DR5DP0 pages

DIRECT OPERATED PRESSURE
REDUCING VALVE TYPE DR5DP
Size 5

21 MPa

15 dm3/min

WK
WK
450 448
450 447
04.1999r.
04.2011

Direct operated pressure reducing valve DR5DP is used to
limit secondary pressure. It may be mounted in a hydraulic
system in any position.

DESCRIPTION OF OPERATION

Pressure reducing valves consists basically of the housing
1, control spool 2, pressure springs 3, setting element 4
and optional check valve 5. A control element is the spool
2, which is held in neutral position in the housing 1 by the
springs 3. In neutral position the valve is open.
Oil flows from port P through the housing to port A. At the

same time pressure in port A affects the spool surface opposite the springs via control line 6. The control line 6 made
in the moveable spool 2 is closed by the plug 7. If pressure
at port A exceeds the value set at the spring, the spool 2
moves and reduces the flow from P to A.
A check valve can be fitted in order to allow free return flow
from port A to P.

TECHNICAL DATA
Hydraulic fluid

Mineral oil or phosphate ester

Nominal fluid viscosity

37 mm2/s at the temperature of 328 K

Viscosity range

2.8 to 380 mm2/s

Optimum working temperature( fluid in a tank )

313 - 328 K

Fluid temperature range

243 - 343 K

Required fluid filtration

16 Pm

Recommended fluid filtration

10 Pm

Pressure in ports P, A, B ( X )

21 MPa

Backpressure pressure in port Y ( T )

6.0 MPa

Maximum flow rate

15 dm3/min

Weight

1.4 kg
−1−

WK 450 447
WK 450 448