CHM3 CHM3 is a non -hydropolitan return valve is a no -return valve with hydraulic piloting designed to ensure the unidirectional flow in industrial applications. This modular valve with laying plan in accordance with ISO 4401-03 standards is ideal for compact and easy to integrate montages in complex systems. It must always be mounted under the directional valve. The design with spring closure and with a cone on the corner allows an airtight and lasting closure. CHM3 valves functionality: perfect for industrial applications, this CHM3 valve is the ideal choice to ensure flow control, preventing the return of the fluid and protecting the system from unwanted return flows.