ballorex® dynamic - bouwproducten.nl a flow meter the venturi’s kv-value is entered once, ... it...

BALLOREX® Dynamic

5.1

5.1.1 Perfect flow with dynamic balancingBROEN BALLOREX® Dynamic is a combined pressure independent flow limiter and control valve. The new and innovative range of dynamic balancing valves operates independently of changes in system pressure in water-based cooling or heating systems.

BROEN BALLOREX® Dynamic can operate either as an automatic flow limiter and control valve or alternatively without the actuator, simply as an automatic flow limiter.

Automatic flow limiter and control valve Installed with an actuator the BROEN BALLOREX® Dynamic combines an automatic flow limiter and a 2-port control valve in one. With full control authority the valve reacts instantly and adjusts the flow as signalled by the Building Management System (BMS). Since the setting of the valve is done by a horizontal reduction of the inlet area, it has no effect on the actuators vertical stroke length. Combined with the built-in pressure regulator this provides 100% control authority in all situations.

Automatic flow limiter Without actuator BROEN BALLOREX® Dynamic is an automatic flow limiter. The designed max. flow is easily set on the valve. Due to direct flow measuring the valve can be set with a unique accuracy of +/- 3%, when using a flow meter. The BROEN BALLOREX® Dynamic ensures that the pre-set flow rate is not exceeded at any point, and automatically compensates for pressure fluctuations in the system.

5.1.2 BALLOREX® Dynamic benefits» Direct flow measuring Within an accuracy of +/- 3% the flow through the valve can be directly measured. No better way to verify the valve setting, and to provide best in class trouble shooting. Also provides possibility of optimum pump setting and reduced energy consumption.» Commissioning is no longer needed Just set the valve to the designed flow, and hydronic balance is secured.» Automatic balancing Built-in differential pressure regulator corrects for pressure fluctuations in the system, and secures constant regulated flow rates.» Easy valve selection Just select a valve with a flow range that covers the design flow.» Perfect flow control 100% valve authority and full stroke independent of pre-setting for the modulating actuator provides the best premise for high indoor climate comfort. » Flexible installation The valve can be installed in any position, as long as flow direction is respected, and can be installed directly onto bends, reducers, and flexible hoses. » Different inserts are colour coded Inserts are easy identifiable

5.1 Introduction

BALLOREX® Dynamic

5.2.1 Direct flow measurementA unique feature of BROEN BALLOREX® Dynamic is the integrated Venturi measuring orifice, which allows direct flow measurement at any time. With direct flow measurement, actual flow rates can be measured for correct documentation. Also trouble shooting becomes considerably easier whereby time is saved.

Just connect a flow meter, enter the fixed Kv-value of the integrated Venturi orifice, and the flow will be directly displayed on the flowmeter at an accuracy of +/- 3%.

With BROEN BALLOREX® Dynamic time consuming valve selection and commissioning procedures are history. Just select the BROEN BALLOREX® Dynamic valve suitable for the designed flow and set the valve. Setting the BROEN BALLOREX® Dynamic valve is precise and easily done, simply by turning the pre-setting tool on top of the valve until the required flow is available. The required flow and the balance in the system is hereafter provided by the BROEN BALLOREX® Dynamic valve regardless of pressure fluctuations in the system.

The clever design of BROEN BALLOREX® Dynamic guarantees full control authority and thus provides the premise for constant and precise indoor thermal comfort under all conditions.

5.2 Flow measuring

5.2

BALLOREX® Dynamic

5.2.2 Venturi principle The integrated Venturi orifice enables direct flow measuring. Direct flow measurement also provides the premise for precise valve setting and easy trouble shooting. The Venturi measuring orifice exploits Bernoulli’s Principle:”A fluid speeds up as it moves through a constricted space. As the speed of the fluid increases, it’s pressure drops.”

In the Venturi valve the pressure drop across the orifice is measured where the pressure is at it’s highest and lowest respectively. The trumpet shape of the Venturi recovers a substantial part of the pressure, which provides a strong measuring signal at a low total pressure loss.

Direct flow measurement is not affected by the changing of the valve setting, since the Kv-value between the measuring points remains constant. The Kv-value is changed elsewhere in the valve to regulate the flow.

Flow equation

Q = Kv * √Δp

Q: The flow [m3/h] to be calculated.

Kv: The Venturi coefficient, which defines the flow capacity through the Venturi. It is determined by the smallest diameter in the Venturi and remains constant since changed valve setting does not change the diameter.

