Rexroth Type Proportional Pressure Relief Valve DBETX 1X Direct Operated

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• ▶ Spring-Force Fail-Safe: Rexroth's Hardware-Layer Pressure Cap
  The Rexroth DBETX incorporates a mechanical pressure limitation that operates independently of control electronics. If a fault causes solenoid current to exceed Imax uncontrollably, the main spring force physically prevents pressure from rising beyond the pressure stage's mechanical ceiling - 55 bar for the 50-bar rating, 325 bar for the 315-bar rating. An additional auxiliary spring between cone and seat further contributes to stability and maintains minimal residual pressure at zero flow. This dual-spring architecture makes the Rexroth DBETX suitable for unattended or remote installations where electronic fault detection cannot be guaranteed, such as subsea control modules and offshore hydraulic power units.

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  ▶ Dual Solenoid Current Architecture
  The Rexroth DBETX offers two solenoid versions: a 0.8 A low-current variant drawing 25 VA and a 2.5 A high-current variant drawing 30 VA. The 0.8 A option minimizes heat generation and power supply load in battery-powered or solar-driven hydraulic systems, while the 2.5 A option provides higher force margin for faster dynamic response or operation at elevated ambient temperatures where coil resistance increases. Both versions share identical Rexroth valve body, cone, and seat geometry - the selection affects only the solenoid coil and amplifier, allowing field upgrade without mechanical disassembly of the valve.

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  ▶ 1 L/min Ultra-Low-Flow Pilot Stage
  At 1 L/min nominal flow - half the Rexroth DBET 6X's 2 L/min rating - the DBETX occupies an even more specialized niche as a precision pilot-stage pressure controller. This ultra-low flow characteristic suits applications where the valve sets reference pressure for a main-stage Rexroth relief valve (DB or DBW) or regulates pilot supply to a Rexroth servo valve, and any excess flow through the pilot line represents wasted energy. The conical seat design with auxiliary spring ensures pressure stability at flows as close to constant as possible, minimizing pressure ripple in sensitive measurement and test circuits where the DBETX serves as a precision pressure reference.

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  ▶ 60 ms On-Response: 25% Faster Than Rexroth DBET
  The Rexroth DBETX achieves a 100% signal-change response time of 60 ms (On) and 70 ms (Off) - a 25% improvement over the Rexroth DBET 6X's 80 ms in both directions. This faster transient response benefits cyclic applications such as injection molding hold-pressure transitions, press tonnage stepping, and synchronized multi-axis clamping where pilot pressure must track rapidly changing command profiles. Combined with the manual auxiliary override (N in the ordering code), operators can manually override the Rexroth solenoid-set pressure during commissioning or emergency shutdown without disconnecting electrical power.

   

▶ Are all four Rexroth DBETX pressure ratings available from stock?
The 50, 180, 250, and 315 bar configurations with 0.8 A solenoid are our standard stocking items. For the 80 bar rating or the 2.5 A solenoid variant, lead time is typically 2–3 weeks. Contact us for current Rexroth inventory and quantity discounts.

▶ What payment methods are supported for Rexroth products?
We accept T/T with 30% deposit and balance before shipment, L/C for qualified buyers, Western Union, and Alibaba Trade Assurance for secure online transactions.

▶ Can the Rexroth DBETX directly replace a Rexroth DBET?
Not directly. The DBETX uses ISO 4401-03-02-0-94 mounting pattern while the DBET uses ISO 4401-03-02-0-05. Subplate and manifold modifications may be required. We can provide compatible Rexroth subplates per RE 45053 - please inquire.

▶ When should I choose the Rexroth DBETX over the Rexroth DBET?
Choose the DBETX when: (1) mechanical fail-safe pressure limitation is mandatory, (2) flow through the valve must be minimized to ≤1 L/min for energy efficiency, (3) faster response time (60 ms vs 80 ms) is needed, or (4) manual auxiliary override is required for commissioning. Choose the Rexroth DBET/DBETE when you need higher pressure (up to 420 bar), integrated OBE electronics, or tighter manufacturing tolerance (±5% vs ±10%).

▶ What external amplifier do I need for the Rexroth DBETX?
The DBETX requires a Rexroth external amplifier ordered separately. Three formats are available: plug-in amplifier VT-SSPA1 (RE 30264), module amplifier VT-MSPA1 (RE 30222), or Europe card amplifier VT-VSPA1 (RE 30109). Each format offers versions for both the 0.8 A and 2.5 A solenoid. The amplifier provides ramp adjustment, sensitivity calibration, and zero-point offset - all configurable via onboard potentiometers.