R900939736 DBW20A1-5X/315-6EG24N9K4 Rexroth Germany original electromagnetic relief valve
Price:
Negotiable
MOQ:
1
Delivery Time:
2 weeks
Brand:
Rexroth
Product Description
R900939736 DBW20A1-5X/315-6EG24N9K4 Rexroth Germany Original Electromagnetic Relief Valve
Product Overview
Pilot-operated pressure relief valve with integrated solenoid unloading (DBW series). This high-performance valve provides pressure limiting at set value with solenoid-actuated system unloading capability.
Technical Specifications
| Part Number | R900939736 |
| Model | DBW 20 - A1 - 5X / 315 - 6EG24N9K4 |
| Valve Type | Pilot-operated pressure relief valve with integrated solenoid unloading (DBW series) |
| Nominal Size (NG) | 20 – subplate mounting per ISO 6264 / NG20 |
| Function | Pressure limiting at set value + solenoid-actuated system unloading (energize → P→T open, system near 0 bar) |
| Adjustment Type | A1 = Hexagon socket setscrew with protective cap (Allen key adjustable) |
| Component Series | 5X (series 50-59, dimensionally interchangeable) |
| Max. Adjustable Relief Pressure | 315 bar (adjustment range typically 4-315 bar) |
| Max. Operating Pressure (P-port) | 350 bar |
| Max. Flow Rate (Qmax) | approx. 500 L/min (Size 20 DB/DBW series) |
| Pilot Oil | Internal pilot supply, internal pilot drain (standard DBW) |
| Solenoid Type | Wet-pin DC solenoid |
| Solenoid Voltage | 24 V DC (G24) |
| Electrical Connection | Plug-in socket per EN 175301-803 Form A (K4 = mating plug sold separately) |
| Manual Override | N9 = concealed push-button manual override on coil |
| Seal Material | NBR (standard, for mineral oil HL/HLP, HFC) |
| 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.) | 7.9 kg |
| Body Material | Cast iron / steel, zinc-plated |
Related Part Numbers
R901382370 4WRPEH6C5B24L-3X/M/24A1
R901382371 4WRPEH6CB12L-3X/M/24F1
R901382372 4WRPEH6CB24L-3X/M/24F1
R901382374 4WRPEH6CB04L-3X/M/24F1
R901382375 4WRPEH6CB40P-3X/M/24F1
R901382376 4WRPEH6CB02L-3X/M/24F1
R901382487 4WRPEH6C1B40L-3X/M/24F1
R901382488 4WRPEH6C3B04L-3X/V/24A1
R901382489 4WRPEH6C6B02L-3X/M/24A1
R901382490 4WRPEH6CB25P-3X/M/24A1
R901382491 4WRPEH6C1B24L-3X/M/24F1
R901382492 4WRPEH6CB04P-3X/M/24A1
R901382493 4WRPEH6C4B40L-3X/V/24A1
R901382495 4WRPEH6C1B40P-3X/M/24A1
R901382496 4WRPEH6C3B04P-3X/V/24A1
R901382502 4WRPEH6C3B04P-3X/M/24F1
R901382503 4WRPEH6C3B12L-3X/V/24A1
R901382504 4WRPEH6C3B08L-3X/V/24F1
R901382505 4WRPEH6CB04L-3X/V/24F1
R901382509 4WRPEH6C4B40L-3X/V/24F1
R901382510 4WRPEH6C5B24L-3X/M/24F1
R901382511 4WRPEH6C3B15P-3X/M/24F1
R901382512 4WRPEH6C4B40P-3X/M/24F1
R901382513 4WRPEH6C3B12L-3X/V/24F1
R901382514 4WRPEH6C3B04L-3X/V/24F1
R901382515 4WRPEH6C5B04L-3X/M/24F1
R901382516 4WRPEH6C3B40L-3X/V/24F1
R901382517 4WRPEH6C5B12L-3X/M/24F1
R901382519 4WRPEH6C5B12L-3X/M/24A1
R901382520 4WRPEH6CB02L-3X/M/24A1
R901382521 4WRPEH6C4B15P-3X/M/24F1
