Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
| Supply Ability | 100 |
| Max. Flow Rate (Qmax) | approx. 50 L/min |
| Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Fluid Temperature Range | -30 °C to +80 °C (NBR seals) |
| Viscosity Range | 10 – 800 mm²/s |
| Max. Adjustable Relief Pressure | 400 bar (40 MPa) |
| Packaging Details | wooden box |
| Delivery Time | 2 weeks |
| Weight (approx.) | 1.62 kg |
| Certification | ISO |
| Model Number | R900423731 DBDS6P1X/400 |
| Place of Origin | Germany |
| Brand Name | Rexroth |
View Detail Information
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Product Specification
| Supply Ability | 100 | Max. Flow Rate (Qmax) | approx. 50 L/min |
| Payment Terms | Western Union,T/T,D/P,D/A,L/C | Fluid Temperature Range | -30 °C to +80 °C (NBR seals) |
| Viscosity Range | 10 – 800 mm²/s | Max. Adjustable Relief Pressure | 400 bar (40 MPa) |
| Packaging Details | wooden box | Delivery Time | 2 weeks |
| Weight (approx.) | 1.62 kg | Certification | ISO |
| Model Number | R900423731 DBDS6P1X/400 | Place of Origin | Germany |
| Brand Name | Rexroth | ||
| High Light | Rexroth overflow valve ，DBDS6P1X/400 hydraulic valve ，Germany made Rexroth valve | ||
|
Parameter |
Value |
|---|---|
|
Part Number |
R900423731 |
|
Model |
DBDS 6 P1X / 400 |
|
Valve Type |
Direct-acting seat-type pressure relief valve (DBD series) |
|
Nominal Size (NG) |
6 — subplate mounting per ISO 6264 / DIN 24340 Form A (NG6) |
|
Adjustment Type |
Hexagon socket setscrew with protective cap (P1X = index 1X, adjustable by Allen key) |
|
Max. Adjustable Relief Pressure |
400 bar (40 MPa) |
|
Max. Operating Pressure (P-port) |
630 bar |
|
Max. Flow Rate (Qmax) |
approx. 50 L/min |
|
Ports |
2 (P → T, Pressure to Tank) |
|
Seal Material |
NBR (standard, code omitted = NBR, suitable for mineral oil) |
|
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.) |
1.62 kg |
|
Body Material |
Steel, zinc-plated |
| DBDH 10G1X/630 R900424189 |
| DBDH 10 P1X/100 R900423739 |
| DBDH 10 P1X/200 R900426901 |
| 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 |
| DBDS 6 P1X/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 |
| DBDS 20 K1X/25 R900422542 |
| DBDS 20 K1X/50 R900424205 |
| DBDS 20 K1X/100 R900424267 |
| DBDS 20 K1X/315 R900424271 |
| DBDS 20 K1X/400 R900424203 |
| DBDS20G1X/25 R900422544 |
| DBDS20G1X/50 R900424276 |
| DBDS20G1X/100 R900424170 |
| DBDS20G1X/200 R900424172 |
| DBDS20G1X/315 R900424174 |
| DBDS 20 P1X/100 R900424274 |
| DBDS 20 P1X/200 R900424277 |
| DBDS 20 P1X/315 R900424278 |
| DBDS25G1X/25 R900433929 |
| DBDS25G1X/100 R900424263 |
| DBDS25G1X/200 R900424264 |
| DBDS25G1X/315 R900424265 |
| DBDS 30 K1X/25 R900422543 |
| DBDS 30 K1X/50 R900424282 |
| DBDS 30 K1X/100 R900424284 |
| DBDS 30 K1X/200 R900424286 |
| DBDS 30 K1X/315 R900424288 |
Frequently Asked Questions (FAQ)
Q1: Is this a pilot-operated or direct-acting relief valve?
It is a direct-acting seat valve (DBD series) — no pilot stage. The spring-loaded poppet/ball opens immediately when system pressure exceeds the set spring force.
Q2: What does "P1X / 400" mean?
P1 = adjustment type: hexagon socket with protective cap (Allen key adjustable).
1X = component series index (interchangeable within series 1X).
/400 = spring pressure stage, maximum settable relief pressure = 400 bar.
Q3: How do I adjust the relief pressure?
Depressurize the system, remove the protective cap, turn the internal setscrew with an Allen key — clockwise to increase, counterclockwise to decrease. Reinstall the cap and verify with a pressure gauge at the P-port. Factory preset is typically near the low end of the spring range; always adjust on-site to the required system pressure.
Q4: Which subplate is required?
Use a standard NG6 (Size 6) subplate per ISO 6264 with P and T ports (commonly G 1/4" or M14×1.5 threaded ports on the subplate). The valve mounts flush to the subplate via four M5 bolts (tightening torque approx. 8–10 N·m — refer to Rexroth mounting drawing).
Q5: Does T-port backpressure affect the set pressure?
Yes. The spring chamber drains internally to the T-port, so any backpressure at T adds 1:1 to the relief/cracking pressure. Keep T-line backpressure minimal or compensate in the setpoint.
Q6: Common fault symptoms?
Pressure won't reach set value: wrong spring grade (not /400), high T-backpressure, poppet sticking due to contaminated oil, or pump issue.
Continuous dribble / external leak: damaged seating surface, worn O-ring, or contamination trapped in the seat — clean or replace.
Chatter / noise: air in the system, flow exceeding 50 L/min, or excessive line resonance — bleed air and confirm flow rating.
Q7: Fluid & seal compatibility?
Standard NBR seals suit mineral oil (HL/HLP) and HFC (water-glycol). For HEES/HETG biodegradable oils or HFD phosphate ester, FKM (Viton) seals are required — order the "V" seal variant if needed.
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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