ΔP: Differential pressure measured across the Venturi orifice.

On a flow meter the Venturi’s Kv-value is entered once, and the flow will be displayed directly on the flow meter. If the valve setting is changed, the new flow will be displayed directly, since the Kv-value across the measuring points remains constant and only the differential pressure changes.

5.2 Flow measuring

ΔP - valveTotal pressure loss across the open valve.Part of the pressure is recovered by the Venturi.

ΔP - Venturi Measured signal across Venturi orifice.Strong signal gives high accuracy measurement.

High speed - Low pressureLow speed - High pressure

5.2

BALLOREX® Dynamic

5.3.1 DesignAutomatic flow limiter and control valveSince the setting of the valve is done by a horizontal reduction of the inlet area, it has no effect on the actuators vertical stroke length. Combined with the built-in pressure regulator this provides 100% control authority in all situations.

A) 100% control valve authorityThe actuator has 100% control authority and full actuator stroke, regardless of the pre-setting. Therefore the valve will react instantly to the signal from the BMS and adjust the flow accordingly.

B) Direct flow measuringTest points for flow meter connection.

C) Flow limiterSetting the design flow rate is simple and easily done with the enclosed pre-setting tool.

D) Integrated VenturiThe Venturi orifice enables direct flow measuring.

E) Differential pressure regulatorThe integrated regulator maintains a constant differential pressure across the valve opening. The required flow is thereby kept constant regardless of pressure fluctuations in the system.

5.3 Product utilities

5.3

B

A

C

ED

BALLOREX® Dynamic5.3 Product utilities

5.3.2 Sizing & selection

Selecting the right valve dimension is very simple when using BALLOREX® Dynamic. Once the design flow has been calculated you simply select a valve with a flow range that fits the required flow rate. Flow rates for a given room or building are typically calculated as follows: Example Heating system for a room of 37 m x 14 m. Heat Loss: 40 W/m2 Supply side temperature: 80ºC Return side temperature: 60ºC Calculation of flow rate: Q: Design flow m3/h Φ: Heat loss [kW] (room) ts: Media temperature, supply side tr: Media temperature, return side Q = Φ x 0,861* / Δt (ts- tr) *Factor for converting kW to kcal/h Q = (0,04 x (37 x 14)) x 0,86 / (80-60) Q = 0,890 m3/h | 0,247 l/s | 890 l/h

Flow diagram

Black curveIndicates the flow rate at a given valve setting.

ExampleA valve with a design flow rate of 0,247 l/s is required. The black curve shows that a BALLOREX Dynamic DN 15H delivers 0,247 l/s when set to 32%.

5.3

0,01

0,02

0,03

0,04

0,05

0,060,07

0,09 0,2 0,3 0,4

0,1

0,08

DN15 Low �ow

DN15 High �ow

DN15 Standard �ow

36

72 108

144

180

216252

324 720 1080 1440

360

288 l/h

l/s

0

10

20

30

40

50

60

70

80

90

100

0,1 0,15 0,2 0,25 0,35

1260900720540360

l/sl/h

Valve setting

0,3

1080

0,40

1440

BALLOREX® Dynamic

5.3.4 Valve settingBefore setting the max. flow rates on the valves ensure: » The pump is set to it’s max capacity. » All valves in the system are fully opened. Make sure the differential pressure across each valve does not exceed the range specified in the product data sheet.

The design flow rate is easily adjusted with the enclosed pre-setting tool.

Precise setting of the valve

Connect the flow meter to the valve and enter the Venturi Kv-value. Turn the pre-setting tool until the flow meter displays the required flow rate.


5.3.3 Installation and system flushing The BALLOREX® Dynamic valves are easy installed. No upstream or downstream straight pipe lengths are required, so bends, reducers, flexible hoses etc. can be mounted directly onto the valve. Due to the clever design and the IP54 water proof actuators, BALLOREX® Dynamic can be oriented in all positions 360º around the pipe axis.

It is recommend to flush the valve with the cartridge removed, and to build in strainers to protect terminal units and valves. Make sure to clean all filters/strainers after flushing.

After flushing the system the blind cap is removed. Do not throw it away - the blind cap also serves as presetting tool.

The cartridge that covers the design flow rate is inserted and tightened carefully.

5.3

BALLOREX® Dynamic

Rough pre-setting

To find the right setting, the design flow rate is looked up in a flow diagram.

