Emergency supply to key customer

Situation: An industry customer with separate water supply needs an emergency supply from the public water supply network

To establish such an emergency supply, the two networks (A and B) were connected.

To separate the flow between the two networks (A and B), the original idea was to install a gate valve with electrical actuator but with no electricity available at the point of installation, this was not possible.

Solution: Installation of a customised control valve

Instead, a customised control valve was installed. Due to higher everyday pressure on the outlet of the control valve (B), the control valve is supplied with a built-in check valve to prevent back flow.

By default, the control valve is closed. The valve senses pressure on the outlet side (B), and if pressure drops, due to failure at the industry customer’s water supply, the valve will open and allow flow from the public water supply network (A) to the industry customer (B).

When the industry customer’s water supply pressure is reestablished, the valve will close and once again separate the two networks (A and B). This backup function ensures water inflow to the industry customer despite a failure or breakdown at their water supply.