ifs iwf nuvent catalogue v009 g 16-10-2017 sm

NUVENTA N T I S L A M

A I R R E L E A S EA N D

V A C U U M B R E A KA I R V A L V E S

S E R I E S I W F F O R P O T A B L E W A T E R

IFS

About IFS

High volume air discharge Curves and operation

Anti slam air discharge Curves and operation switching points

Pressurised air release Curves and operation

Vacuum break Curves and operation

IWF DN25 and DN50 Dimensions, weightsmaterials and details

IWF DN80 to DN200 Dimensions, weightsmaterials and details

Variations and outlet connections

Nuvent test procedures

CONTENTS

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NUVENT

Combining over 43 years of valve experience, Infinite Flow Solutions is made up of individuals who have

worked with the core of South Africa’s top valve brands. These individuals have been at the forefront of air

valve and valve technology for the last 20 years. Supplying and servicing the needs of international clients in

over 100 countries worldwide, including customers in the USA, UK, Australia, Middle East, Europe and Far East.

Infinite Flow Solutions brings together the best in valve design, valve sizing, valve placement, surge

experience, valve sales and customer satisfaction.

The individuals behind Infinite Flow Solutions have not only supplied valves, but have offered advice, analysis

and problem solving to clients in thousands of applications worldwide.

Infinite Flow Solutions strives to carry forward and build on this history to offer reliable, affordable and

dependable solutions to its clients.

INFINITE FLOW SOLUTIONS

I F S - T H E P O W E R O F C O N T R O L1

HIGH VOLUME AIR DISCHARGE

HIGH VOLUME AIR DISCHARGE CAPACITY

During filling of the pipeline, air passes throughthe air valve at the same flow rate as water in the

pipeline, the floats remain in the open positionallowing air to pass freely through the valve. When

water enters the valve the floats are buoyed and thevalve closes.

3000

NUVENT HIGH VOLUME AIR DISCHARGE CURVES FROM DN150 TO DN300

00

500 1000 2000 250015000

1

2

3

4

5

6

7

150 mm 200 mm 250 mm 300 mm

Pres

sure

kPa

Flow Normal Litres per Second

NUVENT HIGH VOLUME AIR DISCHARGE CURVES FROM DN25 TO DN100

25 mm 50 mm 80 mm 100 mm

00

1

2

3

4

5

6

7

8

50 100 200 250 300150

Pres

sure

kPa


ANTI SLAM FLOAT

SMALL ORIFICE (NOZZLE) FLOAT

CONTROL FLOAT

2

IFS

ANTI SLAM AIR DISCHARGEDuring rapid filling, pump trip, rapid valve closureand other surge events. The valve will switch into

anti slam mode. Switching from the larger orifice to a smaller anti slam orifice.

The smaller orifice will restrict the rate at which aircan escape the pipeline and as a result slow the

flowrate of water through the pipeline.

Air passes around the lower float and small orifice float through the anti slam orifice to atmosphere.

ANTI SLAM AIR DISCHARGE CAPACITY

0 50 100 150 200 250 300 350 400 450 500

NUVENT ANTI SLAM DISCHARGE CURVES FROM DN25 TO DN100

1000

800

600

400

200

0

1200

25 mm 50 mm 80 mm 100 mm

Pres

sure

kPa

Flow Normal Litres per Second150 mm 200 mm 250 mm 300 mm

0 500 1000 1500 2000 2500 3000 3500 4000 4500

1000

800

600

400

200

0

1200NUVENT ANTI SLAM DISCHARGE CURVES FROM DN150 TO DN300

Pres

sure

kPa


ANTI SLAM FLOAT


CONTROL FLOAT

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NUVENT

25mmIWF

50mmIWF

80mmIWF

100mmIWF

150mmIWF

200mmIWF

Anti Shock Orifice Size (mm) 4 9 14 17 25 34Inlet Size (mm) 25 50 80 100 150 200Outlet Size (mm) 25 50 80 100 150 200Switching Pressure (kPa) 7.15 7.11 7.11 7.11 6 6Switching Velocity (m/s) 44.81 33.1 33.7 33.7 36.95 36.95Switching Flow (l/s) 22 65 169 265 653 1160

ANTI SLAM SWITCHING POINTS & INPUT DATA FOR SURGE PROGRAMS

PRESSURISED AIR RELEASE

During normal operation, while the pipeline is fully charged, disentrained air will accumulate at many

air valve locations.

When the quantity of air is sufficient to displace the control float, the float will drop away from

the small orifice (nozzle) and release the accumulated air. The control float will then buoy back into place and

seal off the small orifice.

