Back pressure valves are direct acting damped maximum pressure in-line valves fitted with bypass non-return valves. They are obtainable within the adjustable range 2 ÷ 250 bar.
Adjustment is by means of a grub screw or a plastic knob, on ports A or B (single), or on AB double.
The cartridge is direct acting type CMP.20.
These valves are especially used on vertical working cylinders with dragging loads.