DBETBX-1X/28G24-37Z4M Rexroth Proportional Relief Valve

Product Overview:

The DBETBX-1X/28G24-37Z4M is a high-performance direct-operated solenoid proportional relief valve engineered for hydraulic systems requiring precise pressure modulation. As a leading manufacturer of premium high-pressure hydraulic components, we designed this valve for 100% drop-in interchangeability with the original Bosch Rexroth DBET family series (covering DBETX, DBETE, DBETR, DBETBEX, etc.). Our core commitment is reliability: every single unit undergoes a rigorous 100% simulated working condition test before shipping. This guarantees that its pressure response, hysteresis, and flow control match or exceed OEM standards under extreme environments. This valve not only slashes your procurement and downtime costs but also delivers rock-solid stability to your hydraulic infrastructure.

Technical Specifications:

• Model Number: DBETBX-1X/28G24-37Z4M

• Brand Compatibility: 100% Interchangeable with Bosch Rexroth

• Mounting Standard: NG6 / CETOP 3 (ISO 4401-03-02-0-05)

• Valve Type: Direct-operated proportional pressure relief valve (pilot stage)

• Max Operating Pressure: 315 bar (~4600 psi)

• Max Flow Rate: 1.5 L/min

• Supply Voltage: 24V DC (G24)

• Electrical Connection: Z4M plug-in connector (DIN EN 175301-803)

• Control Type: Analog Solenoid Proportional Control

• Protection Class: IP 65 (with properly mated connector)

• Fluid Temperature Range: -20°C to +80°C

• Weight: Approx. 1.5 kg

Key Technical Advantages:

• Absolute Interchangeability: Engineered strictly according to the Rexroth 1X series footprint and porting patterns. Users can achieve plug-and-play seamless replacement without modifying any subplates or pipework.

• Exceptional Dynamic Response & Low Hysteresis: Driven by a highly precise wet-pin proportional solenoid, the spool undergoes micron-level precision grinding to minimize friction. This ensures ultra-low hysteresis (≤ 2%) and outstanding repeatability (≤ 1%) during pressure adjustments.

• 100% Simulated Working Condition Testing: No batch sampling. Every valve is mounted on an actual hydraulic test bench and subjected to fatigue and pressure-holding tests at a full 315 bar load with high-temperature cycling fluid, guaranteeing zero internal leakage and zero sticking.

• Aerospace-Grade Materials & Extended Lifespan: The core spool is crafted from high-strength carburized hardened steel. The solenoid coil features exceptional heat dissipation and EMI resistance, guaranteeing a prolonged service life even in 24/7 high-frequency start-stop applications.

Application Areas:

Thanks to its superb pressure control accuracy, the DBETBX-1X series is widely utilized in:

• Clamping and injection pressure control in precision injection molding and die-casting machines.

• Hydraulic screw-down systems and rolling mill controls in heavy metallurgical equipment.

• Pilot pressure regulation in servo-hydraulic test stands and material fatigue testing machines.

• Precision micro-adjustment circuits in marine hydraulic winches and heavy construction machinery.

Expert Maintenance Tips:

• Fluid Cleanliness: Proportional valves are highly sensitive to contamination. Ensure system hydraulic fluid cleanliness is maintained at least at ISO 4406 18/16/13 (or NAS 1638 Class 7). We strongly recommend installing a 10 μm high-precision filter element upstream of the valve block.

• Air Bleeding on Initial Startup: After initial installation or oil replacement, run the system at low pressure and slightly loosen the bleed screw at the end of the proportional solenoid. Tighten it only when the oil flows out without any air bubbles. This prevents system judder and erratic pressure fluctuations.

• Electrical Matching: Before operation, verify that the corresponding proportional amplifier parameters (such as deadband compensation and dither frequency) are correctly tuned for the 24V DC coil resistance to prevent pressure crawling caused by unstable current.