Function and configurationsThe pressure valve type 3DR10P is a pilot operated 3-way pressure reducing valve with pressure limitation in the secondary circuit. It is used for reducing pressure in a hyd...
Product Detail
Function and configurations
The pressure valve type 3DR10P is a pilot operated 3-way pressure reducing valve with pressure limitation in the secondary circuit. It is used for reducing pressure in a hydraulic system.
The pressure reducing valve consists mainly of main valve (1), control spool (2) and pilot control valve (3) with pressure adjustment element (10).
At static state, the valves are normally open, fluid flows free from port P to port A. The pressure in port A is applied via the channel (4) to the spool area opposite to the compression spring (9). Fluid also acts on the ball valve (7) of the pilot valve (3) via the throttle orifice (6) and channel (5). Based on the setting value of the spring (11), control piston keeps open, then fluid can flow free from port P to port A, until pressure at port A exceed the setting value of spring (11), and then ball valve (7) is opened. Control piston (2) moves to close position. When pressure at port A is balanced with setting value at spring (11), pressure reducing is achieved as expected.
If the pressure in port A continuously increases due to external forces, the control spool (2) is moved still further against the compression spring (9). Thus port A is connected to port T via the control lands (8) at the control spool (2). Enough fluid flows to tank to ensure that the pressure does not rise any further.
The pilot oil returns from spring chamber (12) to tank without back pressure via control line (13) to port Y.
A pressure gauge connection(14) makes it possible to monitor the reduced pressure in port A.
Ordering code
Technical data
| Fluid | Mineral oil suitable for NBR and FKM seal | |
| Phosphate ester for FKM seal | ||
| Fluid temperature range ℃ | -30 to +80 (NBR seal) | |
| -20 to +80 (FKM seal) | ||
| Viscosity range m㎡/s | 10 to 800 | |
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9. NAS 1638 or 20/18/15, ISO4406 | |
| Nominal pressure bar | 315 | |
| Max.operating pressure | port P bar | 315 |
| Max.operating pressure | port A bar | 315 |
| Max.operating pressure | port Y bar | Separate and at zero pressure to tank |
| Setting pressure | Min. bar | Dependent on the flow (see curves) |
| Max. bar | 50;100;200;315 | |
| Max.flow-rate L/min | 120 | |
| Weight kg | Approx.6.5 | |
Characteristic curves (Measured at oil =40°C +5°C, using HLP46)
11
Unit dimensions