For a BALLOREX Dynamic 890 l/h corresponds to a setting of approx. 40% on a DN 15H valve. Consult the flow diagram to find the correct setting for the design flow rate required.

The scale on the presetting tool, is read against the marking on the brass housing on the valve. Each marking on the scale indicates 10%.

5.3.5 Pump settingThe balancing procedure as such becomes unnecessary when installing BALLOREX® Dynamic. The valves are simply set to the required flow rate, and will compensate for pressure fluctuations in the system. Therefore the hydronic balance in the system is ensured.

When all valves are set to the required flow rate, the pump head should be minimized in order to avoid unnecessary energy consumption.

This ensures that the pump head is reduced to the optimal point, which is where the pump delivers only as much pressure as the index valve needs to be working properly.

The optimal pump setting is easily found when commissioning BALLOREX® Dynamic.

When setting the BALLOREX® Dynamic valves the pump is set to its max. capacity. After setting all valves the flow meter is connected to the index valve, which is the valve that has the least differential pressure available. Typically it would be the valve placed highest and most remote from the pump.

The pump is then adjusted downwards until the flow on the index valve starts to decrease. This point is the minimum pressure required, where the operating range of the valve starts. To be sure that sufficient pressure is available the pump is adjusted slightly back upwards until the design flow rate is displayed on the flowmeter again.

Hydronic balance is now provided bythe BALLOREX® Dynamic valves and the pump head kept at a minimum.


5.3

Setting = 100% Setting = 40%

TU TU TUTU

TU=Thermal unit

BALLOREX® Dynamic 5.4 Product data sheet

5.4

0,01

0,02

0,03

0,04

0,05

0,060,07

0,09 0,2 0,3 0,4

0,1

0,08

DN15 Low �ow

DN15 High �ow

DN15 Standard �ow

3672 108

144

180

216252

324 720 1080 1440

360

288 l/h

l/s

5.4.1 Product finder

Flow rangeDimension Color code Section

l/s l/h

0,01 - 0,033 36 - 118 DN 15L White 5.2.1

0,02 - 0,125 72 - 450 DN 15S Red 5.2.2

0,083 - 0,39 300 - 1400 DN 15H Black 5.2.3

Marking on valve: DN, PN, flow direction, DR, BROEN

Connection: Female thread ISO 7/1 parallel

5.4

Pressure & temperature

Max. temperature 120°C

Min. temperature -20°C

Pressure class PN 25

Operating presssure 30-400 kPa

Material

Valve housing DR Brass CW602N

Cartridge PPS

Sealings EPDM

Membrane Reinforced EPDM

BALLOREX® Dynamic 5.4.2 DN 15L - low flow

BROEN No. Dimension Nom. Inch Venturi Kv

Flow range Flow range

l/h I/s

4360000L-000001 DN 15L 1/2” 0,23 36 - 118 0,01 - 0,033

BROEN No. Dimension Description

43600000-000001 DN 15 Valve housing with blind cap

436000LL-000001 DN 15L Flow Cartridge (color code = white)

436000114360001243600013

DN 15 DN 15 DN 15

Modulating actuator 24 V (0-10 V control voltage)On/Off actuator 230 V On/Off actuator 24 V

83504006-00000383504007-000003

DN 15 x 15DN 15 x 18

Pre-sealed press adaptors (2 pcs). M-profile, max. 16 bar

43500200-001003 DN 15 High capacity drain valve (Kv 4,5) 1/2 “ female/female threaded connection

Accessories

76mm

35mm

95mm

5.4 Product data sheet

5.4

Flow Diagram

0,005 0,01 0,015 0,02 0,025 0,03 0,0350

10

20

30

40

50

60

70

80

90

100

11810890725436

4

8

12

16

20

24

28

32

36

l/s

kPa

l/h

= Venturi signal

Valve setting

22 kPa

Black curveIndicates the flow rate for a given valve setting.

Red curvePrecise setting of the valve is easily done with a flow meter. Simply enter the Venturi Kv (0,23) and turn the pre-setting tool until the design flow is displayed on the flowmeter. For valve setting with a differential pressure mano-meter, the red curve indicates the Venturi signal to be measured on the valve for a given flow.

ExampleA valve with a design flow rate of 0,03 l/s is required. The black curve shows that a BALLOREX® Dynamic DN 15L delivers 0,03 l/s when set to 70%.

