Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
| Operating Temperature | -20°C to +70°C (with NBR seals) |
| Delivery Time | 2 weeks |
| Pressure Setting Range | Up to 400 bar (Spring Code /400) |
| Certifiion | ISO |
| Supply Ability | 100 |
| Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Packaging Details | wooden box |
| Max. Flow Rate | ~250 L/min (Recommended); Peak transient up to 330 L/min |
| Cavity Requirement | Standard DBD NG20 (Typically M45×1.5) |
| Weight | Approx. 0.92 kg |
| Model Number | R900424203 DBDS20K1X/400 |
| Brand Name | Rexroth |
| Place of Origin | German |
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Product Specification
| Operating Temperature | -20°C to +70°C (with NBR seals) | Delivery Time | 2 weeks |
| Pressure Setting Range | Up to 400 bar (Spring Code /400) | Certifiion | ISO |
| Supply Ability | 100 | Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Packaging Details | wooden box | Max. Flow Rate | ~250 L/min (Recommended); Peak transient up to 330 L/min |
| Cavity Requirement | Standard DBD NG20 (Typically M45×1.5) | Weight | Approx. 0.92 kg |
| Model Number | R900424203 DBDS20K1X/400 | Brand Name | Rexroth |
| Place of Origin | German | ||
| High Light | Rexroth overflow valve DBDS20K1X/400 ，German Rexroth hydraulic valve ，Original Rexroth overflow valve 400 bar | ||
| General Information | |
|---|---|
| Manufacturer / Model | Rexroth (Germany), DBDS20K1X/400 |
| Part Number | R900424203 |
| Valve Type | Direct-Operated Pressure Relief Valve (Screw-in Cartridge, Poppet Type) |
| Performance Parameters | |
| Nominal Size | NG20 |
| Max. Operating Pressure (Body) | 630 bar |
| Pressure Setting Range | Up to 400 bar (Spring Code /400) |
| Max. Flow Rate | ~250 L/min (Recommended); Peak transient up to 330 L/min |
| Function | Normally Closed (P→T opens at set pressure) |
| Mechanical Interface | |
| Mounting Style | Screw-in Cartridge |
| Cavity Requirement | Standard DBD NG20 (Typically M45 ×1.5) |
| Port Connection | G1" |
| Adjustment Type | Hexagonal Bushing with Protective Cap (Standard) |
| Weight | Approx. 0.92 kg |
| Media & Environment | |
| Seal Material | NBR (Standard for mineral oil) |
| Compatible Fluids | Mineral Oils (HL/HLP), HETG (Vegetable Oils), Biodegradable Fluids |
| Operating Temperature | -20 °C to +70°C (with NBR seals) |
| Fluid Cleanliness | ISO 4406 20/18/15 or cleaner |
| DBDH 10P1X/315 R900424186 | DBDH 20 K1X/25 R900427601 |
| DBDH 20 K1X/50 R900423028 | DBDH 20 K1X/100 R900424112 |
| DBDH 20G1X/50 R900424165 | DBDH 20G1X/100 R900424108 |
| DBDH 30 K1X/25 R900445875 | DBDH 30 K1X/50 R900424193 |
| DBDS 6 K1X/25 K900420245 | DBDS 6 K1X/50 R900423727 |
| DBDS 6 K1X/100 R900423723 | DBDS 6 K1X/200 R900423724 |
| DBDS 6 K1X/315 R900423725 | DBDS6K1X/400 R900423726 |
| DBDS6G1X/25 R900423718 | DBDS6G1X/50 R900423722 |
| DBDS6G1X/100 R900423717 | DBDS6G1X/200 R900423719 |
| DBDS6G1X/315 R900423720 | DBDS6G1X/400 R900423721 |
| DBDS6P1X/25 R900429414 | DBDS6P1X/50 R900423732 |
| DBDS6P1X/100 R900423728 | DBDS6P1X/200 R900423729 |
| DBDS6P1X/315 R900423730 | DBDS6P1X/400 R90Q423731 |
| DBDS 10 K1X/25 R900420276 | DBDS 10 K1X/50 R900424153 |
| DBDS 10 K1X/100 R900424147 | DBDS 10 K1X/200 R900424149 |
| DBDS 10 K1X/315 R900424150 | DBDS 10 K1X/400 R900424152 |
| DBDS 10 K1X/630 R900427601 | DBDS 10G1X/25 R900423743 |
| DBDS 10G1X/50 R900424745 | DBDS 10G1X/100 R900424738 |
| DBDS 10G1X/200 R900424140 | DBDS 10G1X/315 R900424742 |
| DBDS 10G1X/400 R900424744 | DDDS 10 P1X/25 R900426905 |
| DBDS 10 P1X/100 R900424155 | DBDS 10 P1X/315 R900424158 |
| DBDS 10 P1X/400 R900425660 | DBDS 15G1X/100 R900424162 |
| DBDS 15G1X/200 R900424163 | DBDS 15G1X/315 R900424165 |
No. The "/400" indies this valve is equipped with a specific spring for the 400 bar pressure stage. Although the valve body is rated for 630 bar, the spring in this model is designed for reliable adjustment only up to 400 bar. Attempting to set it to 500 bar will result in inaccurate pressure control and potential spring damage. For higher pressures, select a model with a /630 spring code.
This is an NG20 size cartridge. You must use a standard DBD NG20 threaded cavity (commonly M45 ×1.5). The recommended tightening torque is typically 120-150 Nm, but you should confirm this in the technical data sheet to avoid damaging the threads or seals.
Backpressure is fully additive. Any pressure at the T-port directly adds to the pressure required to open the valve. For example, if the valve is set to 380 bar and the T-port has 20 bar of backpressure, the system will relieve at 400 bar. Ensure the total pressure (set pressure + T-port backpressure) does not exceed the valve's maximum rating of 630 bar.
Common causes for chatter in direct-acting relief valves include:
No. The standard R900424203 with NBR seals is not compatible with water glycol (HFC) or phosphate ester (HFD) fluids. For these appliions, you must order a variant with FKM (Viton®) seals, which are typically denoted by a /V suffix in the model code (e.g., DBDS20K1X/400V).
Company Details
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
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