Cimberio CIM 747 Instruction Manual

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
FIXED ORIFICE
BALANCING VALVE
747
Main features:
Cim 747 is used for balancing the flow in cooling, heating and domestic water systems.
Cim 747 is a combined manual presetting valve with following features:
• Fixed measurement orifice;
• Supplied with 2 pcs. of measuring nipples for needles;
• Handwheel with shut-off function and clear 360° reading;
• Digital scale with lock function;
• Measuring accuracy of fixed orifice ± 5%.
It is supplied with internal thread.
It is made of standard brass, “CR” brass (“CR” - Corrosion Resistant) and “NL” brass (“NL” -
No lead).
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 25
Approved by*:
Technical data:
Max. static working pressure 25 bar
Max. flow temperature 120 °C - 150°C (Cim 747OTS)
Min. temperature -10°C
Fluids: Water and Glycol
Material of parts in contact with water:
Valve body;
Spindle;
Cone, etc.
Materials:
“CR”Brass (EN 1982-CC752S)
Standard Brass (EN 1982-CC754S)
“NL” Brass (EN 1982-CC752S low lead)
O-rings: EPDM Perox
Threads: ISO 7
1
*Cim 747
Rev. 1 del 11/2013

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Models:
2
Cim 747 - Balancing valve - Fixed orifice - PN 25 - “CR” Brass
DN Material Thread Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
1/2” Rp 0.515 ÷ 1.75 1.80 DA02771015
20 3/4” Rp 0.842 ÷ 3.77 4.10 DA02771020
25 1” Rp 0.943 ÷ 6.96 7.50 DA02771025
32 1”1/4 Rp 1.316 ÷ 15.83 16.60 DA02771032
40 1”1/2 Rp 2.22 ÷ 21.05 23.00 DA02771040
50 2” Rp 2.51 ÷ 43.90 47.40 DA02771050
Cim 747OT - Balancing valve - Fixed orifice - PN 25
DN Material Thread Kv Kvs Technical Code
15
Standard Brass
EN 1982-CC754S
1/2” Rp 0.515 ÷ 1.75 1.80 DA02851015
20 3/4” Rp 0.842 ÷ 3.77 4.10 DA02851020
25 1” Rp 0.943 ÷ 6.96 7.50 DA02851025
32 1”1/4 Rp 1.316 ÷ 15.83 16.60 DA02851032
40 1”1/2 Rp 2.22 ÷ 21.05 23.00 DA02851040
50 2” Rp 2.51 ÷ 43.90 47.40 DA02851050
Cim 747NL - Balancing valve - Fixed orifice - PN 25 - “NL” Brass
DN Material Thread Kv Kvs Technical Code
15
NL Brass
EN 1982-CC752S
low lead
1/2” Rp 0.515 ÷ 1.75 1.80 DA03491015
20 3/4” Rp 0.842 ÷ 3.77 4.10 DA03491020
25 1” Rp 0.943 ÷ 6.96 7.50 DA03491025
32 1”1/4 Rp 1.316 ÷ 15.83 16.60 DA03491032
40 1”1/2 Rp 2.22 ÷ 21.05 23.00 DA03491040
50 2” Rp 2.51 ÷ 43.90 47.40 DA03491050
Cim 747H - Balancing valve - Fixed orifice - PN 25 - “CR” Brass - High flow
DN Material Thread Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
1/2” Rp 0.67 ÷ 3.19 4.10 DA03501015
20 3/4” Rp 1 ÷ 5.66 7.50 DA03501020
25 1” Rp 0.95 ÷ 11.10 16.60 DA03501025
32 1”1/4 Rp 1.16 ÷ 18.01 23.00 DA03501032
40 1”1/2 Rp 2.27 ÷ 27.81 44.00 DA03501040
50 2” Rp 1.82 ÷ 48.01 64.00 DA03501050
Cim 747OTS - Balancing valve for solar heating system - Fixed orifice - PN 25
DN Material Thread Kv Kvs Technical Code
15
Standard Brass
EN 1982-CC754S
1/2” Rp 0.515 ÷ 1.75 1.80 DA02831015
20 3/4” Rp 0.842 ÷ 3.77 4.10 DA02831020
25 1” Rp 0.943 ÷ 6.96 7.50 DA02831025
32 1”1/4 Rp 1.316 ÷ 15.83 16.60 DA02831032
40 1”1/2 Rp 2.22 ÷ 21.05 23.00 DA02831040
50 2” Rp 2.51 ÷ 43.90 47.40 DA02831050

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 3
Cim 745 - Balancing valve - Fixed orifice - PN 25 - “CR” Brass - with two plugs
DN Material Thread Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
1/2” Rp 0.515 ÷ 1.75 1.80 DA02761015
20 3/4” Rp 0.842 ÷ 3.77 4.10 DA02761020
25 1” Rp 0.943 ÷ 6.96 7.50 DA02761025
32 1”1/4 Rp 1.316 ÷ 15.83 16.60 DA02761032
40 1”1/2 Rp 2.22 ÷ 21.05 23.00 DA02761040
50 2” Rp 2.51 ÷ 43.90 47.40 DA02761050
Cim 748 - Balancing valve - Fixed orifice - PN 25 - “CR” Brass - with test point and drain
DN Material Thread Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
1/2” Rp 0.515 ÷ 1.75 1.80 DA02781015
20 3/4” Rp 0.842 ÷ 3.77 4.10 DA02781020
25 1” Rp 0.943 ÷ 6.96 7.50 DA02781025
32 1”1/4 Rp 1.316 ÷ 15.83 16.60 DA02781032
40 1”1/2 Rp 2.22 ÷ 21.05 23.00 DA02781040
50 2” Rp 2.51 ÷ 43.90 47.40 DA02781050
Cim 747PRS - Balancing valve - Fixed orifice - PN 25 - “CR” Brass - Press-fitting end
DN Material Press-fitting Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
15x15 0.515 ÷ 1.75 1.80 DA02935015
20 18x18 0.842 ÷ 3.77 4.10 DA02935018
20 22x22 0.842 ÷ 3.77 4.10 DA02935022
25 28x28 0.943 ÷ 6.96 7.50 DA02935028
32 35x35 1.316 ÷ 15.83 16.60 DA02935035
40 42x42 2.22 ÷ 21.05 23.00 DA02935042
50 54x54 2.51 ÷ 43.90 47.40 DA02935054
Cim 747OTPRS - Balancing valve - Fixed orifice - PN 25 - Press-fitting end
DN Material Press-fitting Kv Kvs Technical Code
15
Standard Brass
EN 1982-CC754S
15x15 0.515 ÷ 1.75 1.80 DA02935015
20 18x18 0.842 ÷ 3.77 4.10 DA02935018
20 22x22 0.842 ÷ 3.77 4.10 DA02935022
25 28x28 0.943 ÷ 6.96 7.50 DA02935028
32 35x35 1.316 ÷ 15.83 16.60 DA02935035
40 42x42 2.22 ÷ 21.05 23.00 DA02935042
50 54x54 2.51 ÷ 43.90 47.40 DA02935054
Cim 745PRS - Balancing valve - Fixed orifice - PN 25 - “CR” Brass - with two plugs -Press-fitting end
DN Material Press-fitting Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
15x15 0.515 ÷ 1.75 1.80 DA02995015
20 18x18 0.842 ÷ 3.77 4.10 DA02995018
20 22x22 0.842 ÷ 3.77 4.10 DA02995022
25 28x28 0.943 ÷ 6.96 7.50 DA02995028
32 35x35 1.316 ÷ 15.83 16.60 DA02995035
40 42x42 2.22 ÷ 21.05 23.00 DA02995042
50 54x54 2.51 ÷ 43.90 47.40 DA02995054

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Cim 748PRS - Balancing valve - Fixed orifice - PN 25 - “CR” Brass - with test point and drain -Press-
fitting end
DN Material Press-fitting Kv Kvs Technical Code
15
CR Brass
EN 1982-CC752S
15x15 0.515 ÷ 1.75 1.80 DA02955015
20 18x18 0.842 ÷ 3.77 4.10 DA02955018
20 22x22 0.842 ÷ 3.77 4.10 DA02955022
25 28x28 0.943 ÷ 6.96 7.50 DA02955028
32 35x35 1.316 ÷ 15.83 16.60 DA02955035
40 42x42 2.22 ÷ 21.05 23.00 DA02955042
50 54x54 2.51 ÷ 43.90 47.40 DA02955054
4
Cross section:
1
6
4 3
5
7
8
9
2
10
12
11
14
15
16
13
19
18
17
1. Valve body
2. Bonnet
3. Gasket support
4. Gasket
5. Stem for shutter
6. Shutter
7. Stem
8. O-ring
9. O- ring
10. Turn index
11. Spacer
12. Tenths turn index
13. Knob
14. Pin
15. Index
16. Entrainer
17. O-ring
18. Memory
19. Cup
20. Blue binder point
21. Red binder point
Installation procedure:
Before installation of Cim 747, check that inside the valve and the pipes there are no foreign
matters which might damage the tightness of the valve.
When installing the valve, please make sure to have a pipe length 5 times the DN upstream
the valve and 2 times the DN downstream, and pay attention to the arrow direction casted
on the valve body, which shall be the same as the flow one.
Burr pipe connections after having threaded them and distribute the sealing material on
pipe threads only and not on valve threads.
For assembly purposes, use a spanner, not a pipe wrench, by applying necessary work-
ing torque only on the valve end nearest 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.

