Automatic Recirculation Valve

Automatic Recirculation Valve (ARV) is a multifunctional valve that primary purpose is to ensure a pre-determined minimum flow is assured through a centrifugal pump at all times. This in turn has created a need for centrifugal pumps with high heads and low specific speeds.

Special design
Gather both bypass and check features
Lowest flow defense
No outside actuation needed

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Description

Flow Sensing Capability
Low pressure loss
Operational safety, reliability, and low maintenance.
Non-return Valve: Prevent reverse flow through the centrifugal pumps via the main line and bypass line.
By-Pass Control Valve: Protecting the pump from overheating by regulating the passage of fluid through the pump during start up, shut down and when the pump is run against a closed outlet.
Pressure Reduction Nozzles: Dissipate the pressure energy and allows the line fluid to be delivered to the by-pass system efficiently, safely and quietly.
Angle patterns valve has the additional feature of not requiring removal from the pipeline during maintenance ‘Shutdowns.’
Manual bypass operations are available

Product Range

Size:	1~12” (DN25~DN300)
Rating:	150LB/ 300LB/ 600LB / 900LB / 1500LB/ 2500LB/ PN16/ PN25/ PN40/ PN64/ PN100
Body Materials:	Carbon Steel, Stainless Steel
Trim Material:	Stainless Steel
End connection:	Flange RF/ FF/ RTJ, Butt Weld

Application

A general application is to save pumps which manage warm water for boiler cooling or feeding water plants, where partial vanishing of the water content might or else cause the pump to operate dry. Even when the flow rate via the main valve to the boiler is fully shut off, a minimum flow is managed.

Another application is to save high performance pumps during a startup phase. In this situation, different pumps are used in parallel with one in standby. The pump recirculation valve permits the wrap to occur without damage to the pumps.