Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of dbw30b pilot operated solenoid relief valve in China, also supports customized service. If you're going to wholesale high quality dbw30b pilot operated solenoid relief valve made in China, welcome to get pricelist from our factory.
Product Overview
The DBW30B hydraulic valve is a pilot-operated solenoid relief valve. It works exactly like the DBW10B shown in our product picture – but with larger flow capacity (up to 650 L/min).
This valve has three main parts: a pilot relief stage, a main spool, and a small NG6 solenoid valve on top. When the solenoid is energized, the system builds pressure. When de-energized, the pump flow returns to tank at low pressure (unloading function). Simple, reliable, no electronic controllers needed.
Key Specifications (Test Bench Data)
|
Parameter |
Valve |
|
Max pressure |
350 bar |
|
Flow capacity (NG30) |
650 L/min |
|
Pressure adjustment range |
15 – 350 bar (manual screw) |
|
Internal leakage (pilot) |
≤30 ml/min @350 bar |
|
Unloading pressure drop |
≤6 bar |
|
Solenoid coil |
24V DC (IP65), manual override |
|
Seals |
FKM (Viton®) |
Design & Material – No Shortcuts
We do not use cheap seals. FKM (Viton®) comes standard. It works with mineral oil, water-glycol, and phosphate ester fluids.
Main spool
20CrMo steel, nitrided surface (HRC 55-60) – resists wear in dirty oil.
Pilot seat
Induction-hardened steel – holds pressure setting longer.
Solenoid connector
DIN 43650 standard – easy replacement.
Services We Offer
Bulk order discounts and flexible shipping terms
01
1-year quality guarantee covering manufacturer defects
02
Fast sample delivery for testing and validation
03
OEM and custom labeling options
04
Technical support for proper valve sizing, installation, and troubleshooting
05
faq
Q:1.Is this valve fully interchangeable with the original Rexroth model DBW30B?
A: Yes. The valve is designed for complete interchangeability with the original Rexroth model DBW30B pilot operated solenoid relief valve. Porting patterns conform to ISO 6264 and DIN 24340 form E standards, allowing direct bolt-on replacement without any modification to the subplate or piping. The adjustment types and solenoid configurations maintain the same dimensions and operating characteristics. However, we always recommend customers test a sample unit in their specific system before full deployment to verify compatibility with existing control logic and fluid conditions.
Q:2.What are the differences between DB and DBW series valves?
A: The DB series functions solely as a pilot-operated pressure relief valve for pressure limitation, whereas the DBW series integrates a directional spool valve mounted on the pilot control valve-allowing the system pressure to be both limited and solenoid-actuated unloaded. When the solenoid valve is energized, the pilot stage opens the main spool, enabling the pump flow to return to the tank at near-zero back pressure, which reduces energy consumption and heat generation. The DBW30B is therefore the appropriate choice for applications requiring intermittent unloading or multi-stage pressure control.
Ready to Optimize Your Hydraulic System?
Complete the inquiry form below or contact our sales team directly to request a quote, sample, or technical datasheet. Bulk order pricing and volume discounts available upon request.
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