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gn: Hvt:NT~u,~AT RBXc PERFORMANCE The Vent-O-Mat series RBXc Valve has four functions, namely:

I . Large volume air intake - vacuum conditions: The large orifice of the air valve is equal to the nominal diameter of the valve ensuring no restrictions during air intake.

2. Large volume air discharge - normal filling conditions: The air valve will discharge large volumes of air under normal filling conditions.

3. Surge Protection - excessive filling conditions, re-joining columns subsequent to pump trip: The valve has an integral surge alleviating device that will automatically react once a predetermined velocity has been exceeded to protect the pipeline from the damages of surge as a result of the re-joining liquid columns, using the pipeline as an accumulator.

4. Pressurized air discharge: The valve will automatically release pressurized air once the pipeline is hydraulically full.

We have provided below, the performance capabilities of a typical DN25, DN50, DN80, DN100, DN150, DN200, DN250 & DN300 RBXc valve:

INTAKE CAPACITIES OF DN25, DN50, DN80, DN100, DN150, DN200, DN250 & DN300

50 RBXc 80 RBXc 100 RBXc 150 RBXc 200 RBXc 250 RBXc 300 RBXc

Bar MA 3/m MA 3/m MA 3/m MA 3/m MA 3/m MA 3/m MA 3/m

0 0 0 0 0 0 0 0

0.03 4.10 8.76 12.57 25.77 36.78 57.47 82.76

0.05 5.26 11.57 18.05 35.79 54.64 85.38 122.95

0.1 7.93 17.72 26.24 57.09 83.29 '. 130.14 187.40 , , 0.15 9.93 22.36 33.62 71.13 105.82 \. 165.34 238.09

0.2 11.56 25.48 38.58 84.56 124.72 194.87 280.62

0.25 12.71 28.09 42 .98 94.83 138.09 215.76 310.69

0.3 13.80 30.42 46.65 101.70 152.42 238.15 342.94

0.35 14.66 32.29 49.75 111.59 157.90 246.72 355.28

0.4 15.26 33.89 51.55 117.86 169.55 264.93 381.50

0.45 15.81 34.98 53.40 122.89 183.23 286.29 412.26

0.5 16.15 35.66 55.54 127.66 192.21 300.32 432.47

0.55 16.39 36.37 56.93 133.74 202.57 316.52 455.79

0.6 16.62 36.75 57.08 136.57 218.11 340.80 490.75

0.65 16.61 36.79 57.19 137.44 227.29 355.15 511.41

0.7 16.61 37.19 57.52 138.05 228.25 356.65 513.57

0.75 16.67 36.75 57.81 138.62 229.22 358.15 515.73

0.8 16.65 37.13 57.79 139.21 230.18 359.65 517.90

0.85 16.84 37.39 57.87 139.85 231.10 361.09 519.97

0.9 16.91 37.39 57.87 140.06 231.10 361.09 519.97

m3/m = metres cubed per minute @ 25 degrees Celsius and 1,01325 bar absolute

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Note: Choked orifice conditions: As these figures are based on physi I te .S iglX. "~ .

conducted in reverse i.e. the vessel is dropped to pressures exceeding -0.9 bar differential pressure and air is drawn in through the valve choked conditions are seen at the higher pressures recorded the exact choking point of the valves is not as obvious as theory claims it should be. Figures reported at 0.9 bar are maximum flows at choking point of the valve. As per tests conducted by EDA UoM Michigan USA 2013

DISCHARGE CAPACITIES OF DN25, DN50, DN80, DN100, DN150, DN200, DN250 & DN300 VENT-O-MAT AIR VALVES

Note: The discharge function of the Vent-O-Mat valve is in two phases namely:

1. DISCHARGING THROUGH THE LARGE ORIFICE - SUBCRITICAL CONDITIONS: 050 RBXc 080 RBXc 100 RBXc 150 RBXc 200 RBXc 250 RBXc 300 RBXc