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 5
Regulating:
To close the valve, rotate clockwise the handle until the stop. Looking at the data showed
in the herewith attached diagrams, it is possible to regulate the flow by rotating the handle
anticlockwise until the required flow rate is reached.
The reading of this flow rate can be done by using the differential manometer Cim 726.
This interfaces with the balancing valve through two sensors inserted in the binder points
(Kvs) placed before and after the calibrated diaphragm of the valve.
The main index scale showing values from 0 up to 8 of the handle, states the turns of
opening of the obturator, while the second circular one from 0 up to 9 registers the tenths
of one turn.
The position of the handle for the required flow rate can be memorized by an Allen Key 6
mm.

Sizing:
K
V
K
VS valve
K
VS orifice
Kvs valve -Kv across the cone
Kvs orifice - Kv across orifices
Kv - Kv include orifice and cone.
FLOW COEFFICIENT
Kv, in metric system represents the flow in m3/h of water at the temperature of 15.5°C
(density =998 kg/m3) which causes a pressure drop of 1 bar. In the 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

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Δ
pb Pressure drop across Cim 747
Δ
pm Pressure drop across the control valve
Δ
pc Necessary pressure for the circuit
Δ
pa Available pressure for the riser
Δ
pa
= Δp b + Δp c + Δp m
Δ
pa
Δ
pb
Δ
pm
Δ
pc
Q
EXAMPLE
It is required to balance the circuit in the figure, the given data are:
• Necessary pressure for the circuit: ∆pc=13 kPa;
• Available pressure for the riser: ∆pa=35 kPa;
• Pressure drop across the control valve: ∆pm= 10 Kpa;
• Flow rate: Q= 3 m3/h=0.833 l/s.
The required differential pressure across the balancing valve can be calculated using the
following relation:
the required Kv is:
Using the attached tables to this datasheet, it is possible to find the following available
valves with the relative position of the handle:
• Cim 747 DN 32 --> Preset: 4.8 (Kv=8.49);
• Cim 747 DN 40 --> Preset: 4.0 (Kv=8.86);
• Cim 747 DN 50 --> Preset: 3.0 (Kv=8.84);
The three selected models are comparable. As a general rule, it is better to choose the
valve with the smallest diameter, in this way the valve will be quite opened and there will
be no problem with noises and cavitations.
Measuring the pressure drop across the binders of the Cim 747 DN 32, the operator will
find this value:
6
SUGGESTED VALUES AND TIPS:
• Pressure drop across the valve:
Max = 50 kPa
• Pressure drop across the binders:
Max = 50 kPa
Min = 1 kPa
• Velocities in the pipeline:
Max = 1.15 m/s
Min = 0.75 m/s
For the preliminary sizings where the
value of pressure drop across the valve
is not known, use a value of 10 kPa.
Kv (flow rate in m
3
/h @ 1bar pressure drop)
Full turn Tenths of turn
0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9
2 1,316 1,486 1,655 1,825 1,995 2,165 2,334 2,504 2,674 2,843
3 3,013 3,288 3,564 3,839 4,115 4,390 4,666 4,941 5,217 5,492
4 5,768 6,108 6,449 6,789 7,129 7,469 7,810 8,150 8,490 8,831
5 9,171 9,484 9,797 10,110 10,423 10,736 11,048 11,361 11,674 11,987
6 12,300 12,526 12,752 12,978 13,204 13,430 13,656 13,882 14,108 14,334
7 14,560 14,687 14,814 14,941 15,068 15,195 15,322 15,449 15,576 15,703
8 15,830
Example

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 7
Pressure-temperature
ratings:
p [bar]
4
0
T [°C]
20
40
60
80
100
120
140
160
180
8 12 16 20 24 282 6 10 14 18 22 26
58 116 174 232 290 349 406 29 87 145 203 261 319 377
p [lbf/in ]
0
0
2
32
38
104
140
176
212
248
284
320
356
T [°F]
Cim 747OTS only
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
Len
gth, 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:

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 8
Kv Values - DN 15
Cim 747
Cim 747OT
Cim 747NL
Cim 747OTS
Cim 745
Cim 748
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
Kvs=1.80
36
P
V
K
=
Q
0.08 0.80.60.40.2 0.040.02 0.06
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.01 0.1
1
0.1
Pressure Loss - ∆p (kPa)
1
10
100
Flow rate - Q (l/s)
Turns N° 7-865432
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
20.515 0.549 0.583 0.617 0.650 0.684 0.718 0.752 0.786 0.820
30.854 0.888 0.922 0.956 0.989 1.023 1.057 1.091 1.125 1.159
40.193 1.219 1.245 1.271 1.297 1.324 1.350 1.376 1.402 1.428
51.454 1.473 1.491 1.510 1.528 1.547 1.565 1.583 1.602 1.620
61.639 1.647 1.656 1.664 1.672 1.681 1.689 1.698 1.706 1.715
71.723 1.726 1.729 1.732 1.735 1.738 1.741 1.744 1.747 1.750
8

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 9
Kv Values - DN 20
Cim 747
Cim 747OT
Cim 747NL
Cim 747OTS
Cim 745
Cim 748
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
Kvs=4.10
36
P
V
K
=
Q
0.08 0.060.04
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.02 0.1
1
0.1
Pressure Loss - ∆p (kPa)
2
10
100
Flow rate - Q (l/s)
0.2 0.4 0.6 0.8 1
Turns N° 7-865432
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
20.842 0.918 0.993 1.069 1.144 1.220 1.295 1.370 1.446 1.521
31.597 1.684 1.771 1.858 1.945 2.033 2.120 2.207 2.294 2.381
42.468 2.535 2.602 2.669 2.736 2.804 2.871 2.938 3.005 3.072
53.139 3.179 3.220 3.261 3.301 3.342 3.382 3.423 3.464 3.504
63.545 3.559 3.574 3.588 3.602 3.616 3.631 3.645 3.659 3.674
73.688 3.696 3.705 3.713 3.722 3.730 3.738 3.747 3.755 3.764
83.772

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 10
Kv Values - DN 25
Cim 747
Cim 747OT
Cim 747NL
Cim 747OTS
Cim 745
Cim 748
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
Kvs=7.50
36
P
V
K
=
Q
0.08 0.060.04
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.02 0.1
1
0.1
Pressure Loss - ∆p (kPa)
2
10
100
Flow rate - Q (l/s)
0.2 0.4 0.6 0.8 1
Turns N° 8765432
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
20.943 1.052 1.162 1.271 1.380 1.490 1.599 1.709 1.818 1.927
32.037 2.179 2.322 2.465 2.607 2.750 2.892 3.035 3.178 3.320
43.463 3.615 3.767 3.919 4.072 4.224 4.376 4.528 4.681 4.833
54.985 5.099 5.213 5.327 5.441 5.554 5.668 5.782 5.896 6.010
66.124 6.183 6.241 6.300 6.358 6.417 6.476 6.534 6.593 6.651
76.710 6.735 6.761 6.786 6.811 6.837 6.862 6.887 6.913 6.938
86.963

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 11
Kv Values - DN 32
Cim 747
Cim 747OT
Cim 747NL
Cim 747OTS
Cim 745
Cim 748
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
Kvs=16.6
36
P
V
K
=
Q
0.08 0.80.60.40.20.06
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.1
1
0.1
Pressure Loss - ∆p (kPa)
1
10
100
Flow rate - Q (l/s)
2 3 4 6
Turns N° 8765432
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
21.316 1.486 1.655 1.825 1.995 2.165 2.334 2.504 2.674 2.843
33.013 3.228 3.564 3.839 4.115 4.390 4.666 4.941 5.217 5.492
45.768 6.108 6.449 6.789 7.129 7.469 7.810 8.150 8.490 8.831
59.171 9.484 9.797 10.110 10.423 10.736 11.048 11.361 11.674 11.987
612.300 12.526 12.752 12.978 13.204 13.430 13.656 13.882 14.108 14.334
714.560 14.687 14.814 14.941 15.068 15.195 15.322 15.449 15.576 15.703
815.830