At the same flow rate the red curve indicates that the 0,03 l/s are flowing through the valve when 22 kPa is measured.

70 %

BALLOREX® Dynamic DN 15L - low flow

5.4

BALLOREX® Dynamic

5.4.3 DN 15S - standard flow







Material


Cartridge PPS

Sealings EPDM




l/h I/s

4360000S-000001 DN 15S 1/2” 0,78 72 - 450 0,02 - 0,125



436000SS-000001 DN 15S Flow Cartridge (color code = red)

436000114360001243600013

DN 15 DN 15 DN 15


83504006-00000383504007-000003

DN 15 x 15DN 15 x 18



Accessories

76mm

35mm

95mm

5.4

0,02 0,03 0,04 0,05 0,06 0,07 0,08 0,09 0,1 0,11 0,12 0,1250

10

20

30

40

50

60

70

80

90

100

72 108 144 180 216 252 288 324 360 396 432 450l/sl/h

Valve setting

4

8

12

16

20

24

28

32

36

kPa

= Venturi signal

Black curveIndicates what valve setting will provide which flow rate.


Flow Diagram

BALLOREX® Dynamic

DN 15S - standard flow

5.4

BALLOREX® Dynamic

5.4.4 DN 15H - High flow







Material


Cartridge PPS

Sealings EPDM




l/h I/s

4360000H-000001 DN 15H 1/2” 2,5 300 - 400 0,083 - 0,39



436000HH-000001 DN 15H Flow Cartridge (color code = black)

436000114360001243600013

DN 15 DN 15 DN 15


83504006-00000383504007-000003

DN 15 x 15DN 15 x 18



Accessories

76mm

35mm

95mm

5.4

Flow Diagram

0

10

20

30

40

50

60

70

80

90

100

0,1 0,15 0,2 0,25 0,35

1260900720540360

4

8

12

16

20

24

28

32

36

l/s

kPa

l/h

= Venturi signal

Valve setting

0,3

1080

0,40

1440

Black curveIndicates what valve setting will provide which flow rate.


BALLOREX® Dynamic

DN 15H - High flow

BALLOREX® Dynamic

The BALLOREX® Dynamic is a combined flow limiter and control valve with distinct advantages, such as direct flow measurement, flexible installation and easy flow setting. The BALLOREX® Dynamic can be used in numerous types of applications. The most common are illustrated below.

Combined flow limiter and control valve on terminal units When installed with an actuator the BALLOREX ® Dynamic is a combined flow limiter and control valve on air handling units, chilled ceilings, fan coil units etc. With the modulating actuator BALLOREX® Dynamic has full control authority and also ensures the required flow on every terminal unit. The 2-port control valve that would normally be installed becomes redundant.The built-in pressure controller maintains the flow constant, and ensures hydronic balance in the system regardless of pressure fluctuations.

Automatic flow limiter on terminal units with 2-port control valve

The built-in pressure controller ensures the max. flow rate is never exceeded, and ensures hydronic balance in the system regardless of pressure fluctuations. A 2-port control valve connected to the BMS is installed to control the flow.

5.5 Application examples

5.5

BMS

BMS

BALLOREX® Dynamic

Automatic flow limiter on terminal units with 3-port control valve

The built-in pressure controller ensures the max. flow rate is never exceeded, and ensures hydronic balance in the system regardless of pressure fluctuations. A 3-port control valve connected to the BMS is installed to control the flow.

One pipe heating system

Installed without actuator in a one pipe heating system BALLOREX® Dynamic does the job as automatic flow limiter on the riser. Just set the required flow and the built-in regulator ensures hydronic balance.


5.5

BMS

BALLOREX® Dynamic

Under floor heating

The built-in pressure controller maintains the set flow rate constant, and so ensures hydronic balance in each heating circuit. With the modulating actuator BALLOREX® Dynamic has full control authority and also ensures the required flow in each circuit.


5.5

BMS

BALLOREX® Dynamic5.6 ActuatorsActuators for BALLOREX Dynamic® valves are supplied as follows:

Common features for all actuators: » Normally closed » Waterproof IP 54 » 360º installation position » Maintenance-free » Compact design

Flow vs. VoltageSince the setting of the valve is done by a horizontal reduction of the inlet area, it has no effect on the actuators vertical stroke length. Combined with the built-in pressure regulator this provides 100% control authority in all situations.

