R900425660 DBDS10P1X/400 German Rexroth plate overflow valve
Price:
Negotiable
MOQ:
1
Delivery Time:
2 weeks
Brand:
Rexroth
Product Description
R900425660 DBDS10P1X/400 German Rexroth Plate Overflow Valve
Direct-acting seat-type pressure relief valve from the DBD series, designed for reliable pressure control in hydraulic systems.
| Parameter | Value |
|---|---|
| Part Number | R900425660 |
| Model | DBDS 10 P1X / 400 |
| Valve Type | Direct-acting seat-type pressure relief valve (DBD series) |
| Nominal Size (NG) | 10 - subplate mounting per ISO 6264 / NG10 (DIN 24340 Form A) |
| 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. 100-120 L/min (Size 10 DBD) |
| Ports | 2 (P → T, Pressure to Tank) |
| 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.) | 3.7 kg |
| Body Material | Steel, zinc-plated |
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Frequently Asked Questions
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 spring preload.
What does "P1X / 400" mean?
- P1 = adjustment type: hexagon socket with protective cap (Allen key adjustable)
- 1X = component series index (dimensionally interchangeable within series 1X)
- /400 = spring pressure stage, maximum settable relief pressure = 400 bar
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.
Which subplate is required?
Use a standard NG10 (Size 10) subplate per ISO 6264 with P and T ports. The valve mounts via four M10 bolts (tightening torque approx. 35-40 N·m). Subplate port threads are commonly G 1/2" BSP or M18×1.5.
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.
Common fault symptoms & causes?
- Pressure won't reach set value: wrong spring grade (not /400), high T-backpressure, poppet sticking due to contaminated oil, damaged seating, or broken spring
- Continuous dribble / leak: damaged seating surface, aged O-ring, or contamination trapped in the seat — clean or replace
- Chatter / noise: air in the system, flow exceeding ~120 L/min, or line resonance — bleed air and confirm flow rating
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.
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Company
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
Location
Nan'an, Fujian Province, China
Contact Person
liyun