Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
| Payment Terms | Western Union,T/T,D/P,D/A,L/C |
| Pilot Oil | Internal pilot supply, internal pilot drain (standard DBW) |
| Solenoid Type | Wet-pin DC solenoid |
| Weight (approx.) | 7.9 kg |
| Solenoid Voltage | 24 V DC (G24) |
| Packaging Details | wooden box |
| Max. Flow Rate (Qmax) | approx. 500 L/min (Size 20 DB/DBW series) |
| Supply Ability | 100 |
| Delivery Time | 2 weeks |
| Brand Name | Rexroth |
| Model Number | R900939736 DBW20A1-5X/315-6EG24N9K4 |
| Certification | ISO |
| Place of Origin | Germany |
View Detail Information
Explore similar products
R901411433 4WRPEH10C4B100L-3X/M/24A1 German Rexroth hydraulic proportional valve
R900549534 4WE6HA6X/EG24N9K4 Rexroth electromagnetic directional valve
R901507310 4WRPEH10C3B100L-3X/M/24F1 Proportional directional valve from Rexroth
R900553670 4WE6HB6X/EG24N9K4 Hydraulic directional valve solenoid valve Rexroth
Product Specification
| Payment Terms | Western Union,T/T,D/P,D/A,L/C | Pilot Oil | Internal pilot supply, internal pilot drain (standard DBW) |
| Solenoid Type | Wet-pin DC solenoid | Weight (approx.) | 7.9 kg |
| Solenoid Voltage | 24 V DC (G24) | Packaging Details | wooden box |
| Max. Flow Rate (Qmax) | approx. 500 L/min (Size 20 DB/DBW series) | Supply Ability | 100 |
| Delivery Time | 2 weeks | Brand Name | Rexroth |
| Model Number | R900939736 DBW20A1-5X/315-6EG24N9K4 | Certification | ISO |
| Place of Origin | Germany | ||
| High Light | Rexroth electromagnetic relief valve ，DBW20A1-5X hydraulic valve ，Rexroth Germany original valve | ||
|
Parameter |
Value |
|---|---|
|
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 |
| 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 |
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 (tor70–80 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.
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...
Get in touch with us
Leave a Message, we will call you back quickly!