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Air Release Valves

Air release valves are required on all positive pressure systems to allow the air in the pipework to escape thus preventing damage to pumps, pipes and fittings.   Vacuum breakers are required to allow air to enter the pipework when necessary to prevent pipe collapse.

	25mm Vacuum Breaker Valve - ARI AV-010-25 ARI vacuum breakers allow air to enter the pipework as soon as the pressure inside the pipework is less than zero kPa.   It may also allow trapped air to escape from the pipework under positive pressure however, as soon as the water in the system hits the underside of the valve, the valve will close.   In situations where you need the entrapped air to be released while the system has a positive pressure, use an ARI "Segev" or "Barak" automatic air release valve.   Max 10 Bar. Admits air into the pipelines at high flow rates during its drainage. Dynamic design allows high velocity air discharge, up to 0.7 bar differential pressure; Preventing premature closing. Specially suitable for agricultural and landscape irrigation laterals. Drip-tight sealing at low pressure. All parts are UV-protected. Lightweight, small dimensions, simple and reliable structure. The body is made of high strength plastic, and all operating parts are made of specially selected corrosion resistant materials. Working pressure range: 0.2-10 bar (3-150 psi).		Price:	QTY:

	50mm Vacuum Breaker Valve - ARI AV-010-50 ARI vacuum breakers allow air to enter the pipework as soon as the pressure inside the pipework is less than zero kPa.   It may also allow trapped air to escape from the pipework under positive pressure however, as soon as the water in the system hits the underside of the valve, the valve will close.   In situations where you need the entrapped air to be released while the system has a positive pressure, use an ARI "Segev" or "Barak" automatic air release valve.   Max 10 Bar. Admits air into the pipelines at high flow rates during its drainage. Dynamic design allows high velocity air discharge, up to 0.7 bar differential pressure; Preventing premature closing. Specially suitable for agricultural and landscape irrigation laterals. Drip-tight sealing at low pressure. All parts are UV-protected. Lightweight, small dimensions, simple and reliable structure. The body is made of high strength plastic, and all operating parts are made of specially selected corrosion resistant materials. Working pressure range: 0.2-10 bar (3-150 psi).		Price:	QTY:

	25mm ARI Automatic Air Release Valve "Segev" S-050-025 - Rated to 16 Bar This ARI 25mm automatic air release valve is often used on filters, valves manifolds and main lines to release air under pressure and, allow air into the pipework on shutdown.   Don't forget to install a 1" ball valve underneath to allow cleaning while under pressure.   Suitable for use on systems to 1,600 kPa and the valve has a sealing pressure of 20 kPa.		Price:	QTY:

	50mm Barak Automatic Air Release Valve "Barak" D-040-50 - Rated to 16 Bar This ARI "Barak" 50mm automatic air release valve is often used on filters, valves manifolds and main lines to release air under pressure and, allow air into the pipework on shutdown.   Don't forget to install a 2" ball valve underneath to allow cleaning while under pressure.   Suitable for use on systems to 1,600 kPa and the valve has a sealing pressure of 20 kPa.   For more details, click on the "information" button to the right.		Price:	QTY:

	Pink Teflon Plumbers Tape for thread sealing without leaks Our pink teflon plumbers tape is manufactured by Fedseal and is definitely a far superior product to all of those very thin white tapes.   "Teflon 002" is manufactured to a very high standard and so it is of uniform size and thickness over the complete roll.   With a thickness of 0.1mm it is up to 3 times thicker than some cheaper white versions on the market.   "Teflon 002" should be used on all Nyglass, stainless steel, brass, cast iron, aluminium, gunmetal, ductile iron, pvc and most other BSP style threads.   "Teflon 002" on our Hansen range of Nyglass fittings generally only requires 4 or 5 turns of "Teflon 002" to provide a leakproof seal.   Rolls of "Teflon 002" are 12mm wide x 0.1mm thick x 10m long and all of the tape can be used.		Price:	QTY: