Multifaceted new Air Valve combats water hammer
04/05/2020 Designed Network Solutions Ltd
To reduce water hammer, Designed Network Solutions (DNS) has launched a new Special Execution Air Valve, DNS-3F-AS-HR.Water hammer (transient pressure surges) caused by sudden changes in the velocity of the water moving through the pipeline, can now be eliminated by installing the new DNS-3F-AS-HR at the top of each riser. With its built-in anti-shock feature, this new Air Valve reduces the velocity of the approaching water column.
Transient pressure surges also occur when a riser is first primed or during maintenance - but the DNS-3F-AS-HR
benefits from exclusive, double anti-slam technology that removes unwanted surges and pulsations, offering perfect sealing in low pressure conditions.
In addition, a power outage, which sees the main riser drain - due to usage within a building, will also create water hammer. When power is restored, pumps want to fill the raiser as quickly as possible. Typically, a standard air valve at the top of the riser will let it fill two quickly, resulting in the water column slamming into the top of the riser and causing a water hammer event. However, this can all be prevented by the new DNS Air Valve, which allows the release of air pockets in a building to prevent collapses in the water or fire-main system on pump start-up.
During normal system operation, air produced by the pipeline that accumulates at the top of the riser will be discharged by the DNS Air Valve whilst under pressure. This will prevent any air entrapment that can corrode metallic pipes.
For more information, please contact:
Craig Stanners
Designed Network Solutions Ltd
15 Buckingham Drive
Northwich
CW9 8WB
Tel: 07375 385 089
Email: craig@dns-uk-ltd.co.uk
Web: dns-uk-ltd.co.uk/
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