Below the diagram shows the typical modulating characteristic of BALLOREX® Dynamic, the data is based on the properties of a BALLOREX® Dynamic DN 15H. The diagram shows how much flow is allowed through the valve at the different control voltages.

ExampleA BALLOREX® Dynamic DN 15H is set to provide a flow rate of 890 l/h. To find the flow at an actuator position of 1 V, a look-up in the graph shows that 19% of the pre-set flow will pass through the valve at 1 V.

890 l/h x 19% = 169,1 l/h

Item no. Description

43600011 Modulation actuator 24 V operating voltage

43600012 On/off actuator 230 V operating voltage

43600013 On/off actuator 24 V operating voltage

5.6

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 1000

1

2

3

4

5

6

7

8

9

10

% of set �ow

Voltage

BALLOREX® Dynamic 5.6 Actuators

Modulating actuator 24 V operating voltage

Thermo-electronic actuator for opening and closing valves in a direct proportion to the applied control voltage.Powerless control is by a 0-10V DC signal which is provided either by a room thermostat or, in most cases, by a central BMS system. If a control voltage is applied, the actuator opens the valve proportionally to the detected actuator travel.

Operating voltage 24 V AC, 50-60 Hz

Base position Normally closed

Operating power 2 W

Average actuation delay 30 s/mm

Control voltage 0-10 V DC

Actuator travel 4 mm

Actuating force 100 N+/-5%

Ambient temperature 0 to +60°C

Protection Class IP 54

CE conformity EN 60730

Connecting cable White /1 m/30 g

The actuator mechanism uses a PTC resistor-heated wax element and a compression spring. The wax element is heated by applying the operating voltage and moves the integrated piston. The force generated by this movement is transferred to the piston, thus opening or closing the valve.

5.6

Stro

ke (m

m)

BALLOREX® Dynamic

In its delivery condition, the actuator is kept open when de-energized due to the first open function (filling). This enables heating operation during the carcass construction phase even when the electric wiring is not yet complete. During the later electrical start up, the first open function is unlocked by applying the operating voltage for more than 6 minutes. The actuator will then be completely operable. The valve is opened once by 0.5 mm and then closed again after applying the operating voltage of 24 V AC. For this, the first open function is unlocked and the valve closing point is detected. This ensures an optimum match with valve.

Connection of the actuator

The actuator can be protected against unauthorized access simply by removing the visor

5.6 Actuators

5.6

BALLOREX® Dynamic

ON/OFF actuator 230 V or 24 V operating voltage

The mechanism of the actuator uses a PTC resistor-heated elastic element and a compression spring. The wax element is heated by applying the operating voltage and moves the integrated piston. The force generated by the movement is transferred on the piston lifter and thus opens and closes the valve.

Operating voltage 230 V AC, 50/60 Hz 24 V AC/DC 0/60 Hz

Base position Normally closed Normally closed

Operating power 1,8 W 1,8 W

Closing and opening times approx. 3 min. approx. 3 min.

Actuating force 100 N+/-5% 100 N+/-5%

Ambient temperature 0 to +60°C 0 to +60°C

Protection Class IP 54 IP 54

CE conformity EN 60730 EN 60730

Connecting cable Grey/1 m Grey/1 m

The valve is opened steadily by the ram motion upon switching on the operating voltage and after expiry of the dead time. The wax element cools down after the operating voltage is cut and after expiry of the hold time, the valve is closed evenly by the closing force of the compression spring.

In its delivery condition, the actuator is kept open when de-energised due to the first open function (filling). This enables heating operation during the carcass construction phase even when the electric wiring is not yet complete. During the later electrical start up, the first open function is unlocked by applying the operating voltage for more than 6 minutes. The actuator will then be completely operable.

5.6 Actuators

5.6

BALLOREX® Dynamic

Connection of the actuator

5.6 Actuators

5.6

230 V AC / 24 V DC

BALLOREX® Dynamic

Make sure the dimension of the balancing valve, corresponds with the design flow.Arrow on BALLOREX Dynamic housing indicates flow direction to be respected.

BALLOREX valve can be orientated 3600 around pipe axis.

No upstream or downstream pipe lengths required. Bends can be mounted directly onto the valve.

Ensure no jointing medium is protruding into the valve/pipe joint. Remember to deburr pipe ends.

Flush the system.

5.7 Installation procedure

5.7

BALLOREX® Dynamic5.7 Installation procedure

5.7

Remove blind cap.

Note! Blind cap also serves as pre-setting tool.

Insert cartridge which has a flow range corresponding to design flow.

Note!Steering pin must slide into the groove.

Tighten cartridge carefully with 37 mm key.

Connect flow meter, and select valve type / Venturi Kv.Turn the preset tool until required flow is displayed.

When using the BALLOREX Dynamic as control valve, an actuator must be mounted

The connection ring is screwed on to the valve, and the BROEN actuator easily clicked on to it

BALLOREX® Dynamic

When adding glycol to the water the density of the media changes, which also affects the measuring of differential pressure on all types of balancing valves.

For exact measurements the equivalent flow to be calculated into the flow-equation:

Q = Kv √

Kv = Kv-value of Venturi orifice [m3/(h bar)]ρ = Media density [kg/m3] Q = Flow [ m3/h ]ΔP = Differential pressure signal across Venturi orifice [bar]

To compensate for a given glycol content the equivalent flow to be measured is calculated. For this purpose the density of the water/glycol mixture at a given temperature is required.

Example A cooling system with a media temperature of -2ºC has a content of 30% ethylene glycol. In the table on the next page the graph for 30% crosses -2ºC on the x-axis where the density of 1052 kg/m3 is read on the y-axis.

Find the media temperature on the x-axis (example -2 ºC). Find the intersection with the media’s glycol concentration (example 30%). Read the density vertically on the y-axis (example 1052 kg/m3)

A valve has a design flow of 0,854 m3/h, a Kv-value of 1,56 and measures ΔP of 0,3 bar.

Inserted in the flow equation, the equivalent flow, to be measured on the valve to compensate for glycol density, is calculated:

Qequivalent = 1,56 √ = 0,832 m3/h

5.8 Correction for glycolic mixtures

ΔP x ρwater 20ºC

ρwater/glycol mixture

0,3 x 998

1052

5.8

BALLOREX® Dynamic

Density correction for ethylene glycol* water mixtures

Densitiy correction for propylene glycol* water mixtures

* The densities are average values for ethylene- and propylene glycols used by ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers)


5.8

-20 -10 0 10 20 30 40 50 60 70 80 90 100960

970

980

990

1000

1010

1020

1030

1040

1050

1060

1070

1080

1090

0%

10% Glycol

20% Glycol

30% Glycol

40% Glycol

50% Glycol

Media density [kg/m3]

Media temperature [oC]

-2º C

1052 kg/m3

-20 -10 0 10 20 30 40 50 60 70 80 90 100960

970

980

990

1000

1010

1020

1030

1040

1050

1060

0%

10% Glycol

20% Glycol

30% Glycol

40% Glycol50% Glycol

Media density [kg/m3]

Media temperature [o C]

BALLOREX® Dynamic

Flow correction factors

In the diagram on the following pages, the various densities have been converted into correction factors, that can be multiplied directly by the design flow rate.

ExampleA cooling system with a media temperature of -2ºC has a content of 30% ethylene glycol. In the table on the next page the graph for 30% crosses -2ºC on the x-axis where the density correction factor indicates 0,974 on the y-axis. The valve has a design flow rate of 0,854 m3/h, and the equivalent flow to be measured

Qequivalent) is: 0,854 m3/h x 0,974 = 0,832 m3/h


5.8

BALLOREX® Dynamic

5.8

Flow correction factors for ethylene glycol* water mixtures

Flow correction factors for propylene glycol* water mixtures

*The densities are average values for ethylene- and propylene glycols used by ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers)


-20 -10 0 10 20 30 40 50 60 70 80 90 1000,945

0,95

0,955

0,96

0,965

0,97

0,975

0,98

0,985

0,99

0,995

1

1,005

1,01

1,015

1,02

1,025

1,03

1,035

0% Glycol

10% Glycol

20% Glycol

30% Glycol

40% Glycol

50% Glycol

60% Glycol

Flow correction factor

Media temperature oC

-20 -10 0 10 20 30 40 50 60 70 80 90 1000,965

0,97

0,975

0,98

0,985

0,99

0,995

1

1,005

1,01

1,015

1,020% Glycol

10% Glycol

20% Glycol

30% Glycol40% Glycol50% Glycol60% Glycol

Flow correction factor

Media temperature oC

-2º C

0,974

ballorex® dynamic - bouwproducten.nl a flow meter the venturi’s kv-value is entered once, ... it...

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