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China factory - Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.

Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.

  • China ,Fujian
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  2. Rexroth Hydraulic Valve>
  3. R900916161 DBW20A2-5X/350-6EG24N9K4 Rexroth Germany Electromagnetic Relief Valve
China R900916161 DBW20A2-5X/350-6EG24N9K4 Rexroth Germany Electromagnetic Relief Valve
China R900916161 DBW20A2-5X/350-6EG24N9K4 Rexroth Germany Electromagnetic Relief Valve

  1. China R900916161 DBW20A2-5X/350-6EG24N9K4 Rexroth Germany Electromagnetic Relief Valve

R900916161 DBW20A2-5X/350-6EG24N9K4 Rexroth Germany Electromagnetic Relief Valve

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Viscosity Range 10–800 mm²/s
Weight (approx.) 8.05 kg
Solenoid Type Wet-pin DC solenoid
Payment Terms Western Union,T/T,D/P,D/A,L/C
Fluid Temperature Range -30 °C to +80 °C (NBR seals)
Delivery Time 2 weeks
Supply Ability 100
Packaging Details wooden box
Solenoid Voltage 24 V DC (G24)
Brand Name Rexroth
Model Number R900916161 DBW20A2-5X/350-6EG24N9K4
Certification ISO
Place of Origin Germany

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  1. Product Details
  2. Company Details

Product Specification

Viscosity Range 10–800 mm²/s Weight (approx.) 8.05 kg
Solenoid Type Wet-pin DC solenoid Payment Terms Western Union,T/T,D/P,D/A,L/C
Fluid Temperature Range -30 °C to +80 °C (NBR seals) Delivery Time 2 weeks
Supply Ability 100 Packaging Details wooden box
Solenoid Voltage 24 V DC (G24) Brand Name Rexroth
Model Number R900916161 DBW20A2-5X/350-6EG24N9K4 Certification ISO
Place of Origin Germany
High Light Rexroth electromagnetic relief valve ，DBW20A2-5X hydraulic valve ，Rexroth Germany relief valve
R900916161 DBW20A2-5X/350-6EG24N9K4 Rexroth Germany Electromagnetic Relief Valve
Product Overview

Pilot-operated pressure relief valve with integrated solenoid unloading function. Designed for precise pressure control and system unloading in industrial hydraulic applications.

Technical Specifications
Part Number R900916161
Model DBW 20 - A2 - 5X / 350 - 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 A2 = Rotary hand knob with protective cap (hand-adjustable, no tool needed)
Component Series 5X (series 50-59, dimensionally interchangeable)
Max. Adjustable Relief Pressure 350 bar (adjustment range typically 5-350 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.) 8.05 kg
Body Material Cast iron / steel, zinc-plated
Rexroth DBW20A2 electromagnetic relief valve product image
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Frequently Asked Questions
What is the difference between DBW20A1 and DBW20A2?
Functionally identical. Only the adjustment method differs:
  • A1 = hexagon socket setscrew (Allen key)
  • A2 = rotary hand knob (turn by hand under cap, no tool)
Both share the same pressure stages, flow ratings, solenoid specs, and NG20 mounting.
Is this direct-acting or pilot-operated?
It is a pilot-operated (two-stage) relief valve with solenoid unloading. A pilot stage controls the main spool for stable high-flow relief; the integrated solenoid can command the valve to dump system pressure to tank.
How do I adjust the relief pressure?
With system depressurized, lift/remove the protective cap and turn the rotary knob clockwise to increase, counterclockwise to decrease. Factory preset is typically near minimum of the spring range. Replace the cap after setting and verify with a pressure gauge. The solenoid does NOT alter the set pressure.
What is the solenoid logic?
Standard: Solenoid DE-energized = relief active at set pressure. Solenoid ENERGIZED = system unloaded (P connected to T, near tank pressure). Confirm this matches your control logic before wiring.
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
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 /350), 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
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).
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

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...

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Get in touch with us

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  • Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
  • Nan'an, Fujian Province, China
  • https://www.electrichydpump.com/

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