Unloading valve type DAM (500+)

  • Porting NG 4
  • Operating pressure: up to 700 bar
  • Flow rate: up to 40 l/min

Features

  • Adjustable over the entire pressure range
  • Zinc plated body (cartridge)
[Translate to EN:] Druckabschaltventil Typ DAM (500+)

Applications

The unloading valve DAM is a part of the 500+ series and is integrated together with a check valve into a valve block. The unloading valve is used with a low pressure (LP) and a high pressure pump (HP) in a dual-pressure-system. They both supply the same working port. The valve unloads the low pressure pump flow at a set pressure to the tank. Before the switchover both pumps supply the working port. After the switch over the low pressure pump flow is connected loss-free to the tank. The working port is supplied by the high pressure pump only.

Design

  • Seated valve
  • Directly operated
  • In manifold only

Technical data

Hydraulic fluid mineral oil according to DIN 51524 (other fluids on request)
Fluid temperature range -20 to 120 °C
Ambient temperature range -20 to 120 °C
Viscosity range 10 to 400 mm2/s
Porting NG 4
Max. operating pressure port HP 700 bar
Max. operating pressure port LP 150 bar
Pressure setting range port LP 25 to 150 bar
Max. flow rate 40 l/min
Filtration (recommendation) class 21/19/16 according to ISO/ DIN 4406
Pressure loss (LP->T) 3 bar (at 25l/min and 32 mm 2/s)
Weight 0.28 kg (cartridge only)
Materials Cartridge body: Free-cutting steel, zinc plated
Cone: Hardened steel
Manifold: Corrosion-free steel
Back up ring: PTFE