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R900423720 DBDS6G1X/315 Rexroth Germany overflow valve
R900423720 DBDS6G1X/315 Rexroth Germany overflow valve
Specifications
Place of Origin :
Germany
Delivery Time :
2 weeks
Model :
DBDS 6 G1X / 315
Packaging Details :
wooden box
Max. Adjustable Relief Pressure :
315 bar (31.5 MPa)
Payment Terms :
Western Union,T/T,D/P,D/A,L/C
Supply Ability :
100
Certification :
ISO
Valve Type :
Direct-acting seat-type pressure relief valve (DBD series)
Part Number :
R900423720
Brand Name :
Rexroth
MOQ :
1
Nominal Size (NG) :
6
Model Number :
R900423720 DBDS6G1X/315
Description
R900423720 DBDS6G1X/315 Rexroth Germany Overflow Valve
Product Overview

Direct-acting seat-type pressure relief valve from the DBD series, designed for reliable pressure control in hydraulic systems.

Technical Specifications
ParameterValue
Part NumberR900423720
ModelDBDS 6 G1X / 315
Valve TypeDirect-acting seat-type pressure relief valve (DBD series)
Nominal Size (NG)6
Connection TypeScrew-in cartridge / threaded for manifold block (G = threaded connection, pipe thread G 1/4" ISO 228-1 on the cavity)
Adjustment TypeHexagon socket setscrew with protective cap (P1 equivalent, adjustable by Allen key), component series 1X
Max. Adjustable Relief Pressure315 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 Ports2 (P → T)
Seal MaterialNBR (standard)
Hydraulic FluidMineral oil HL, HLP per DIN 51524; HFC (water-glycol); HLPD, HVLP, HVLPD
Fluid Temperature Range-30 °C to +80 °C (NBR seals)
Viscosity Range10 - 800 mm²/s
Weight (approx.)1.56 kg
Body MaterialSteel, zinc-plated
R900423720 DBDS6G1X/315 Rexroth Germany overflow valve
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Frequently Asked Questions
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.
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R900423720 DBDS6G1X/315 Rexroth Germany overflow valve

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Product Detail
Place of Origin :
Germany
Delivery Time :
2 weeks
Model :
DBDS 6 G1X / 315
Packaging Details :
wooden box
Max. Adjustable Relief Pressure :
315 bar (31.5 MPa)
Payment Terms :
Western Union,T/T,D/P,D/A,L/C
Contact Supplier
R900423720 DBDS6G1X/315 Rexroth Germany overflow valve

Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.

Verified Supplier
2 Years
fujian
Business Type :
Manufacturer, Exporter
Main Products :
Gear Pump, Rexroth Hydraulic Pump, Parker Denison Hydraulic Pump
Total Annual :
1 million-10 millon
Employee Number :
>50
Certification Level :
Verified Supplier
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