How It Functions and Application
A minimum flow valve which is an automatic recirculation valve offers protection automatically during low load operation. When the pump load drops below the minimum flow, the valve disc starts moving to the seat causing a bypass bush opening to create a bypass flow path which in turn makes it possible for the minimum flow load to be reached and maintained. This valve is used protectively in pumps handling hot boiler waters. It is also used in situations where there is partial evaporation of water content that can cause the pump to run dry. The valve makes sure that the minimum flow is still maintained even when such boilers are completely shut.
Another application of this valve is in the protection of high performance pumps in the startup phase. In such a case, several pumps are parallel in use with one pump in standby. This recirculation valve allows a smooth swap from one pump to another without causing any damage to any of the pumps. They are used in chemical and refining industries, maritime, paper and pulp industries and also in power industries to offer this kind of pump protection.
Choosing an ARC valve
There are a variety of recirculation valves in the market just like there are different pump brands. It makes it important to ensure that you get the best from the start to offer you the kind of functionality you wish to enjoy. Some of the things that you can consider when buying or choosing among the valves include the design which can determine the smooth functioning of the valve, the bypass and check features combination, protection level offers, external actuation requirements and availability of high pressure variants. They are some of the things that can help you in settling for a valve that will effectively serve your needs.
The automatic recirculation valve comes in different sizes from brand to brand. Depending on the application process, you should be in a position to choose the best. You will find anything from 1 inch up to 24 inches of valve sizes. You can even have larger sizes especially made for you to offer you the effectiveness that you are looking for.