Unloading valves Type DA7000 pages

Unloading valves
NG 6 up to 700 bar
Features
•tDirect operated valve
•tPressure stability
•tSafe operation
•tPrecise pressure adjustment
•tPorting NG 6 according
t to DIN 24340
•tMaximum pressure setting
t with lock nut
Type DA700
up to 25 l/min
Application
The valve serves to shut-off the low-pressure flow depending on the prevailing pressure. As soon as the system reaches the
pre-set shut-off pressure, the low-pressure
flow is switched to non-pressurised circu-
Hydraulic fluidt
mineral oil according to DIN 51524
(other fluids on request)
Fluid temperature ranget
NBR: -30 to 80 °C
FPM: -20 to 80 °C
Ambient temperature ranget
-30 to 50 °C
Viscosity ranget
5 to 400 mm2/s
Portingt
NG 6 according to DIN 24340 / ISO 4401 / t
CETOP RP 121 H
Operating pressure max. connection Pt
700 bar
Pressure admissible max. connection A, Tt
350 bar
Flow rate max.t
25 l/min
Filtrationt
according to NAS 1638, class 6
or ISO/DIN 4406 17/15/12
Weightt
2,1 kg
Material / surface treatmentt
housing: steel, galvanized, chromated
cartridge: steel corrosion resistant
Technical data
lation, so that only the HP pump delivers
into the system. Once the pressure drops
below the pre-set value, the low-pressure
flow is added again. As the maximum
shut-off pressure is secured by lock nuts,
it cannot be exceeded by accident.
adjusting knob: plastic
Bieri Hydraulik AG | Könizstrasse 274 | CH-3097 Liebefeld | Tel. +41 31 970 09 09 | Fax +41 31 970 09 10 | www.bierihydraulics.com