binder points PF- and P+respectively (see pic-
ture below).
Flow rate of the system is measured through a partner balancing valve ART28DP, by measuring
the difference in pressure between points P
F+
and P
F-
and referring to the graphs
in the ART28 Data sheet.
Pressure drop of ART24 valve under service is shown when the two sensors of measuring
device are inserted in the binder points of the said valve.
Sizing:
K =
VKVS orifice
Kvs orifice - Kv across orifices
Kv - Kv across valve
FLOW COEFFICIENT
Kv, in international system represents the flow in m3/h of water at the temperature of 15
°C (density =998 kg/m3) which causes a pressure drop of 1 bar. In USA flow coefficient is
called Cv (Kv = 0.865 Cv).
It is possible calculate the pressure drop across a valve with a generic flow rate and fluid:
where:
r is the relative density, Q is the flow rate in m3/h.
Relative density
Fluid r
Water 1.000
Water and glycol 10% 1.012
Water and glycol 20% 1.028
Water and glycol 30% 1.040
Water and glycol 40% 1.054
Water and glycol 50% 1.067
PF-
PF+ P+
P-
P+
P-
PF-
PF+
Partner valve outside the control loop. Partner valve inside the control loop.

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 10
EXAMPLE - Partner valve outside the control loop
It is required to keep constant the supplying pressure of a group of emitters that has the
following charateristics at the design conditions:
• Necessary pressure for the circuit: Δpc=13 kPa;
• Available pressure for the riser: Δpa=35 kPa;
• Flow rate: Q= 1.5 m3/h=0.417 l/s;
• Pipeline size: DN 25.
The required differential pressure is quite low, it is possible to use the ART24 version
(5-30 kPa) and set it to get the required pressure drop across the circuit (13 KPa). In order
to simplify the installation, it is possible to select the same diameter of the pipeline (DN 25).
Using the attached tables, it is possible to calculate the pressure drop across the DPCV
when it is fully open:
The pressure drop across the partner valve should be:
In order to get the value found above, the partner valve should be set with the following
value of Kv:
The correct valve should be a ART28DP DN25 with the set 3.2.
By closing the partner valve it is possible to change the pressure drop across the DPCV,
when the Cim 787DP is fully open (Set 4.0 - Kv = 4.08), the pressures will be:
Δ
pb
Pressure drop across ART28DP
Δ
pv
Pressure drop across ART24
Δ
pc
Necessary pressure for the circuit
Δ
pa
Available pressure for the riser
Δ
pa
=
Δp
b
+ Δp
c
+ Δp
v
Δ
pv
Δ
pb
Δ
pc
Q
Δ
pa
In this situation the shutter of the DPCV is not fully open as before.
The user can select the balancing valve using positions of the handle that are between the
values written over. This setting affects only the position of the DPCV shutter at the design
conditions.
Using the regulation charts it is possible to get the setting of the DPCV: 13.5 turns.
SUGGESTED VALUES AND TIPS:
• Velocities in the pipeline:
Max = 1.15 m/s
Min = 0.75 m/s

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 11
SUGGESTED VALUES AND TIPS:
• Velocities in the pipeline:
Max = 1.15 m/s
Min = 0.75 m/s
Δ
p
b
Pressure drop across ART28DP
Δ
p
v
Pressure drop across ART24
Δ
p
c
Necessary pressure for the circuit
Δ
p
a
Available pressure for the riser
Δ
p
a
= Δp
b
+ Δp c + Δp v
Δ
p
a
Δ
p
b
Δ
p
v
Δ
p
c
Q
Δ
p
r
Δ
p
r
Set pressure
r
=
Δp
b
+ Δp c
Δ
p
EXAMPLE - Partner valve inside the control loop
It is required to keep constanst the supplying pressure of a group of emitters that has the
following charateristics at the design conditions:
• Necessary pressure for the circuit: Δpc=13 kPa;
• Available pressure for the riser: Δpa=35 kPa;
• Flow rate: Q= 1.5 m3/h=0.417 l/s;
• Pipeline size: DN 25.
The DPCV with the partner valve have to create a total pressure drop that is:
According to technical good practice rule, the advisable pressure across a DPCV should be
less then or equal to 10 kPa, it is possible to size the manual balancing valve in order to get
this limit value. Supposing a pressure drop on the manual balancing valve of 15 kPa, it is
possible to select the size of this valve:
It is possible to select a DPCV Low Pressure (5-30 kPa). Supposing the same diameter of
the partner valve and pipiline (DN 25) and seeing the regulation charts it is possible to get
the setting of the DPCV: 32.5 turns.
By closing the partner valve it is possible to reduce the flow rate in the whole circuit, other-
wise by opening the partner valve it is possible to increase the total flow rate.
The correct valve should be a ART28DP DN25 with the pre-set 3.7.
The remaining part of extra-pressure has to be absorbed by the DPCV.
In order to get the required flow rate, the DPCV has to be set with a design differential pres-
sure that can be calculated as below:

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 12
EXAMPLE - Needed pressure for the circuit
The circuit pressure has to be selected in order to give authority to the control valves that
are installed for each emitters, in this way the control will be stable with the maximun en-
ergy saving. A good sizing avoids also noises problems.
A good reference for the sizing of an hydraulic system in bulding service is the german
guide VDI 2073 that gives the indications in order to get it.
Taking into consideration a generic circuit as the below drawing, it is possible to calculate
the flow rates for each connection using the power of the emitters and the design spread.
Name Type Power Design
spread Qm Qm
W °C kg/s l/h
E1 Fancoill 1600 10 0.0382 137
E2 Fancoil 1500 10 0.0358 129
E3 Radiator 1250 15 0.0199 72
E4 Radiator 1300 15 0.0207 74
E5 Radiator 1450 15 0.0231 83
TOTAL 7100 12,31 0.1378 495
There is in the distribution circuits a pronunced grading of the differential pressures in cor-
rispondence of the emitters connections.
In the design conditions (case A), the pressure drop of each sections
i
from
1
to
k
is:
For each emitter, it is possible to calculate the required differential pressure that is used to
regulate the DPCV:
Where:
ΔpV,A is the pressure loss across a control valve;
ΔpLV,A is the pressure loss across a lockshield valve;
Δpcon,A is the pressure loss of a connection.
SUGGESTED VALUES AND TIPS:
• Authority:
Min = 0.3
Optimal = 0.5
• Velocities in the pipeline:
Max = 1.15 m/s
Min = 0.75 m/s
• Pressure drop across control valve:
Max = 10 kPa;
AUTHORITY
It is the ratio between the design pres-
sure drop (calculated at valve opened
as design) and the diffrential pressure at
closed valve.
E1 E2 E3 E4 E5
∆p
2,A
/2
∆p2,A/2
∆p
3,A
/2
∆p3,A/2
∆p
4,A
/2
∆p4,A/2
∆p
5,A
/2
∆p5,A/2
∆preg
∆p
con1
+ ∆p
V1,A
+∆p
LV1,A
∆pV1,A ∆pV2,A ∆pV3,A ∆pV4,A
∆pV5,A
∆p
1,A
/2
∆p1,A/2
∆pLV1,A ∆pLV2,A ∆pLV3,A ∆pLV4,A ∆pLV5,A
∆p
con2
+ ∆p
V2,A
+∆p
LV2,A
∆p
con3
+ ∆p
V3,A
+∆p
LV3,A
∆p
con4
+ ∆p
V4,A
+∆p
LV4,A
∆p
con5
+ ∆p
V5,A
+∆p
LV5,A

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 13
Section L Length Qm DN v RLRL*L ∑z Z RL*L+Z
m l/h mm m/s kPa/m kPa - kPa kPa
1 12 495 18x1 0.68 0.441 5.29 7.7 1.80 7.09
2 8 358 18x1 0.49 0.252 2.02 3.5 0.43 2.44
3 8 229 16x1 0.41 0.219 1.75 2 0.17 1.92
4 8 157 16x1 0.28 0.116 0.93 2 0.08 1.01
5 8 83 16x1 0.15 0.025 0.20 2 0.02 0.22
Con.1 3 137 14x1 0.34 0.189 0.57 9 0.51 1.08
Con.2 2 129 14x1 0.32 0.169 0.34 9 0.45 0.79
Con.3 5 72 14x1 0.18 0.039 0.20 6 0.09 0.29
Con.4 3 74 14x1 0.18 0.041 0.12 6 0.10 0.22
Con.5 2 83 14x1 0.20 0.080 0.16 6 0.12 0.28
Where:
Qm is the flow rate in each branch;
DN is the nominal diameter of the pipe (Copper EN 1057);
v is the velocity in the pipe;
RL are the distribuited pressure losses per meter;
∑z is the sum of the concentred pressure losses coefficents (bends, fittings,emitters etc.);
Z are concentred pressure losses.
Distribuited pressure losses per meter , kPa/m
1.000
100
200
300
400
500
600
700
800
900
0.1
0.080,060,050,040,030,020,01 10.80.70.60.50.40.30.2 5432
10.000
2.000
3.000
4.000
5.000
7.000
8.000
9.000
100.000
20.000
30.000
40.000
50.000
60.000
70.000
80.000
90.000
200.000
1.000
100
200
300
400
500
600
700
800
900
10.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
9.000
100.000
20.000
30.000
40.000
50.000
60.000
70.000
80.000
90.000
200.000
6.000
Flow rate, l/h
0.12 0.14
50
60
70
80
90
50
60
70
80
90
0,
4
m/s
0,8
m/s
1,
2
m/s
1,
4
m/s
1,
6
m/s
1,
8
m/s
2,0
m/s
2,5
m/s
3,0
m/s
3,
5
m/s
4,0
m/s
0,2
m/s
0,4
m/s
0,6
m/s
0,8
m/s
1,0 m/s
0,
6
m/s
1,0
m/s
10 - 8
12 - 10
14 - 12
16 - 14
18 - 16
28 - 25
35 - 32
42 - 39
54 - 51
76,1 - 72,1
18 - 16
28 - 25
35 - 32
42 - 39
54 - 51
76,1 - 72,1
88,9 - 84,9
108 - 103
22 - 19 22 - 19
22 - 20
22 - 20
COPPER PIPE EN 1057
15 - 13

