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Table of Contents
Summary of Contents for VACUVENT VA Series
- Page 1 AIR RELEASE AND VACUUM BREAK VALVES SERIES VA OWNER’S MANUAL...
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Page 2: Table Of Contents
Independent Valve Marketing (Pty) Ltd TABLE OF CONTENTS Table of Contents ..........................2 Introduction ............................3 General Specification ........................4 General Specification ........................5 General Specification ........................6 Quality Control ..........................10 General Description ........................10 Functional Testing and Overall Inspection ................... 11 Corrosion Protection........................ -
Page 3: Introduction
This manual is intended to give guidelines for the installation, maintenance and general care required by the air valve to produce optimum results for the end user. Your Vacuvent air valve should function flawlessly for many years as it is virtually maintenance free. -
Page 4: General Specification
Independent Valve Marketing (Pty) Ltd GENERAL SPECIFICATION SCREWED – DN25 (1”), DN50 (2”) Model Weight Inch Inch Inch 025VA25 13.2 025VA40 15.7 12.3 050VA25 15.2 13.2 050VA40 18.7 16.5 Figure 1- Overall Dimensions Type: Double Orifice (Small and large orifice) with Anti-Shock Orifice Mechanism End Connection: Screwed BSP or NPT male Nominal Size... -
Page 5: General Specification
Independent Valve Marketing (Pty) Ltd GENERAL SPECIFICATION STUDDED –DN80 (3”), DN100 (4”) Model Weight Inch Inch Inch 080VA25 14.2 28.6 080VA40 16.9 34.1 100VA25 13.7 34.1 100VA40 15.7 41.4 Figure 2- Overall Dimensions Type: Double Orifice (Small and large orifice) with Anti-Shock Orifice Mechanism End Connection: Flanged for alignment to BS 4504... -
Page 6: General Specification
Independent Valve Marketing (Pty) Ltd GENERAL SPECIFICATION FLANGED –DN150 (6”), DN200 (8”) Model Weight Inch Inch Inch 150VA25 23.6 10.9 101.2 150VA40 25.1 10.9 200VA25 26.8 12.9 200VA40 12.9 Figure 3- Overall Dimensions Type: Double Orifice (Small and large orifice) with Anti-Shock Orifice Mechanism End Connection: Flanged for alignment to BS 4504... - Page 7 Independent Valve Marketing (Pty) Ltd Engineering Page 7 of 18 VSS0203WD00...
- Page 8 Independent Valve Marketing (Pty) Ltd Engineering Page 8 of 18 VSS0203WD00...
- Page 9 Independent Valve Marketing (Pty) Ltd Engineering Page 9 of 18 VSS0203WD00...
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Page 10: Quality Control
Quality control documents and material data sheets can be made available on request with purchase. The Vacuvent series VA air valve has very little that can corrode and is prepared for active duty in water delivery pipelines. GENERAL DESCRIPTION The Vacuvent - VA anti-shock series of air valves are intended to reduce the risks associated with pressure variance in pipelines. -
Page 11: Functional Testing And Overall Inspection
No damage to corrosion protection systems No visible rust CORROSION PROTECTION Vacuvent Air valves consist of stainless steel, polymer based and mild steel components; mild steel components are fusion bonded epoxy coated to prevent corrosion to a minimum thickness of 250 microns DFT. -
Page 12: Installation, Removal And Storage Instructions
Air valves should be positioned in very specific areas in order to function optimally. It is suggested that Vacuvent air valves be placed on top of an air accumulator, shown below. This accumulator should be a tee to the main pipeline; a reduction can then be added to which the air valve is mounted. -
Page 13: Installation
Independent Valve Marketing (Pty) Ltd for 3” to 8” Air Valves for design pressures from 363 Psi up to 580 Psi, for higher sizes and /or pressure ratings please consult us. Although we do not prescribe the type of valve that must be used as an Air Valve Isolating Valve we generally recommend that the valve should be allow “full bore”... -
Page 14: Storage
Independent Valve Marketing (Pty) Ltd STORAGE All Vacuvent air valves should be stored in a moderately cool area free from debris. If debris cannot be avoided, simply wrapping the air valve in plastic should be sufficient to prevent debris from entering the internal mechanisms of the air valve. -
Page 15: General Operation
GENERAL OPERATION The Vacuvent series air release valves provide a full bore solution to any pipeline. The large orifice is not restricted in vacuum and during filling operation works through the anti-shock nozzle only. Vacuvent air valves operate in reaction to the pipeline conditions and require no external input from the end user. - Page 16 Independent Valve Marketing (Pty) Ltd PIPELINE FILLING Venting of large quantities of air During pipeline filling a large amount of air needs to escape from the pipeline, during this operation shown in figure 5- the small orifice, item 1 gives way and air discharges through the anti-shock orifice, item 2, through the upper float.
- Page 17 Independent Valve Marketing (Pty) Ltd PIPELINE AT OPERATING PRESSURE Venting of large quantities of air via the anti-shock The valve will respond to large volumes of air when at operating pressure in the same manner as it does during filling – this function is fully automatic through the smart anti-shock orifice as in the previous figure.
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Page 18: Contact Details
As you can see, this one valve with its smart anti-shock will fulfil the functions of several different valves without modification or ad-ons. CONTACT DETAILS Feel free to contact us regarding your Vacuvent valve should you require any additional information. Maintenance manuals are available upon request. Tel: +27 11 918 4057/8 Fax: +27 11 894 5237 Mail: info@vacuventvalves.com...
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