Bar M'3/m M'3/m M'3/m M'3/m M'3/m M'3/m M'3/m

0 0 0 0 0 0 0 0

0.01 2.111765 3.895467 6.086667 13.99714 24.88381 38.88095 55.98857

0.02 2.953151 5.4912 8.58 20.7 36.8 57.5 82.8

0.03 3.585714 6.6736 10.4275 25.956 46.144 72.1 103.824

0.0355 3.9 7.228163 11.294 28.5792 50.80747 79.38667 114.3168

0.04 7.681896 12.00296 30.72545 54.62303 85.34848 122.9018

0.05 8.558454 13.37258 35.08 62.36444 97.44444 140.32

0.06 9.383314 14.66143 39.18 69.65333 108.8333 156.72

0.0711 10.176 15.9

Flows in red indicate the point at which the valve switches into "Anti-Shock" mode

m3/m = metres cubed per minute @ 20 degrees Celsius and 1.01325 bar absolute

Should the filling rate be excessive or if pump trip conditions are experienced and the columns commence to re-join very rapidly, then the air valve will automatically switch to the "Anti-Shock" mode, using the entrapped air to build up back pressure which will in turn slow down the liquid column. The energy of the potential surge is continuously absorbed and dissipated through the "Anti-Shock" orifice. This orifice will continuously discharge air, as long as there is air trapped in the system. The discharge capabilities of the "Anti-Shock" orifice are given up to 10 bar "'p, as tested by the Council of Scientific and Industrial Research - South Africa Aero Test 94/140.

2. DISCHARGING THROUGH THE "ANTI-SHOCK" ORIFICE

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50 RBXc 80 RBXc 100RBXc 150 RBXc 200 RBXc 250 RB Xc 300 RBXc

Bar M'3/m M'3/m M'3/m M'3/m M'3/m M'3/m M'3/m

1 0.72 1.80 1.01 1.80 3.32 5.07 7.18

2 1.45 3.60 2.02 4.84 8.96 13.67 19.38

3 2.17 5.40 3.85 8.49 15.71 23.98 33.98

4 2.85 7.20 7.28 12.13 22.44 34.24 48.53

5 3.52 9.02 12.68 15.77 29.17 44.51 63.08

6 4.19 10.92 16.10 26.31 48.67 74.27 105.26

7 4 .88 12.81 18.89 34.50 63.81 97.37 137.99

8 5.51 14.69 21.66 42.43 78.49 119.76 169.73

9 6.15 16.60 24.48 50.10 92.66 141.40 200.40

10 6.78 18.50 27.28 57.69 106.71 162.83 230.77

m3/m = metres cubed per minute @ 20degrees Celsius and 1.01325 bar absolute

"Anti-Shock" Orifice Diameters

Valve Size DN "Anti-Shock" Orifice Diameters mm mm 25 4 50 9 80 14 100 17 150 25 200 34

The above is proprietary information which is the exclusive property of Aveng Manufacturing DFC and is provided in good faith for the exclusive use of our client and may not be divulged to any persons or companies without the express permission of Aveng Manufacturing DFC.

Aveng Manufacturing DFC Tel: + 27 11 7480200 DFC Water 32 Lincoln Rd D Tel: + 27117480380 P.O. Box 5064 Benoni South e-mail: katlego.malinga@dfc.co.za Benoni South 1501 web page: www.ventomat.com 1502 South Africa

Av..~Y..~~.§ South Africa

INFORMATI~I)I' ONLY Sign .. L.4L//(~ ............

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50 - 300 RBXc ANTI-SHOCK ORIFICE DISCHARGE CAPACITY

so 100

Flow Rate (m'/min)

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-- 50RBXc

--80RBXc

-- looRBXc

150 RBXc

-- 2ooRBXc

-- 2SORBXc

--3OORBXc

0.08

0.07

0.06

0.05

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0.03

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0.01

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050 - 300 RBXc LARGE ORIFICE DISCHARGE

.

J - - 050 RBXc

--OSORBXc , , --100 RBXc

i 150 RBXc

J I

-- 200RBXc

-- 2S0RBXc

--300RBXc / / --'

40 60 80 100 120 140 160 ISO

Flow Rate (m'/min)

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0.9

0.8

0.7

0.6

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0.4

0.3

0.2

0.1

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50 - 300 RBXc LARGE ORIFICE INTAKE CAPACITY

200 300 400 500

Flow Rate (m'/min)

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600

--50RBXc

--80RBXc

--100 RBXc

ISO RBXc

--200RBXc

--250 RBXc

--300RBXc