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Hexagon socket setscrew with protective cap (P1X = index 1X, adjustable by Allen key)
Max. Adjustable Relief Pressure
200 bar (20 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.)
3.6-3.7 kg
Body Material
Steel, zinc-plated
Product Image
Related Products
DBDH 10G1X/630 R900424189
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DBDH 10 P1X/200 R900426901
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DBDH 20 K1X/25 R900427601
DBDH 20 K1X/50 R900423028
DBDH 20 K1X/100 R900424112
DBDH 20G1X/50 R900424165
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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 / 200" mean?
P1 = adjustment type: hexagon socket with protective cap (Allen key adjustable). 1X = component series index (dimensionally interchangeable within series 1X). /200 = spring pressure stage, maximum settable relief pressure = 200 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 — refer to Rexroth mounting drawing). 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?
Pressure won't reach set value: wrong spring grade (not /200), high T-backpressure, poppet sticking due to contaminated oil, or undersized pump. Continuous dribble / leak: damaged seating surface, worn 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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
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...
