IFS NUVENT SERIES IWF FOR POTABLE WATER ANTI SLAM AIR RELEASE AND VACUUM BREAK AIR VALVES
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1 IFS NUVENT SERIES IWF FOR POTABLE WATER ANTI SLAM AIR RELEASE AND VACUUM BREAK AIR VALVES
2 CONTENTS 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 DN5 Dimensions, weights materials and details IWF DN8 to DN2 Dimensions, weights materials and details Variations and outlet connections Nuvent test procedures
3 INFINITE FLOW SOLUTIONS 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 2 years. Supplying and servicing the needs of international clients in over 1 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. IFS - THE POWER OF CONTROL 1 NUVENT
4 HIGH VOLUME AIR DISCHARGE During filling of the pipeline, air passes through the air valve at the same flow rate as water in the pipeline, the floats remain in the open position allowing air to pass freely through the valve. When water enters the valve the floats are buoyed and the valve closes. ANTI SLAM FLOAT SMALL ORIFICE (NOZZLE) FLOAT CONTROL FLOAT HIGH VOLUME AIR DISCHARGE CAPACITY 8 NUVENT HIGH VOLUME AIR DISCHARGE CURVES FROM DN25 TO DN1 7 NUVENT HIGH VOLUME AIR DISCHARGE CURVES FROM DN15 TO DN mm 5 mm 8 mm 1 mm mm 2 mm 25 mm 3 mm 3 2 IFS
5 ANTI SLAM AIR DISCHARGE During rapid filling, pump trip, rapid valve closure and 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 air can 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 FLOAT SMALL ORIFICE (NOZZLE) FLOAT CONTROL FLOAT ANTI SLAM AIR DISCHARGE CAPACITY ANTI SLAM SWITCHINGPOINTS &INPUT DATA FOR SURGE PROGRAMS 25mm IWF 5mm IWF 8mm IWF 1mm IWF 15mm IWF 2mm IWF Anti Shock Orifice Size (mm) Inlet Size (mm) Outlet Size (mm) SwitchingPressure (kpa) SwitchingVelocity (m/s) SwitchingFlow (l/s) NUVENT ANTI SLAM DISCHARGE CURVES FROM DN25 TO DN1 12 NUVENT ANTI SLAM DISCHARGE CURVES FROM DN15 TO DN mm 5 mm 8 mm 1 mm mm 2 mm 25 mm 3 mm 3 NUVENT
6 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. NOZZLE (SMALL ORIFICE) NOZZLE SEAT CONTROL FLOAT SMALL ORIFICE AIR DISCHARGE CAPACITY AND SIZES NUVENT SMALL ORIFICE DISCHARGE CURVES SMALL ORIFICE SIZES Valve Series Small Orifice Size 25 IWF IWF IWF IWF IWF IWF mm 1.5 mm 2.4 mm 3mm 4 mm 4 IFS
7 VACUUM BREAK During the draining, pump stoppage or pump trip, the floats will gravitate towards the baffle plate. Air will travel through the large orifice, past the floats and through the intake orifice into the pipeline. ANTI SLAM FLOAT SMALL ORIFICE (NOZZLE) FLOAT CONTROL FLOAT BAFFLE PLATE VACUUM BREAK CAPACITY NUVENT INFLOW CURVES FROM DN25 TO DN1 NUVENT INFLOW CURVES FROM DN15 TO DN mm 5 mm 8 mm 1 mm mm 2 mm 25 mm 3 mm NUVENT 5
8 DN25 & DN5 SERIES IWF Nuts SS 34/316 Top Cover SS 34/316 or Mild Steel Screen Mesh SS 34/316 Top Flange SS 34/316 or Mild Steel O-ring NBR Anti Slam Float HDPE Nozzle Float HDPE Nozzle SS 316 Nozzle Seat EPDM Barrel SS 34/316 Control Float HDPE Tie Rods SS 34/316 Cheesehead Screw SS 316 Baffle Plate SS 316 Baffle Spacer Nylon/SS 316 O-Ring NBR Lower Flange SS 34/316 or Mild Steel Nipple SS 34/316 or Mild Steel Double-Acting with Anti Slam orifice (triple-acting/three stage) End Connection Screwed BSP/NPT Operating Pressure.5-25 bar / PSI Operating Temperatures.5-4 bar / PSI - 8º C / º F.5-64 bar / PSI.5-1 bar / PSI S ize Model no. Pressure Rating Overall Height Overall Diameter Weight 25mm / 1" 5mm / 2" 25 IWF 25 5 IWF Bar / 363 PSI 25 Bar / 363 PSI 252mm / 9.92" 31mm /11.85" 1mm / 4" 13mm / 5.12" 3.9 Kg /9 LB 6.9Kg / 15 LB 25 IWF 4 5 IWF 4 4 Bar / 58 PSI 4 Bar / 58 PSI 32mm / 11.88" 351mm / 13.81" 1mm / 4" 13mm / 5.12" 4.9Kg / 1.8 LB 8.4Kg / LB 6