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A. 12
Kv Values - DN 40
Cim 747
Cim 747OT
Cim 747NL
Cim 747OTS
Cim 745
Cim 748
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
Kvs=23.00
36
P
V
K
=
Q
0.80.60.40.2
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.1
1
0.1
Pressure Loss - ∆p (kPa)
1
10
100
Flow rate - Q (l/s)
2 3 4 6 8 10
Turns N° 8765432
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
22.220 2.473 2.726 2.979 3.232 3.485 3.738 3.991 4.244 4.497
34.750 5.161 5.572 5.983 6.394 6.805 7.216 7.627 8.038 8.449
48.860 9.294 9.728 10.162 10.596 11.030 11.464 11.898 12.332 12.766
513.200 13.523 13.846 14.169 14.492 14.815 15.138 15.461 15.784 16.107
616.430 16.717 17.004 17.291 17.578 17.865 18.152 18.439 18.726 19.013
719.300 19.475 19.650 19.825 20.000 20.175 20.350 20.525 20.700 20.875
821.050

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 50
Cim 747
Cim 747OT
Cim 747NL
Cim 747OTS
Cim 745
Cim 748
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
13
Kvs=47.40
36
P
V
=
QK
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
1
0.1
Pressure Loss - ∆p (kPa)
2
10
100
Flow rate - Q (l/s)
0.2 0.4 0.6 0.8 1
3 4 6 8 10 20
Turns N° 8765432
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
22.510 3.143 3.776 4.409 5.042 5.675 6.308 6.941 7.574 8.207
38.840 9.656 10.472 11.288 12.104 12.920 13.736 14.552 15.368 16.184
417.000 17.924 18.848 19.772 20.696 21.620 22.544 23.468 24.392 25.316
526.240 27.063 27.886 28.709 29.532 30.355 31.178 32.001 32.824 33.647
634.470 35.048 35.626 36.204 36.782 37.360 37.938 38.516 39.094 39.672
740.250 40.615 40.980 41.345 41.710 42.075 42.440 42.805 43.170 43.535
843.900

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 15
Cim 747H
14
Kvs=4.10
36
P
V
K
=
Q
0.08 0.060.04
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.02 0.1
1
0.1
Pressure Loss - ∆p (kPa)
2
10
100
Flow rate - Q (l/s)
0.2 0.4 0.6 0.8 1
Turns N° 8765432
(25% OPEN)
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
20.67 0.71 0.75 0.78 0.82 0.86 0.90 0.95 0.99 1.03
31.08 1.13 1.17 1.21 1.25 1.31 1.35 1.41 1.45 1.50
41.54 1.59 1.63 1.68 1.72 1.77 1.83 1.88 1.92 1.97
52.00 2.04 2.08 2.13 2.18 2.23 2.28 2.32 2.37 2.40
62.44 2.48 2.52 2.55 2.59 2.62 2.67 2.71 2.75 2.79
72.82 2.91 2.94 2.99 3.02 3.06 3.08 3.11 3.15 3.18
83.19

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 20
Cim 747H
15
Kvs=7.50
36
P
V
K
=
Q
0.08 0.060.04
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.02 0.1
1
0.1
Pressure Loss - ∆p (kPa)
2
10
100
Flow rate - Q (l/s)
0.2 0.4 0.6 0.8 1
Turns N° 8765432
(25% OPEN)
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
21.00 1.09 1.16 1.24 1.31 1.41 1.50 1.60 1.69 1.78
31.87 1.96 2.06 2.16 2.25 2.38 2.48 2.60 2.68 2.78
42.88 2.96 3.08 3.19 3.29 3.42 3.52 3.62 3.72 3.77
53.88 3.96 4.06 4.17 4.25 4.35 4.44 4.54 4.61 4.69
64.74 4.80 4.88 4.94 5.02 5.10 5.17 5.24 5.29 5.31
75.34 5.37 5.43 5.44 5.49 5.54 5.57 5.60 5.63 5.64
85.66

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 25
Cim 747H
16
Kvs=16.60
0.80.60.40.2
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.1
1
0.1
Pressure Loss - ∆p (kPa)
1
10
100
Flow rate - Q (l/s)
2 3 4 6 8 10
Turns N° 8765432
36
P
V
K
=
Q
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
20.95 1.02 1.10 1.20 1.31 1.40 1.50 1.62 1.74 1.87
32.00 2.11 2.26 2.40 2.57 2.73 2.88 3.06 3.21 3.39
43.55 3.74 3.92 4.07 4.29 4.49 4.69 4.88 5.10 5.34
55.51 5.74 5.97 6.25 6.52 6.79 7.08 7.33 7.56 7.81
68.05 8.23 8.42 8.64 8.82 9.16 9.38 9.52 9.77 9.90
710.00 10.15 10.24 10.37 10.55 10.68 10.79 10.96 11.03 11.06
811.10

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 32
Cim 747H
17
Kvs=23.00
0.80.60.40.2
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.1
1
0.1
Pressure Loss - ∆p (kPa)
1
10
100
Flow rate - Q (l/s)
2 3 4 6 8 10
Turns N° 8765 4
3
2
36
P
V
K
=
Q
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
21.16 1.28 1.42 1.57 1.73 1.88 2.07 2.24 2.45 2.69
32.91 3.15 3.42 3.68 3.95 4.21 4.50 4.80 5.10 5.41
45.76 6.08 6.39 6.70 7.06 7.44 7.81 8.11 8.48 8.84
59.27 9.67 10.00 10.45 10.86 11.23 11.65 12.02 12.44 12.75
613.16 13.48 13.84 14.21 14.49 14.85 15.15 15.30 15.65 15.87
716.22 16.41 16.63 16.88 17.15 17.36 17.49 17.75 17.80 17.89
818.01

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 40
Cim 747H
18
Kvs=44.00
36
P
V
K
=
Q
0.80.60.40.2
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
0.1
1
0.1
Pressure Loss - ∆p (kPa)
1
10
100
Flow rate - Q (l/s)
2 3 4 6 8 10
Turns N° 8765432
Kvs (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
22.27 2.44 2.62 2.81 3.04 3.27 3.52 3.76 4.11 4.43
34.78 5.12 5.49 5.91 6.29 6.72 7.15 7.57 8.06 8.48
48.92 9.49 9.91 10.39 10.92 11.36 11.92 12.46 12.95 13.37
513.91 14.36 14.86 15.38 15.88 16.40 16.87 17.65 18.36 18.92
618.96 19.48 19.81 20.30 20.77 21.22 21.78 22.34 22.80 23.29
723.73 24.03 24.53 24.83 25.30 25.78 26.23 26.59 27.12 27.41
827.81

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Kv Values - DN 50
Cim 747H
19
Kvs=64.00
20
30
40
50
60
80
0.2
0.3
0.4
0.5
0.6
0.8
8
6
5
4
3
2
1
0.1
Pressure Loss - ∆p (kPa)
2
10
100
Flow rate - Q (l/s)
0.2 0.4 0.6 0.8 1
3 4 6 8 10 20
Turns N° 8765432
36
P
V
K
=
Q
Kv (Flow rate in m3/h @ 1 bar pressure drop)
Full turn Tenths of turn
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
21.82 2.29 2.87 3.42 4.04 4.61 5.28 5.90 6.61 7.29
38.01 8.86 9.59 10.45 11.21 12.09 13.05 13.98 14.98 15.79
416.52 17.50 18.52 19.44 20.36 21.43 22.50 23.41 14.33 25.30
526.28 27.21 28.19 29.28 30.21 31.13 32.00 33.05 33.94 34.84
635.80 36.09 36.66 37.52 38.41 39.42 40.12 40.83 41.46 42.16
742.77 43.37 44.04 44.52 45.15 45.83 46.33 46.93 47.39 47.75
848.01

technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
Main dimensions:
Cim 747
Cim 747OT
Cim 747NL
Cim 747 H
Cim 747OTS
Cim 745
Cim 748
Main dimensions:
Cim 747PRS
Cim 747OTPRS
Cim 745PRS
Cim 748PRS
DN 15 20 25 32 40 50
Grms. 700 980 1140 1660 2500 3740
A 51 51 51 51 57 57
B 111 128 138 141.5 181 190.5
C 85 97 113 144 163 193
C1 163 187 188 208.5 260 281.5
D 16.5 18 21 23 23 28
E 184 215 223 244 308 337
CH 28 33 40 51 56 71
DN 15x15 18x18 22x22 28x28 35x35 42x42 50x50
Grms. 865 1175 1200 1480 2145 3090 4760
A 51 51 51 51 51 57 57
B 111 129 129 138 142 181 190
C 169 182 190 207 238 266 313
C1 205 229 233 235 256 307 329
P 39.8 41.3 44 44 43 48 54
CH 28 33 33 40 43 56 71
20