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 14
Emitter E1 E2 E3 E4 E5 -
Section from 1 to 1 2 3 4 5 -
Connection pipe Con.1 Con.2 Con.3 Con.4 Con.5 -
∑Δpi,A 7.09 9.53 11.45 12.46 12.68 kPa
Δpcon,A 1.08 0.79 0.29 0.22 0.28 kPa
∑Δpi,A+ Δpcon,A 8.17 10.32 11.74 12.68 12.96 kPa
Kv Control valve 0.60 0.60 0.43* 0.43* 0.43* (m3/h)/bar0.5
ΔpV,A 5.24 4.60 2.77 2.99 3.72 kPa
Kv lockshield val-
ve**
2.7 2.7 2.7 2.7 2.7 (m3/h)/bar0.5
ΔpLV,A 0.26 0.23 0.07 0.08 0.09 kPa
Δpreg 13.66 15.15 14.58 15.75 16.78 kPa
Δpbal 3.12 1.63 2.20 1.03 0.00 KPa
* The Kv of the thermostatic valves is taken with a proportional band of 1K.
** The Kv is related to the lockshield valve when it is fully open.
Where:
ΔpV,A is the pressure loss across the control valve;
ΔpLV,A is the pressure loss across the lockshield valve;
Δpreg is the required differential pressure for the emitter;
Δpbal is the required pressure loss across the balancing valve or lockshield valve;
The DPCV will be set with the maximum differential pressure (Δpreg,DPCV)in order to supply
each emitters with the nominal flow. In this example we have 16.78 kPa, it is necessary to
instal balancing valves in order to avoid extraflows in the other branches where it would be
required a lower value of pressure. The pressures introduced with the manual balancing
valves can be calculated using the following relation:
While in the radiator it is possible to use the lockshield valves, in the fan coils it is possible
to install a balancing valve like the ART28:
Emitter E1 E2 E3 E4 E5 -
Δpbal 3.12 1.63 2.20 1.03 0.00 KPa
Balancing Kv 0.78 1.01 0.49 0.73 - (m3/h)/bar0.5
Cim 787 DN15 DN15 - - - -
Preset 0.6 0.9 - - - -
Lockshield valve
Kv ***
- - 0.48 0.71 - (m3/h)/bar0.5
* The Kv is calculated taking into consideration that the pressure across the fully open
lockshield valve was already used.