9 DN8 to DN2 SERIES IWF Nuts SS 34/316 Top Cover SS 34/316 or Mild Steel Screen Mesh SS 34/316 Top Flange SS 34/316 or Mild Steel O-ring NBR Anti Slam Float HDPE Barrel SS 34/316 Tie Rods SS 34/316 Nozzle Float HDPE Nozzle SS 316 Nozzle Seat EPDM Control Float HDPE Cheesehead Screw SS 316 Baffle Plate SS 316 Baffle Spacer Nylon/SS bar / PSI.5-25 bar / PSI.5-4 bar / PSI.5-64 bar / PSI.5-1 bar / PSI End Connection Flanged studded Larger sizes are available on request up to 45NB / 18. Double-Acting with Anti Slam orifice (triple-acting/three stage) O-Ring NBR Lower Flange SS 34/316 or Mild Steel Studs SS 34/316 Operating Temperatures - 8º C / º F Size Model no. Pressure Rating Overall Height Overall Diameter Weight 8mm / 3" 8 IWF Bar / 232 PSI 284mm / 11.2" 2mm / 8" 16 kg / 35 LB 8 IWF Bar / 363 PSI 284mm / 11.2" 2mm / 8" 16 kg / 35 LB 8 IWF 4 4 Bar / 58 PSI 317mm / 12.5" 2mm / 8" 22.5 kg / 49 LB 1mm / 4" 1 IWF Bar / 232 PSI 284mm / 11.2" 235mm / 9.25" 22 kg / 48 LB 1 IWF Bar / 363 PSI 284mm / 11.2" 235mm / 9.25" 22 kg / 48 LB 1 IWF 4 4 Bar / 58 PSI 318mm / 12.5" 235mm / 9.25" 27 kg / 6 LB 15mm / 6" 15 IWF Bar / 232 PSI 464mm / 18.27" 285mm / 11.22" 5 kg / 12 LB 15 IWF Bar / 363 PSI 464mm / 18.27" 285mm / 11.22" 5 kg / 12 LB 15 IWF 4 4 Bar / 58 PSI 464mm / 18.27" 285mm / 11.22" 5 kg / 12 LB 2mm / 8" 2 IWF Bar / 232 PSI 53mm / 19.8" 34mm / 13.4" 6 kg / 147 LB 2 IWF Bar / 363 PSI 53mm / 19.8" 34mm / 13.4" 6 kg / 147 LB 2 IWF 4 4 Bar / 58 PSI 53mm / 19.8" 34mm / 13.4" 6 kg / 147 LB 25 mm / 1" 25 IWF Bar / 232 PSI 573 mm / 22.5" 425 mm / 16.7" 11 kg / 243 LB 25 IWF Bar / 363 PSI 573 mm / 22.5" 425 mm / 16.7" 11 kg / 243 LB 3 mm/ 12" 3 IWF Bar / 232 PSI 625 mm / 24.6" 53 mm /2.9" 16 kg / 353 LB 3 IWF Bar / 363 PSI 625 mm / 24.6" 53 mm /2.9" 16 kg / 353 LB 7 NUVENT
10 OUTLET CONNECTIONS Smart Valve Telemetry Housing Contains a compact integral data logging and communication feature. Screwed Outlet The valve outlet is tapped to either BSP or NPT to allow connection to piping off systems. Screwed T Outlet The valve outlet is tapped to either BSP or NPT to allow connection to piping off systems, this type of connection can be used with controlled air release configuration. Gooseneck Outlet The valve outlet is fitted with a gooseneck. This is often requested in desert applications. Swivel Outlets Can be supplied in two formats T outlet and straight outlet to connect to desired flanged piping. 8
11 NUVENT TEST PROCEDURES 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 Low Head Leak Test The valve is attached to the test rig, water from an elevated tank flows under gravity into the valve buoying the floats, the floats seal once a pressure of.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 1th 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. NUVENT 9
12 IFS South Africa Tel Web: ref iwf2 Copyright 217 Infinite Flow Solutions All Rights Reserved.
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