REXROTH relief valve DBW10A2-52/350-6SMG24N9 is in stock.

Brand

REXROTH/German Rexroth

Application Areas

Chemical, Petroleum, Energy, Electrical, General

Main Functions of German REXROTH Relief Valves:

**Constant Pressure Relief Function:** In a fixed displacement pump throttling system, the pump provides a constant flow rate. When system pressure increases, the flow demand decreases. The relief valve opens, allowing excess flow to return to the tank, ensuring a constant inlet pressure (i.e., pump outlet pressure) (the valve opening fluctuates with pressure).

**Pressure Stabilization Function:** Connected in series in the return oil line, the relief valve generates back pressure, increasing the smoothness of moving parts.

**System Unloading Function:** A small-flow solenoid valve is connected in series with the relief valve's remote control port. When the solenoid is energized, the remote control port connects to the tank, unloading the hydraulic pump. The relief valve then functions as an unloading valve.

**Safety Protection Function:** The valve is closed during normal system operation. The relief valve opens only when the load exceeds the specified limit (system pressure exceeds the set pressure) to provide overload protection and prevent further pressure increase (typically, the set pressure of the relief valve is 10%~20% higher than the system's maximum working pressure).

In practical applications, it is generally used as a unloading valve, a remote pressure regulating valve, a high/low pressure multi-stage control valve, a sequence valve, and to generate back pressure (connected in series in the return oil line).

German REXROTH relief valves generally have two structures: 1. Direct-acting relief valve. 2. Pilot-operated relief valve.

German REXROTH

is a hydraulic

pressure control valve

primarily used in hydraulic equipment for constant pressure relief, pressure stabilization, system unloading, and safety protection. During assembly or use, damage to O-rings or combination seals, or loosening of mounting screws or pipe joints, can cause undue external leakage.

If the cone valve or main valve core is excessively worn, or there is poor contact at the sealing surface, excessive internal leakage can occur, even affecting normal operation.

REXROTH (Germany)

Main Functions

**Constant Pressure Relief Function:** In a fixed displacement pump throttling system, the pump provides a constant flow rate. When system pressure increases, the flow demand decreases. At this time, the relief valve opens, allowing excess flow to return to the oil tank, ensuring a constant inlet pressure (i.e., pump outlet pressure) for the relief valve (the valve opening fluctuates with pressure).

**Pressure Stabilization Function:** Connected in series in the return oil line, the relief valve generates back pressure, increasing the smoothness of moving parts.

**System Unloading Function:** A small-flow solenoid valve is connected in series with the remote control port of the relief valve. When the solenoid is energized, the remote control port of the relief valve connects to the oil tank, unloading the hydraulic pump. The relief valve then functions as an unloading valve.

**Safety Protection Function:** The valve is closed during normal system operation. It only opens when the load exceeds the specified limit (system pressure exceeds the set pressure) for overload protection, preventing further pressure increases (typically, the set pressure of the relief valve is 10%–20% higher than the system's maximum operating pressure).

In practical applications, relief valves are generally used as: unloading valves, remote pressure regulating valves, high and low pressure multi-stage control valves, sequence valves, and for generating back pressure (connected in series in the return oil line).

Relief valves generally have two structures: 1. Direct-acting relief valve. 2. Pilot-operated relief valve.

The main requirements for relief valves are: large pressure regulating range, small pressure regulating deviation, small pressure fluctuation, sensitive operation, large overload capacity, and low noise.

(Repeated text: German REXROTH)

The main requirements for relief valves are: large pressure regulating range, small pressure regulating deviation, small pressure fluctuation, sensitive operation, large overload capacity, and low noise.

(Repeated text: German REXROTH) DBDS20P10, DBDS10P10/200, DBDS10G12/200, DBDS20K18/50, DBDS6K1/315, DBDS6P10/315, DBDS20P18/315, DBDS10P18/315, DBDS6P10/315, DBDH10P18/200 , DBDS10G18/200V,

DBDS10G18/25, DBDS10K18/200, DBDS10K10/315, DBDS10K18/315, DBDS20G10/315V, DBDS20K18/200, DBDS20K10/315, DBDS20P10/315, DBDS10P10/315, DBDS10K10/400,

DBDS10G18/200, DBDH10G10/200, DBDS20K18/315, DBDS10K118/315, DBDS10K118/100, DBDS6K18/100, DBDS6K10/100, DBDS10K18/315, DBDS10K18/315, DBDS6K18/100, DBDS6K18/100

DBDS20P18/250, DBDS10K18/315, DBDS10K18/25, DBDS6K10/100, DBDS6K10/100, DBDS6G10/400, DBDS10P18/200, DBDS6K12/100, DBDS10G18/200, DBDS10P10/200,

DBDS10K18/25, DN10DBDS10K10/315, DBDS6K18/315, DBDS10P18/200, DBDS6K18/100, DBDS10P18/200, DBDS10K18/25, DBDS6P18/315, DBDS10P10/200 ,DBDS10K18/25,

