The flow rate is set using the flow-measurement devices. The valve has a setting scale that provides direct reading of the adjusted flow rate at the sight glass.

Flow measurement is based on the principle of a baffle float with return spring, where the reading is on the bottom line of the float. The measuring device is placed in a bypass, isolated from the system flow. Through demand, the bypass is opened and closed through pressing and releasing the valve handle. An advantage of the device is that reading the flow has no influence on the main flow rate, eliminating the need for an additional shut-off device.

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