Non-Return Solenoid Valve Pack – OP00003
The Non-Return Solenoid Valve Pack is designed for installations where the application or process equipment is positioned above the chiller.
When a cooling system is switched off, fluid contained within elevated pipework can flow back towards the chiller under gravity. Depending on the installation, this additional fluid returning to the chiller could cause the internal tank to overflow.
The Non-Return Solenoid Valve Pack helps to prevent this backflow and provides additional protection for installations where the chiller and application are positioned at different heights.
How Does it Work?
The pack adds two valves to the chiller’s process fluid circuit, a sprung non-return valve on the process outlet, and a solenoid valve on the process inlet.
During normal operation, these allow process fluid to circulate between the chiller and application. When the chiller is powered off, the inlet solenoid valve closes, while the non-return valve prevents fluid from flowing backwards through the outlet.
Together, these help to prevent fluid within elevated pipework from draining back into the chiller.
Both valves are fitted internally within the chiller as part of the factory-fitted Option Pack.
When Should I Consider a Non-Return Solenoid Valve Pack?
The pack should be considered where the application, process equipment, or associated pipework is positioned above the chiller and there is a risk of fluid draining back towards the chiller when the system is switched off.
The overall installation, pipework arrangement, and relative height of the chiller and application should therefore be considered when specifying the cooling system.
If you are unsure whether your installation requires non-return valves, speak to the ATC team about your application and pipework arrangement.