R901382522 4WRPEH6C3B15P-3X/V/24A1
R901382523 4WRPEH6C4B24L-3X/V/24F1
R901382524 4WRPEH6C5B04L-3X/M/24A1
R901382525 4WRPEH6C4B02L-3X/V/24F1
R901382526 4WRPEH6CB24L-3X/V/24F1
R901382527 4WRPEH6C1B24L-3X/M/24A1
R901382528 4WRPEH6C4B04L-3X/V/24F1
R901382530 4WRPEH6CB15P-3X/M/24A1
R901382532 4WRPEH6C4B25P-3X/M/24F1
R901382533 4WRPEH6C4B04P-3X/M/24A1
R901382534 4WRPEH6C5B40L-3X/V/24F1
R901382535 4WRPEH6C3B25P-3X/M/24F1
R901382537 4WRPEH6C3B04P-3X/V/24F1
R901382538 4WRPEH6C1B12L-3X/M/24A1
R901382539 4WRPEH6C3B40P-3X/M/24F1
R901382630 4WRPEH6CB40P-3X/M/24A1
R901383468 4WRPEH6C4B12L-2X/G24K0/F1V
R901387787 4WRPEH6CB04L-2X/G24K0/C6V
R901387788 4WRPEH6C4B40L-2X/G24K0/C6V
R901396859 4WRPEH6C3B08L-3X/M/24A1
R901396969 4WRPEH6C3B04L-3X/M/24F1-885
R901402614 4WRPEH6C3B24L-3X/G24K0/A1M=KM
R901402817 4WRPEH6C3B24L-2X/G24K0/A1M=KM
R901408241 4WRPEH6C5B24L-3X/V/24A1
R901409296 4WRPEH6C3B02L-2X/G24K0/A1M-816=KM
R901410492 4WRPEH6C3B40L-3X/M/24A1-15
R901412522 4WRPEH6C4B12L-3X/M/24A1-561
R901382371 4WRPEH6CB12L-3X/M/24F1
R901382372 4WRPEH6CB24L-3X/M/24F1
R901382374 4WRPEH6CB04L-3X/M/24F1
R901382375 4WRPEH6CB40P-3X/M/24F1
R901382376 4WRPEH6CB02L-3X/M/24F1
R901382487 4WRPEH6C1B40L-3X/M/24F1
R901382488 4WRPEH6C3B04L-3X/V/24A1
R901382489 4WRPEH6C6B02L-3X/M/24A1
R901382490 4WRPEH6CB25P-3X/M/24A1
R901382491 4WRPEH6C1B24L-3X/M/24F1
R901382492 4WRPEH6CB04P-3X/M/24A1
R901382493 4WRPEH6C4B40L-3X/V/24A1
R901382495 4WRPEH6C1B40P-3X/M/24A1
R901382496 4WRPEH6C3B04P-3X/V/24A1
R901382502 4WRPEH6C3B04P-3X/M/24F1
R901382503 4WRPEH6C3B12L-3X/V/24A1
R901382504 4WRPEH6C3B08L-3X/V/24F1
R901382505 4WRPEH6CB04L-3X/V/24F1
R901382509 4WRPEH6C4B40L-3X/V/24F1
R901382510 4WRPEH6C5B24L-3X/M/24F1
R901382511 4WRPEH6C3B15P-3X/M/24F1
R901382512 4WRPEH6C4B40P-3X/M/24F1
R901382513 4WRPEH6C3B12L-3X/V/24F1
R901382514 4WRPEH6C3B04L-3X/V/24F1
R901382515 4WRPEH6C5B04L-3X/M/24F1
R901382516 4WRPEH6C3B40L-3X/V/24F1
R901382517 4WRPEH6C5B12L-3X/M/24F1
R901382519 4WRPEH6C5B12L-3X/M/24A1
R901382520 4WRPEH6CB02L-3X/M/24A1
R901382521 4WRPEH6C4B15P-3X/M/24F1
R901382522 4WRPEH6C3B15P-3X/V/24A1
R901382523 4WRPEH6C4B24L-3X/V/24F1
R901382524 4WRPEH6C5B04L-3X/M/24A1
R901382525 4WRPEH6C4B02L-3X/V/24F1
R901382526 4WRPEH6CB24L-3X/V/24F1
R901382527 4WRPEH6C1B24L-3X/M/24A1
R901382528 4WRPEH6C4B04L-3X/V/24F1
R901382530 4WRPEH6CB15P-3X/M/24A1
R901382532 4WRPEH6C4B25P-3X/M/24F1
R901382533 4WRPEH6C4B04P-3X/M/24A1
R901382534 4WRPEH6C5B40L-3X/V/24F1
R901382535 4WRPEH6C3B25P-3X/M/24F1
R901382537 4WRPEH6C3B04P-3X/V/24F1
R901382538 4WRPEH6C1B12L-3X/M/24A1
R901382539 4WRPEH6C3B40P-3X/M/24F1
R901382630 4WRPEH6CB40P-3X/M/24A1
R901383468 4WRPEH6C4B12L-2X/G24K0/F1V
R901387787 4WRPEH6CB04L-2X/G24K0/C6V
R901387788 4WRPEH6C4B40L-2X/G24K0/C6V
R901396859 4WRPEH6C3B08L-3X/M/24A1
R901396969 4WRPEH6C3B04L-3X/M/24F1-885
R901402614 4WRPEH6C3B24L-3X/G24K0/A1M=KM
R901402817 4WRPEH6C3B24L-2X/G24K0/A1M=KM
