The Bosch Rexroth R900423721 (type DBDS6G1X/400) is a genuine pressure relief valve with NG6, up to 400 bar, Threaded connection, pipe thread ISO 228-1. RendatSP supplies it new and original, ready to ship worldwide.
Pressure relief valves protect pumps, hoses and cylinders by limiting the maximum system pressure. A worn seat or broken spring causes pressure loss, overheating and slow machine cycles, so the relief valve is one of the first parts to check on any hydraulic power unit. Ordering the same Rexroth type code guarantees the same pressure stage, connection type and adjustment style as the original.
Technical Specifications
| Brand | Bosch Rexroth |
|---|---|
| Material number | R900423721 |
| Type designation | DBDS6G1X/400 |
| Type | Direct-operated pressure relief valve (poppet) |
| Size | NG6 |
| Connection | Threaded connection (G), pipe thread ISO 228-1 |
| Port | G1/4 |
| Series | 1X |
| Set pressure range | up to 400 bar |
| Pressure adjustment | Bushing with hexagon and protective cap (S) |
| Seals | NBR |
| Series max. operating pressure | 630 bar (DBD family) |
| Symbol | P → T |
| Hydraulic fluids | HL, HLP, HLPD, HVLP, HVLPD, HFC |
| Condition | New, original, factory packaged |
How to Read the Type Code DBDS6G1X/400
| DBD | Direct-operated pressure relief valve |
|---|---|
| S | Adjustment: bushing with hexagon and protective cap |
| 6 | Size 6 |
| G | Threaded connection (G), pipe thread ISO 228-1 |
| 1X | Component series 10-1Z |
| 400 | Set pressure up to 400 bar |
Rexroth type codes are configuration-specific: a different letter or number in any position gives a different material number. Always compare the full code with the nameplate of your original part.
Typical Applications
Pressure limiting / system protection in hydraulic power units, pump circuits, test benches and machine hydraulics. Supplied to factories, OEMs and maintenance teams in Saudi Arabia, the UAE, Iraq, Qatar, Kuwait, Oman, Egypt and worldwide.
Related Parts
- Seal kit DBD (NBR/FKM)
- Cartridge cavity / line body for DBD
- Pressure gauge
Frequently Asked Questions
Is the R900423721 a genuine Bosch Rexroth part?
Yes. RendatSP supplies the R900423721 as a new, original Bosch Rexroth part in factory packaging. We confirm the exact type code against your nameplate before shipping.
Can I use a valve with a higher pressure stage and set it lower?
It is possible within limits, but the setting becomes less precise and less safe. We recommend the same pressure stage as the original valve.
What does the number after the slash mean?
It is the pressure stage, the maximum adjustable set pressure in bar (for example /100 = up to 100 bar).
Is the valve delivered pre-set?
Rexroth relief valves are normally set to a factory value and must be adjusted to the machine’s required pressure during commissioning.
Request a Quotation
Send us the part number R900423721, the required quantity and a photo of the nameplate if available. We reply with price and delivery time within hours and ship worldwide by express courier. Browse all Bosch Rexroth parts.
