Why is the permitted operating pressure reduced in DC voltage solenoid valves?

In a DC solenoid, the current intake depends only on the resistance (ohmic resistance) of the coil. The current increases relatively slowly after activation to the consistent holding current. Anchor forces in DC solenoids are less than those of AC solenoids with the same coil size (number of windings and wire diameter), meaning that they can only switch lower media pressures than AC solenoids at the same diameter. However, DC solenoids are useful as valve actuators, since a series of control devices (such as a PLC) outputs DC signals directly to the controller for use. Another application are battery-operated valves, which can use when there is no mains power supply or a very complicated mains network supply, or with specialised power supply units.