SMALL ORIFICE AIR DISCHARGE CAPACITYAND SIZES

1.2 mm 1.5 mm 2.4 mm 3mm 4 mm

NUVENT SMALL ORIFICE DISCHARGE CURVES

0

5

10

15

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25

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45

Pres

sure

kPa

0 10 20 50 60 7030 40Flow Normal Litres per Second

NOZZLE (SMALL ORIFICE)

NOZZLE SEAT

CONTROL FLOAT

4

IFS

ValveSeries

SmallOrif ice Size

025 IWF 1.2050 IWF 1.2080 IWF 1.5100 IWF 1.5150 IWF 2.4200 IWF 2.4

SMALL ORIFICE SIZES

VACUUM BREAK

VACUUM BREAK CAPACITY

During the draining, pump stoppage or pump trip, the floats will gravitate towards the baffleplate. Air will travel through the large orifice,

past the floats and through the intake orifice intothe pipeline.

-10000 -9000 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0

NUVENT INFLOW CURVES FROM DN150 TO DN300

-5

-10

-15

-20

-25

-30

-35

150 mm 200 mm 250 mm 300 mm

Pres

sure

kPa

Flow Normal Litres per Second-1000 -900 -800 -700 -600 -500 -400 -300 -200 -100 0

NUVENT INFLOW CURVES FROM DN25 TO DN100

-5

-10

-15

-20

-25

-30

-35

25 mm 50 mm 80 mm 100 mm

Pres

sure

kPa


ANTI SLAM FLOAT


CONTROL FLOAT

5

NUVENT

BAFFLE PLATE

DN25 & DN50 SERIES IWF

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Nuts SS 304/316

Screen Mesh SS 304/316

Top Flange SS 304/316 or Mild Steel epoxy coated

O-ring NBRAnti Slam Float HDPE

Nozzle Float HDPE

Nozzle SS 316Nozzle Seat EPDM

Barrel SS 304/316

Control Float HDPE

Baffle Plate SS 316Baffle Spacer Nylon/SS 316O-Ring NBRLower Flange SS 304/316 or Mild Steel epoxy coated

Nipple SS 304/316 or Mild Steel epoxy coated

Cheesehead Screw SS 316

Double-Acting with Anti Slam orifice(triple-acting/three stage)

End Connection Screwed BSP/NPT

Operating Pressure 0.5 - 25 bar / 7.2 - 363 PSI0.5 - 40 bar / 7.2 - 580 PSI0.5 - 64 bar / 7.2 - 928 PSI0.5 - 100 bar / 7.2 - 1450 PSI

Operating Temperatures 0 - 80º C / 32 - 176º F

Top Cover SS 304/316 or Mild Steel epoxy coated

Size Model no. Pressure Rating Overall Height Overall Diameter Weight025 IWF 25 25 Bar / 363 PSI 252mm / 9.92" 100mm / 4" 3.9 Kg /9 LB025 IWF 40 40 Bar / 580 PSI 302mm / 11.88" 100mm / 4" 4.9Kg / 10.8 LB050 IWF 25 25 Bar / 363 PSI 301mm /11.85" 130mm / 5.12" 6.9Kg / 15 LB050 IWF 40 40 Bar / 580 PSI 351mm / 13.81" 130mm / 5.12" 8.4Kg / 18.51 LB

25mm / 1"

50mm / 2"

Tie Rods SS 304/316

NUVENT

DN80 to DN200 SERIES IWF

Nuts SS 304/316

Screen Mesh SS 304/316

Top Flange SS 304/316 or Mild Steel epoxy coated

O-ring NBR

Anti Slam Float HDPE

Nozzle Float HDPENozzle SS 316Nozzle Seat EPDM

Barrel SS 304/316

Control Float HDPE

Baffle Plate SS 316Baffle Spacer Nylon/SS 316

O-Ring NBRLower Flange SS 304/316 or Mild Steel epoxy coated Studs SS 304/316

Cheesehead Screw SS 316

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Double-Acting with Anti Slam orifice(triple-acting/three stage)

End Connection Flanged studded

0.5 - 16 bar / 7.2 - 232 PSI0.5 - 25 bar / 7.2 - 363 PSI0.5 - 40 bar / 7.2 - 580 PSI0.5 - 64 bar / 7.2 - 928 PSI0.5 - 100 bar / 7.2- 1450 PSI

Operating Temperatures 0 - 80º C / 32- 176º F

Larger sizes are available on request up to 450NB / 18”.

