Check valves – Applications
The use of check valves, or other suitable safety devices, is prescribed by
standards and technical rules and regulations in many countries to prevent
contamination of the drinking water. NEOPERL® check valves are used all
over the world in their capacity as backflow safeguards that comply with the
pertinent standards. The broad spectrum of check valves has also proven
itself in many other fields of application.
– to prevent contamination of drinking water as a result of backflow,
backpressure or backsiphonage
Example: a pull-out kitchen spray or shower head
– to prevent possible damage or contamination of sensitive equipment
caused by backflow
Example: water meters, pumps or filters
– to hold water in a system or pipe to prevent it from running dry
or to facilitate a restart
Example: pump systems
– to prevent crossover flow between systems with different line pressures
Example: cold and hot water supplies in thermostatic mixers
– to minimise the risk of backflow or leakage in the event of a valve failure
Example: a solenoid valve on the upstream side of an application
– to safeguard correct functioning in complex systems by ensuring that
water only flows in one direction
Example: heating systems with multiple heating zones, booster pumps
– to prevent malfunctions caused by system pressure fluctuations in
pressure-sensitive installations (unwanted discharge of water)
Example: a backflow preventer with aerated intermediate pressure
chamber
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