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 15
If in an operational case (case B) a generic control valve V closes the flow rate in an emitter
and the regulated pressure is maintained constant (for example with a DPCV), the flow in
all the sections from 1 to k decreases by qm,V,A and the pressure drop decreases to:
The pressure drop in a section
i
in the design case Δpi,A , can be expressed approximately
by an equivalent resistance Ri:
When the water flow changes, the equivalent resistance remains constant. If the flow is
reduced by qm,V,A , the variation of pressure in a generic sector is:
Section
Ri Δpi,B
kPa/(l/h)2E1 E2 E3 E4 E5
kPa kPa kPa kPa kPa
1 28.93*10-6 3.70 3.88 5.19 5.12 4.91
2 19.09*10-6 1.00 1.56 1.53 1.44
3 36.73*10-6 0.91 0.88 0.78
4 40.62*10-6 0.28 0.23
5 31.82*10-6 0.00
Con.1 57.21*10-6
Con.2 47.48*10-6
Con.3 56.43*10-6
Con.4 40.20*10-6
Con.5 41.39*10-6
∑Δpi,B 3.70 4.88 7.66 7.81 7.36
If the control valve V is designed with a pressure drop ΔpV,A, its authority is:
Using a minimum authority that is introduced for control engineering reason (i.e. av>0.3), it
is possible to check if the selected valves are suitable.
Emitter E1 E2 E3 E4 E5 -
Section from 1 to 1 2 3 4 5 -
Connection pipe Con.1 Con.2 Con.3 Con.4 Con.5 -
ΔpV,A 5.24 4.60 2.77 2.99 3.72 kPa
Δpreg 16.78 kPa
Δpbal 3.12 1.63 2.20 1.03 0.00 kPa
∑Δpi,B 3.70 4.88 7.66 7.81 7.36 kPa
av0.40 0.39 0.30 0.33 0.40 -

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 16
E1 E2 E3 E4 E5
5.24 kPa
7.09/2 kPa
4.60 kPa 2.77 kPa 2.99 kPa 3.72 kPa
16.78 k
Pa
0.26 kPa 0.23 kPa 2.27 kPa 1.11 kPa 0.09 kPa
3.12 kPa 1.63 kPa
9.70 kPa 7.25 kPa 5.33 kPa 4.32 kPa 4.09 kPa
7.09/2 kPa
2.44/2 kPa
2.44/2 kPa
1.92/2 kPa
1.92/2 kPa
1.01/2 kPa
1.01/2 kPa
0.22/2 kPa
0.22/2 kPa
137 l/h 129 l/h 72 l/h 74 l/h 83 l/h
495 l/h 358 l/h 229 l/h 157 l/h 83 l/h

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 17
Pressure-temperature
ratings:
2 22
FROM MULTIPLY BY
TO OBTAIN
inches 0,0254 m, metres
inches 2,54 cm, centimetres
feet 0,3048 m, metres
feet 30,48 cm, centimetres
yards 0,9144 m, metres
square inches 0,00064516 m2, metri quadrati
square feet 0,09290304 m2, square metres
square inches 6,4516 cm2, square centimetres
square feet 929,0304 cm 2, square centimetres
square yards 0,8361274 m2, square metres
l, litres 0,001 m3, cubic metres
gallons 0,003789412 m3, cubic metres
cubic yards 0,7645549 m3, cubic metres
cubic feet 0,02831685 m3, cubic metres
cubic inches 0,0000164 m3, cubic metres
cubic inches 16,38706 cm 3, cubic centimetres
cubic feet 28,31685 l, litres
gallons 3,875412 l, litres
TO OBTAIN DIVIDE BY FROM
Pressure
Length, Area, Volume, Density
FROM MULTIPLY BY TO OBTAIN
Pa, Pascal 0,001 kPa, kiloPascal
Pa, Pascal 0,000001 MPa, Mega Pascal
Pa, Pascal 0,00001 bar
Pa, Pascal 0,00010972 mH2O , metres of water
Pa, Pascal 0,000145038 psi, pound per square inch
bar 1,01325 atm, atmosphere
bar 0,980665
Kg/cm2, kilograms per square centimetre
bar 10,1972 mH2O , metres of water
bar 14,5038 psi, pound per square inch
atm, atmosphere 1,03323
Kg/cm2, kilograms per square centimetre
atm, atmosphere 10,3323 mH2O , metres of water
atm, atmosphere 14,6959 psi, pound per square inch
Kg/cm 210 mH2O , metres of water
Kg/cm 214,2233 psi, pound per square inch
mH2O 1,42233 psi, pound per square inch
TO OBTAIN DIVIDE BY
FROM
FROM MULTIPLY BY
TO OBTAIN
inches 0,0254 m, metres
inches 2,54 cm, centimetres
feet 0,3048 m, metres
feet 30,48 cm, centimetres
yards 0,9144 m, metres
square inches 0,00064516 m2, metri quadrati
square feet 0,09290304 m2, square metres
square inches 6,4516 cm2, square centimetres
square feet 929,0304 cm 2, square centimetres
square yards 0,8361274 m2, square metres
l, litres 0,001 m3, cubic metres
gallons 0,003789412 m3, cubic metres
cubic yards 0,7645549 m3, cubic metres
cubic feet 0,02831685 m3, cubic metres
cubic inches 0,0000164 m3, cubic metres
cubic inches 16,38706 cm 3, cubic centimetres
cubic feet 28,31685 l, litres
gallons 3,875412 l, litres
TO OBTAIN DIVIDE BY FROM
Pressure
Le
ngth, Area, Volume, Density
FROM MULTIPLY BY TO OBTAIN
Pa, Pascal 0,001 kPa, kiloPascal
Pa, Pascal 0,000001 MPa, Mega Pascal
Pa, Pascal 0,00001 bar
Pa, Pascal 0,00010972 mH2O , metres of water
Pa, Pascal 0,000145038 psi, pound per square inch
bar 1,01325 atm, atmosphere
bar 0,980665
Kg/cm2, kilograms per square centimetre
bar 10,1972 mH2O , metres of water
bar 14,5038 psi, pound per square inch
atm, atmosphere 1,03323
Kg/cm2, kilograms per square centimetre
atm, atmosphere 10,3323 mH2O , metres of water
atm, atmosphere 14,6959 psi, pound per square inch
Kg/cm 210 mH2O , metres of water
Kg/cm 214,2233 psi, pound per square inch
mH2O 1,42233 psi, pound per square inch
TO OBTAIN DIVIDE BY
FROM
Measurement conversion
chart:

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 18
Kv Values - DN 15
ART24LP
∆p across ART24 DN15 (KPa)
Flow (L/h)
2
0
17161514131211109876543
100
0,3
0,0
600
500
400
300
0,1
2,8
1,9
0,7
1,2
5 KPa
30 KPa
25 KPa
20 KPa
15 KPa
10 KPa
200
Control ∆P
Range
Flow Rate Kvs
l/h l/s GPM
5-30 kPa 50-600 0.04-0.167 0.22-2.65 3.6
Kv Values - DN 20
ART24LP
∆p across ART24 DN20 (KPa)
Flow (L/h)
2
0
17161514131211109876543
100
0,3
0,0
600
500
400
300
0,1
2,3
1,6
0,6
1,0
5 KPa
30 KPa
25 KPa
20 KPa
15 KPa
10 KPa
200
1000
900
800
700
6,3
5,1
4,0
3,1
18
Control ∆P
Range
Flow Rate Kvs
l/h l/s GPM
5-30 kPa 100-1000 0.028-0.278 0.44-4.41 4.0

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 19
Kv Values - DN 25
ART24LP
∆p across ART24 DN25 (KPa)
Flow (L/h)
2
0
1716151413121110976543
1000
0,3
0,0
1500
500
2,5
1,1
5 KPa
30 KPa
25 KPa
20 KPa
15 KPa
10 KPa
2500
2000
6,9
4,4
22212019 23 27262524 32313029 33 363534
Control ∆P
Range
Flow Rate Kvs
l/h l/s GPM
5-30 kPa 600-2500 0.167-0.694 2.65-11.02 9.5
Kv Values - DN 15
ART24HP
∆p across ART24 DN15 (KPa)
Flow (L/h)
2
0
16151413121110976543
0,3
0,0
600
1200
400
1000
1,2
11,1
7,7
4,9
20 KPa
200
60 KPa
50 KPa
40 KPa
30 KPa
Control ∆P
Range
Flow Rate Kvs
l/h l/s GPM
20-60 kPa 100-1200 0.028-0.333 0.44-2.29 3.6

Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specication of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 20
Kv Values - DN 20
ART24HP
Control ∆P
Range
Flow Rate Kvs
l/h l/s GPM
20-60 kPa 150-2000 0.042-0.556 0.66-8.82 4
Kv Values - DN 25
ART24HP
∆p across ART24 DN25 (KPa)
Flow (L/h)
2
0
17161514131211109876543
1000
0,3
0,0
1500
500
2,5
1,1
20 KPa
60 KPa
50 KPa
40 KPa
30 KPa
2500
2000
6,9
4,4
18 22212019 23 27262524 28 32313029 33
17,7
13,5
10,0
4000
3500
3000
Control ∆P
Range
Flow Rate Kvs
l/h l/s GPM
20-60 kPa 700-4200 0.194-1.167 3.09-18.52 9.5
∆p across ART24 DN20 (KPa)
Flow (L/h)
2
0
17161514131211109876543
200
1,0
0,0
1200
1000
800
600
0,3
9,0
6,3
2,3
4,0
20 KPa
400
2000
1800
1600
1400
25,0
20,3
16,0
12,3
18
60 KPa
50 KPa
40 KPa
30 KPa