Top Cover SS 304/316 or Mild Steel epoxy coated

Size Model no. Pressure Rating Overall Height Overall Diameter Weight80mm / 3" 080 IWF 16 16 Bar / 232 PSI 284mm / 11.2" 200mm / 8" 16 kg / 35 LB

080 IWF 25 25 Bar / 363 PSI 284mm / 11.2" 200mm / 8" 16 kg / 35 LB080 IWF 40 40 Bar / 580 PSI 317mm / 12.5" 200mm / 8" 22.5 kg / 49 LB

100mm / 4" 100 IWF 16 16 Bar / 232 PSI 284mm / 11.2" 235mm / 9.25" 22 kg / 48 LB100 IWF 25 25 Bar / 363 PSI 284mm / 11.2" 235mm / 9.25" 22 kg / 48 LB100 IWF 40 40 Bar / 580 PSI 318mm / 12.5" 235mm / 9.25" 27 kg / 60 LB



250 mm / 10" 250 IWF 16 16 Bar / 232 PSI 573 mm / 22.5" 425 mm / 16.7" 110 kg / 243 LB250 IWF 25 25 Bar / 363 PSI 573 mm / 22.5" 425 mm / 16.7" 110 kg / 243 LB

300 mm/ 12" 300 IWF 16 16 Bar / 232 PSI 625 mm / 24.6" 530 mm /20.9" 160 kg / 353 LB300 IWF 25 25 Bar / 363 PSI 625 mm / 24.6" 530 mm /20.9" 160 kg / 353 LB

Tie Rods SS 304/316

OUTLET CONNECTIONS

Screwed OutletThe valve outlet is tapped

to either BSP or NPTto allow connection to

piping off systems.

Screwed T OutletThe valve outlet is tapped

to either BSP or NPTto allow connection to

piping off systems, this type of connectioncan be used with controlled air release configuration.

Gooseneck OutletThe valve outlet is fitted with a gooseneck.

This is often requested in desert applications.

Swivel OutletsCan be supplied in two formats

T outlet and straight outlet to connect to desired flanged piping.

Smart Valve Telemetry Housing

Contains a compact integraldata logging and

communication feature.

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NUVENT TEST PROCEDURES

9

NUVENT

Every Nuvent Valve is subjected to testing before departing the factory. Testing procedures are in accordance with, or exceed the procedures laid out in AWWA C-512-15.

Low Head Leak Test

The valve is attached to the test rig, water from an elevated tank flows under gravity into the valvebuoying the floats, the floats seal once a pressure of 0.5 bar is achieved. Any excess water that has

gathered during the priming of the valve is then cleared off the valve and the valve is inspected for leakages. Any sign of leakage at this point is a failure of the low head leak test.

Hydrostatic Testing Once the valve is determined to have passed the low head leak test, it remains connected to the

test rig and the pump is activated, the valve is then subjected to a pressure of 1.5 times the rated operating pressure (i.e. if the valve is rated at 25 bar it will be tested to 37.5 bar). Once this pressure is achieved, the valve will then be held at this pressure and be inspected for any leaking or weeping.

Any evidence of leakage or weeping at the said test pressure will be cause for failure.

Additional Testing Drop Testing

Drop testing is the test conducted to ensure that the valve will open and release disentrained air, when the valve is operating at the full rated pressure of the valve, (see pressurised air release page 4

for more information). Drop testing is governed by specific physical laws and is extensively tested during the development of the valve, to make sure the valve conforms to these necessary laws. Thereafter it is not necessary to test every valve or even every 10th valve in a run. Once the specific masses and orifice sizes are correct, the normal QC process of checking the components to the correct dimensions, ensures

that the valve will breathe up to the rated pressure of the valve. As a result, this test is only performed on request or as part of a third-party test that specifically states a requirement for a drop test.

The valve is placed on the test rig and pressurised to slightly above the rated pressure of the valve.Nitrogen is then introduced into the valve at a pressure higher than the rated pressure. The valve is then slowly drained of liquid, if the valve releases air before or at the rated pressure of the valve, the valve is deemed to have passed the drop test. If air is released below the rated pressure of the valve, or does

not release air at all it is deemed to have failed the test.

Failure of Testing Any valve that fails any of the above tests, is marked and later inspected for the cause of failure. The issue is rectified and the valve is retested. No valve will be allowed to leave the factory until

such time as it has successfully passed all the required testing procedures.

ifs iwf nuvent catalogue v009 g 16-10-2017 sm

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