DBD REXROTH Overflow Valve Co., Ltd

NegotiableUpdate on 05/14

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Nature of the Manufacturer: Producers

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Overview

DBD REXROTH Overflow Valve Co., Ltd. ships the goods together and handles import procedures centrally, saving you on shipping and customs clearance costs; Through sound logistics procedures, air freight shipments are made at least once a week to shorten your delivery time; We transact in RMB or Euro, giving you different choices. We believe that through our continuous efforts and pursuit, we can achieve mutual benefit and win-win results with small and medium-sized enterprises!

Product Details

DBD REXROTH Overflow Valve Co., LtdThe DBD type REXROTH relief valve generally has a set pressure. Measure on the system display screen or with a pressure gauge whether the set pressure value is reached under the condition of system overflow? If it can be achieved and stable, it should be good. If it cannot be achieved, it can be cleaned once or the adjustment nut on the overflow valve can be adjusted to see if the pressure value changes. If it can be achieved, it is also acceptable. If it still cannot be achieved after adjustment or cannot be stabilized, it can be determined that the overflow valve has a fault and needs to be repaired or replaced.

In principle, the function of REXROTH Rexroth DBW10B25X/3156EG24N9K4 valve is consistent with that of DB type valve. However, unloading is performed on the main spool by controlling the directional valve operation. When changing to a pressure free cycle through a directional valve, in order to reduce the peak pressure of the fuel tank, a 4.1 type sliding slide valve can be used to design the main valve core. The REXROTH overflow valve DB type can affect the disconnection time through the throttle hole. Changing the orifice can extend or shorten the fracture time. It will not affect the overcurrent performance.

The main basis for Rexroth relief valves is their function in the system, rated pressure, maximum flow rate, pressure loss value, downstream performance parameters, and service life. How to choose the appropriate specifications (pressure rating and diameter) for Rexroth relief valves from product samples based on the maximum pressure of the hydraulic system and the flow rate through the valve.

1) The set pressure of Rexroth relief valve is the supply pressure of Rexroth hydraulic pump

2) The flow rate of Rexroth relief valve is selected according to the rated flow rate of Rexroth hydraulic pump. When used as Rexroth relief valve and unloading valve, it cannot be less than the rated flow rate of the pump. When used as safety valve, it can be less than the rated flow rate of the pump.

For various pressure valves on the connecting control oil circuit, due to the small actual flow rate passing through, they can be selected according to the minimum fixed flow specification of the valve, making the hydraulic device structure compact.

3) The structure of the valve can be selected according to the system performance requirements. For example, Rexroth direct acting pressure valves can be used for low-pressure systems, while Rexroth pilot pressure valves should be used for medium and high-pressure systems. Select Rexroth pressure valves with plate, tube, or stacked connections based on spatial location, pipeline layout, and other factors.

The various performance indicators of Rexroth pressure valves have an impact on hydraulic systems. Rexroth pressure valves can be selected according to the performance curve on the sample according to the system requirements. For example, the opening and closing characteristics, sensitivity, pressure overshoot, and leakage of Rexroth relief valves are related to the static and dynamic characteristics of the system. Therefore, in quantitative pump speed control systems, valves with small pressure overshoot and high opening and closing characteristics should be selected as flow control valves.

4) To avoid slow operation of Rexroth relief valve due to improper selection. Rexroth relief valves are divided into direct acting and pilot operated types. Direct acting type balances hydraulic pressure directly with spring force, while pilot operated type balances inlet pressure with pilot valve spring force and main valve spring. If a pilot operated flow valve is selected, when the pressure regulating screw or handle of the Rexroth relief valve is tightened and the valve switches from the unloaded state to the pressure regulating state, the main valve core is tightly against the valve cover and the main valve is fully opened for relief. When the pressure is adjusted, the main valve core and valve body maintain a small opening, and the time it takes for the Rexroth relief valve main valve core to fall from the unloading position to the required opening for pressure regulation is the rebound lag time of the Rexroth relief valve.

If the selection is improper and leads to a long lag time, the Rexroth overflow valve will act slowly. Then the diameter of the damping hole of the main valve core can be appropriately increased to reduce the lifting height of the main valve core.

5) Avoid hydraulic shock caused by improper selection. When the opening time of Rexroth overflow valve is longer than the system requirements, it will cause pressure shock or water hammer phenomenon in the system. At this time, it is necessary to choose a cone valve type or a direct acting flow valve.

6) Do not use P-type low-pressure Rexroth relief valve as an unloading valve. Due to the lack of an unloading port for the low-pressure Rexroth relief valve, it cannot be used as an unloading valve.

7) Avoid resonance between Rexroth relief valves with the same specifications and tuning parameters. As shown in Figure 2-73a, the specifications and setting values of Rexroth relief valves A and B are the same. When two pumps are connected in parallel to supply oil, sometimes the Rexroth relief valves make a lot of noise. When the setting pressures of the two Rexroth relief valves are shifted from each other, the noise can be basically eliminated. This indicates that two flow valves with the same set value are prone to resonance and should be avoided as much as possible. If another Rexroth overflow valve is selected and connected to point C, the above-mentioned noise problem can be solved.

DBD type REXROTH overflow valveTechnical Features

Flange connection;

Used for bottom plate installation;

Optional pressure adjustment components:

Hexagonal sleeve and protective cover, knob, lock buckle;

Electromagnetic unloading is achieved through the attached directional valve;

Internal and external pilot oil leakage;

Remote control port, optional;

Optional seat valve or slide valve;

Detailed information: High performance directional valve, connecting flange.

Some models of DBD REXROTH overflow valve Co., Ltd. are as follows:

Rexroth REXROTH Pilot operated Relief Valve