R901408241 4WRPEH6C5B24L-3X/V/24A1
R901409296 4WRPEH6C3B02L-2X/G24K0/A1M-816=KM
R901410492 4WRPEH6C3B40L-3X/M/24A1-15
R901412522 4WRPEH6C4B12L-3X/M/24A1-561
Frequently Asked Questions (FAQ)
Q1: What is the difference between DB and DBW?
DB is a pilot relief valve only – limits system pressure. DBW adds an integrated directional solenoid valve: when energized the main stage is unloaded (P→T open, near 0 bar); when de-energized it works as a normal relief valve at the set pressure.
Q2: How is Size 20 (NG20) different from Size 10 (NG10)?
- Flow: NG20 handles approx. 500 L/min vs ~250 L/min for NG10
- Mounting: NG20 uses four M12 bolts (torque 70-80 N·m) on an NG20 subplate (G 3/4" or M27×2 ports); NG10 uses M10 bolts on NG10 subplate
- Pressure stages & solenoid specs are identical
Q3: How do I adjust the relief pressure?
With system depressurized, remove the protective cap, turn the setscrew with an Allen key – clockwise to increase, counterclockwise to decrease. Factory preset is typically near minimum of the spring range. Reinstall cap and verify with a pressure gauge. The solenoid does NOT change the set pressure.
Q4: What is the solenoid logic?
Standard: Solenoid DE-energized = relief active at set pressure. Solenoid ENERGIZED = system unloaded (P connected to T). Confirm this matches your PLC/control logic before wiring.
Q5: Which subplate and electrical connector are needed?
- Subplate: standard NG20 (ISO 6264) with P and T ports (G 3/4" BSP or M27×2 on subplate), four M12 bolts @ ~70-80 N·m
- Electrical: EN 175301-803 Form A (DIN 43650-A) 3-pin + PE connector, 24 V DC. If the plug has LED indication, observe (+) / (-) polarity markings
Q6: Common faults & causes?
- Solenoid clicks but system does NOT unload: pilot orifice clogged, main spool stuck, no coil current (check ~18-28 Ω), manual override jammed
- Pressure won't reach set value / creeps early: wrong spring (not /315), pilot damping hole blocked, contaminated pilot seat, excessive T-backpressure (internal pilot drain)
- Coil overheats / burnt smell: overvoltage (>10% above 24V), wrong voltage coil fitted – replace only with correct G24 wet-pin coil
- Chatter / unstable: air in system, high T-backpressure, worn pilot seat – bleed air first
Q7: Does T-port backpressure affect set pressure?
Yes – this model has internal pilot drain. Backpressure at T adds 1:1 to the relief setpoint. If your tank line has >5 bar sustained backpressure, consider the DBW…Y version (external pilot drain to separate tank line).
Q8: Fluid & seal compatibility?
NBR seals = mineral oil (HL/HLP) & HFC (water-glycol). For HEES/HETG biodegradable oils or HFD phosphate ester → specify FKM (Viton) seal variant. Maintain oil cleanliness per ISO 4406 code 18/16/13 or better.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
Location
Nan'an, Fujian Province, China
Contact Person
liyun