To achieve the more uniform distribution of a liquid to a spray bar and to hold the pressure in a pipeline in the pressure of a liquid supply or less when the spray bar or a printing press is stopped.

The dampening arrangement 1 of a printing press 12 having a spray bar 16 and a supply source 18 of a liquid L has the pressure regulating device 22 connected to the supply source 18 through a first conduit 20 and connected to the spray bar 16 through a second conduit 24. The arrangement 10 is equipped with an accumulator 26 having a chamber 28 separated into first and second demarcated chambers 32, 34 and the first demarcated chamber 32 is hermetically closed to be filled with inert gas and the second demarcated chamber 34 is connected to the second conduit 24. The arrangement 10 is equipped with the third conduit 38 connected to the second conduit 24 and the liquid supply source 18 and having a flow rate limiting orifice 40 limiting the flow rate of the liquid L between the second conduit 24 and the liquid supply source 18.