A self-acting pressure reducer is used primarily for district heating systems.
The controller closes on rising pressure.
The controller is for use in a flow mounting.
The actuator shall have one control diaphragm and a squeezing spring for a differential pressure setting.
The setting spring should be outside the medium.
The setting sprint should be colored to clearly differentiate settings ranges in applications.
The pressure actuator shall use a roll diaphragm.

The pressure actuator shall be opened ***to an atmospheric pressure.

Не совсем понимаю смысл.

Спасибо.