Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
| Packaging Details | wooden box |
| Delivery Time | 2 weeks |
| Model | DBDS 6 G1X / 315 |
| Valve Type | Direct-acting seat-type pressure relief valve (DBD series) |
| Max. Adjustable Relief Pressure | 315 bar (31.5 MPa) |
| Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Supply Ability | 100 |
| Part Number | R900423720 |
| Nominal Size (NG) | 6 |
| Place of Origin | Germany |
| Model Number | R900423720 DBDS6G1X/315 |
| Certification | ISO |
| Brand Name | Rexroth |
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Product Specification
| Packaging Details | wooden box | Delivery Time | 2 weeks |
| Model | DBDS 6 G1X / 315 | Valve Type | Direct-acting seat-type pressure relief valve (DBD series) |
| Max. Adjustable Relief Pressure | 315 bar (31.5 MPa) | Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Supply Ability | 100 | Part Number | R900423720 |
| Nominal Size (NG) | 6 | Place of Origin | Germany |
| Model Number | R900423720 DBDS6G1X/315 | Certification | ISO |
| Brand Name | Rexroth | ||
| High Light | Rexroth overflow valve DBDS6G1X ，Rexroth hydraulic valve with warranty ，DBDS6G1X overflow valve 315 bar | ||
|
Parameter |
Value |
|---|---|
|
Part Number |
R900423720 |
|
Model |
DBDS 6 G1X / 315 |
|
Valve Type |
Direct-acting seat-type pressure relief valve (DBD series) |
|
Nominal Size (NG) |
6 |
|
Connection Type |
Screw-in cartridge / threaded for manifold block (G = für Gewindeverbindung / threaded connection, pipe thread G 1/4" ISO 228-1 on the cavity) |
|
Adjustment Type |
Hexagon socket setscrew with protective cap (P1 equivalent, adjustable by Allen key), component series 1X |
|
Max. Adjustable Relief Pressure |
315 bar (31.5 MPa) |
|
Max. Operating Pressure (P-port) |
630 bar |
|
Max. Flow Rate (Qmax) |
approx. 50 L/min (for Size 6 DBD) |
|
Number of Ports |
2 (P → T) |
|
Seal Material |
NBR (standard, code omitted = NBR) |
|
Hydraulic Fluid |
Mineral oil HL, HLP per DIN 51524; HFC (water-glycol); HLPD, HVLP, HVLPD |
|
Fluid Temperature Range |
-30 °C to +80 °C (NBR seals) |
|
Viscosity Range |
10 – 800 mm²/s |
|
Weight (approx.) |
1.56 kg |
|
Body Material |
Steel, zinc-plated |
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Q1: Is DBDS6G1X/315 pilot-operated or direct-acting?
It is a direct-acting seat valve (DBD series). The ball/poppet opens immediately when system pressure overcomes the spring preload — no pilot stage is involved.
Q2: What does "G1X / 315" mean in the model?
G = designed for threaded/screw-in cartridge installation into a manifold block with G 1/4" threaded cavity.
1X = component series index (dimensionally interchangeable within series 1X).
/315 = spring pressure stage — maximum adjustable relief pressure is 315 bar.
Q3: How do I install this valve?
The valve screws into a prepared manifold block cavity with G 1/4" ISO 228-1 threaded port. Ensure the P-port in the block aligns with system pressure and T-port connects to tank. Use appropriate sealing (O-ring on the cartridge shoulder or thread sealant on the threaded portion as per the cavity drawing). Torque typically approx. 45–50 N·m — refer to the official Rexroth mounting drawing for your specific cavity.
Q4: How do I adjust the relief pressure?
With the system depressurized, remove the protective cap, turn the internal setscrew with an Allen key — clockwise to increase, counterclockwise to decrease. Reinstall the cap after setting and verify with a pressure gauge at the P-port. Factory preset is typically near the low end of the spring range; always re-set on-site.
Q5: Does T-port backpressure affect the set pressure?
Yes. Backpressure at the tank side adds 1:1 to the cracking/relief pressure because the spring chamber drains internally to T. Keep T-line backpressure minimal or subtract it from your desired setpoint during adjustment.
Q6: What if the valve does not reach set pressure or chatters?
Low/no pressure: Wrong spring grade, high T-backpressure, or severely contaminated oil causing poppet sticking.
Chatter / noise: Air in the system, excessive flow beyond Qmax for Size 6, or remote piping resonance — bleed air from the system and confirm flow ≤50 L/min.
Leakage in closed position: Damaged seating surface or contaminated oil trapped in the seat — clean or replace the cartridge.
Q7: Can it be used with biodegradable or water-based fluid?
Standard NBR seals are approved for HFC (water-glycol). For HEES/HETG biodegradable oils or HFD (phosphate ester), FKM (Viton) seals are required — order the "V" seal variant if needed and verify fluid compatibility.
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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