Product Features
- Mounting surface complies with DIN24340A and ISO4401
-4 pressure ranges
-2 types of adjustment
Knob
Adjusting bolt with protective cover
- With pressure gauge interface
The 3DR10P valve is a three-way pressure reducing valve used to limit the pressure in the secondary circuit and ensure the secondary pressure is stable. It is used to reduce the pressure in a local circuit.
The valve is composed of a valve body (1), a control valve core (2) and a pilot valve body (3) with an adjusting device (10).
In the static state, the valve is normally open and the oil can flow freely from P to A. The pressure of port A acts on the compression spring (9) through the control oil circuit (4).
At the same time, the oil acts on the ball valve (7) in the pilot valve (3) through the orifice (6) and the oil passage (5). According to the setting of the spring (11), pressure is built up in the oil port (5) in front of the ball valve (7), keeping the control valve core in the open position. The oil can flow freely from P to the oil port A through the control valve core (2) until the oil port pressure exceeds the setting value of the spring (11) and opens the ball valve (7). The control valve core (2) moves to the closed position. When the pressure at the oil port A and the setting pressure of the spring (11) reach equilibrium, the desired reduced pressure is obtained.
If the pressure at port A continues to increase due to external force, the control valve core (2) moves further in the direction of the spring (9). This connects port A and port T through the groove (8) on the valve core (2). Excess oil flows back to the tank to ensure that the pressure does not increase further.
The control oil in the spring chamber (12) must flow from the outside through the oil passage (13) to the oil port Y and then be discharged into the oil tank without back pressure.
The pressure gauge interface (14) can monitor the reduced pressure at port A.
Working medium temperature range |
ºC |
-30 ~+80 (NBR seals) |
-20 ~+80 (Fluorine Rubber Seal) |
Nominal pressure |
bar |
315 |
Maximum flow rate |
L/min |
120 |
Working medium |
Mineral oil; phosphate ester |
Viscosity range |
mm2/s |
10~800 |
Oil contamination degree |
Maximum oil contamination according to NAS 1638 Class 9 and ISO 4406 Class 20/18/15 |
Weight |
kg |
6.5 |
Hebei Ding'an Hydraulic Machinery Co., Ltd. is a professional company integrating the research, production and sales of hydraulic valves. It is an ISO9001:2000 quality management system certified enterprise. The company currently has fixed assets of more than 10 million yuan, covers an area of 16,000 square meters, has strong technical force, and has more than ten years of experience in the development and production of hydraulic valves. It can quickly and high-quality develop various mining and engineering machinery hydraulic valves according to customer requirements.