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The DBDS10G1X/315 is a direct-acting seat-type pressure relief valve from Rexroth's DBD series, designed for precise pressure control in hydraulic systems. This screw-in cartridge version offers reliable performance with maximum adjustable relief pressure of 315 bar.
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 overcomes the spring preload.
Q2: What does "G1X / 315" mean?
G = screw-in cartridge version with threaded port connection (G 1/2" ISO 228-1 on the cavity), for installation in a manifold block
1X = component series index (dimensionally interchangeable within series 1X)
/315 = spring pressure stage, maximum settable relief pressure = 315 bar
Q3: How is this different from the DBDS10P1X/315?
The P-version mounts on a NG10 subplate (sandwich style, bolted). The G-version (this item) screws into a machined manifold block cavity with G 1/2" threaded port — no subplate required. Function and spring stage are the same.
Q4: How do I install this valve?
Screw the cartridge into the prepared manifold block cavity (G 1/2" threaded bore per Rexroth drawing). Ensure P-port in the block aligns with system pressure and T-port connects to tank. Typical tightening torque approx. 80-90 N·m — refer to the official Rexroth cavity drawing. Use appropriate O-ring sealing on the cartridge shoulder.
Q5: 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.
Q6: 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.
Q7: Common fault symptoms?
Pressure won't reach set value: wrong spring grade, high T-backpressure, poppet sticking due to contaminated oil, damaged seating
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
Q8: 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...