DBDS6K18/100, DBDS10P18/200, DBDS10K18/25, DBDS10P18/200, DBDS10K18/25, DN10DBDS10K10/315 , DBDS6K10/315, DBDH10P/400, DBDH6P18/315, DBDS30G18/315,

DBDS6G18/315, DBDS10K18/315, DBDS20K18/315, DBDS20P18/200, DBDS20P10, DBDS30P18/200V, DBDS30K18/315V, DBDS30K18/315, DBDS30K18/25, DBDS25G18/315, DBDA20P18/25,

DBDA20G18/25, DBDA20K18/100, DBDA20K18/25V, DBDH20K18/50, DBDA15G18/25, DBDA10P18/, DBDA10G18/630V, DBDA10G18/25V, DBDA10K10/400, DBDH10P18/50V, DBDH10G18/315V,

DBDS10P10/25V, DBDS10K10/315V, DBDA6P18/25, DBDA6G18/315V, DBDS6P18/200V, DBDS6G18/315, DBDH25G18/50, DBDS20P10/315, DBDS20P10/100, DBDS20G10/400V,

DBDS20K18/25, DBDH15G18/100V, DBDH10P18/315, DBDH6P18/50V, DBDH6K18/400, DBDH6K 18/315, DBDS6P18/100, DBDS20G18/100V, DBDH10K18/50, DBDS6P18/50V, DBDS6K18/200,

DBDS10P18/50, DBDS10G18/315V, DBDA6G18/400V, DBDH6G10/315V, DBDS6P18/315V, D BDS6P18/200, DBDS30G10/200V, DBDS30G18/100, DBDH25G18/100V, DBDS25G18/315V,

DBDA20G18/50V, DBDA20 K18/50V, DBDS20G18/400, DBDS20K18/50, DBDS15G10/400, DBDA10P18/25V, DBDH10P18/50, DBDH10G18/400, DBDS10P10/630V, DBDS10G18/25V, DBDS10K18/25, DBDA8G18/25V, DBDH8G18 Rexroth relief valve DBDS20P10/400, DBDH6P18/100V, DBDS6P10/50, DBDS6K18/50, DBDH30G18/25, DBDH30K18/25, DBDS30G18/50, DBDS30K18/200, DBDA2 0P10/100, DBDH20P18/25, DBDS20P10/315, DBDS20P18/50, DBDS20K10/50V, DBDH10G18/100, DBDH1DBDA6K18/100V, DBDH6G18/400V, DBDS6G10/25, DBDH10P18/200V, DBDH10K18/630V, DBDS10G18/25, DBDS6G18/400V, DBDS6G18/400V, DBDS6K10/400V, DBDS6K18/50V, DBDS6K10/50V, DBDS20K10/100, DBDS20K10/25, DBDS6K12/100, DBDS10P10/200, DBDS10K18/25, DBDH6G10/315, DBDH6G18/400/12, DBD15G10/315, DBDS6K10/200, DBDS20P10/315

Preventive measures for German REXROTH relief valves: Measures to reduce or eliminate noise and vibration in pilot-operated relief valves:

Generally, vibration damping elements are added to the pilot valve section.

The damping sleeve is typically fixed in the front cavity of the pilot valve, i.e., the resonant cavity, and cannot move freely.

Variation damping sleeves are equipped with various damping holes to increase damping and eliminate vibration. Additionally, the addition of components in the resonant cavity reduces its volume, increasing the stiffness of the oil under negative pressure. Based on the principle that stiffer components are less prone to resonance, this reduces the likelihood of resonance.

Vibration damping pads generally move freely within the resonant cavity. Each pad has a throttling groove on both sides, which dampens the oil flow, altering its original flow pattern. The addition of the damping pad introduces a vibrating element, disrupting the original resonant frequency. The addition of the damping pad to the resonant cavity also reduces its volume and increases the stiffness of the oil under pressure, further reducing the likelihood of resonance. The vibration-damping plug has an air accumulator orifice and a throttling edge. Air is retained in the accumulator orifice; when compressed under pressure, this compressed air has a vibration-absorbing effect, acting as a miniature vibration absorber. When the air in the orifice is compressed, oil fills in; when it expands, oil is expelled, thus adding an additional flow to change the original flow pattern. Therefore, it can also reduce or eliminate noise and vibration.

Additionally, improper assembly or use of the relief valve itself can also cause vibration and noise. For example, in a three-section concentric relief valve, improper concentric alignment of the three sections during assembly, excessively high or low flow rates during use, or abnormal wear of the cone valve can all cause problems. In such cases, careful inspection and adjustment, or replacement of parts, are necessary.

The company mainly deals with European and American brands and can source brands from any European country. For example, our key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, ROSS

British brands: Norgren

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi