EDT – Automatic Recirculation Control Valves 

Simple structure, low cost, long life, suitable for Low pressure Working conditions. Cast valve body, Big flow of bypass, maximum flow is 60% of the main flow, KV value an be adjusted, Bypass maximum operating pressure differential up to 4 MPa.



1” to 16”
CL 150 – 400
Cast valve body
Carbon steel or stainless steel

According to the difference of inductive main flow, the main valve disc check cone of the Automatic recirculation valve will automatically move to a certain position. At the same time the main valve disc drive bypass valve stem, transfer the movement of main valve disc to bypass, through control bypass valve disc position, change bypass throttling area, so as to control bypass flow.

When the main valve disc back into the valve seat closed, all flow backflow through the bypass. When the valve discs to rise to the top position, the bypass is fully closed, all the flow of pump flow to the processing system. This valve set four functions in one body.

elite ed series - arc valves
Flow Perception

Automatic recirculation valve main valve disc can automatically perceive the main flow of the processing system, thereby according to the flow to determine the position of the main valve disc and bypass disc.

Recirculation control

Automatic recirculation valve can inhaled pump normal operation required minimum flow into storage device through the bypass, so as to adjust pump H – Q characteristics, to realize recycling.

Bypass multistage pressure reducing

bypass control system can reduce the backflow medium from the high-pressure pump outlet to appropriate backflow to the low-pressure storage device with low noise small wear


The automatic recirculation valve also has a check valve effect, preventing the liquid backflow to pump body. Bypass non-return function is standard.


A special bypass size can be customized. The max flow rate of the bypass is subject to the max Kv value