Automatic Air Release Valve Description The S-050 series Automatic Air Release Valve releases accumulated air from the system while it is under pressure. The presence of air in a water system can reduce the effective cross sectional flow area resulting in increased head loss and decreased flow. Unwanted air may also cause water hammer and metering inaccuracies, while hastening corrosion. In spite of its compact and light weight structure, the S-050 series Automatic Air Release Valve has a 12mm2 orifice that enables it to release air at high flow rates and is not exposed to obstruction by debris. Applications - On most types of pumps. - After filters, pressure reducers and fertilizer injection systems. Operation The automatic air release valve releases entrapped air from pressurized systems. Without air valves, pockets of accumulated and entrained air may cause the following hydraulic disturbances: - Restriction of effective flow due to a throttling effect as would a partially closed valve. In extreme cases this will cause complete flow stoppage. - Obstruction of efficient hydraulic transmission due to air flow disturbances. - Accelerate cavitation damages. - Pressure transients and surges. - Corrosion in pipes, fittings and accessories. - Danger of high-energy bursts of compressed air. - Inaccuracies in flow metering. The valve functions while the system is under pressure, according to the following stages: 1. Entrapped air, which accumulates at peaks and along the system, rises to the top of the valve, which in turn displaces the liquid in the valve’s body. 2. The float descends, unsealing the rolling seal. The automatic air release orifice opens and the accumulated air is released. 3. Liquid enters the valve and the float rises, pushing the rolling seal back to its sealing position. Note: Automatic air release valves are designed to release air as it accumulates at peaks in pressurized systems. They are not normally recommended for vacuum protection or for discharging large volumes of air, because of their inherently small orifices. For this purpose, air & vacuum valves are recommended as they have much larger orifices. However, automatic air release valves will permit air to enter the system under vacuum conditions. If this is not desirable, specify the one-way out check valve. Main Features - Working pressure range: SG-10 0.1 - 10 bar S-050 0.2 - 16 bar - Test pressure for the air valve is 1.5 times its working pressure. - Maximum working temperature: 60° C. - Maximum intermittent temperature: 90° C. - The body is made of high strength composite materials and all operating parts are made of specially selected corrosion- resistant materials. - The larger than usual orifice enables it to release air at higher flow rates than other automatic air release valves of its kind. - The large orifice with its self-cleaning mechanism dramatically reduces obstruction due to debris. - The valve’s rolling seal mechanism design is less sensitive to different pressures than a direct float seal, thus enabling a one size orifice for a wide pressure range (from 0.2 up to 10/16 bar). - Light weight, simple and reliable structure. - A drainage outlet enables removal of excess fluids. Valve Selection - Available in male threaded sizes: 1/2”, 3/4”, 1” - BSP / NPT - One-way out check valve - available as a valve that will only release air from the system and will not admit air to the system when negative pressure conditions occur. This characteristic is obtained by adding a check valve to the air outlet. Upon ordering, please specify: model, size, working pressure, threads standard and type of liquid.

SG-10 S-050 PARTS LIST AND SPECIFICATION No. Part Material 2. Air Release Outlet Reinforced Nylon Polypropylene BUNA-N EPDM Reinforced Nylon Foamed Polypropylene BUNA-N Reinforced Nylon / Brass Nylon AUTOMATIC AIR RELEASE FLOW RATE Differential Pressure [Bar] A.R.I. FLOW CONTROL ACCESSORIES Ltd. www.arivalves.com [email protected] Tel: 972-4-6761988 A.R.I. FLOW CONTROL ACCESSORIES Ltd. reserves the right to make product changes without prior notice. To insure receiving updated information on parts specifications, please call the export dept. at the A.R.I. factory. A.R.I. FLOW CONTROL ACCESSORIES...