Pack up all
The valve prevents flow from ① to ② until pressure at ① exceeds the set crack pressure
and opens the pilot section. The pilot flow creates a pressure differential across the
poppet which causes the valve to open allowing flow from ① to ② protecting the circuit
from over pressurization.
Pressure at ② is directly additive to the relief setting of the valve.
If the pressure at ② is at least 2 bar higher than Pressure at ① . The main poppet will be
lifted out of its seat, to allow flow from ② to ① , this feed function is used to make up
for lacking hydraulic fluid volumes.
By connecting pilot oil pressure to the external port ③ , the control piston is pressurized
and lifted. This reduces the preload of the main spring and the maximum set system
Technical Data420barSee PRESSURE DROP VS.FLOW graph.Rexroth-LGRefer to "Cleanliness of Hydraulic Fluid"10 drops/min. max. to 80% of nominal setting-40ºF to +250ºF(-40ºC to +120ºC)Mineral-based fluids with viscosities of 7.4 to 420 cSt.Steel & Ductile iron rated to 350bar
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