R900590334 DB10-2-5X/315 Original imported Rexroth overflow valve

FAQ:

Q1: What is the primary function of the Rexroth DB10-2-5X/315 valve?

A:​ It is a pilot-operated pressure relief valve. Its primary function is to limit the maximum pressure​ in a hydraulic system. It acts as a safety device by opening a flow path to the tank when the system pressure reaches its set value, thereby protecting components from damage due to overpressure.

Q2: What does the "315" in the model number signify?

A:​ The number "315" indicates the maximum adjustable pressure setting​ for this valve, which is 315 bar. This is the highest pressure that can be set on the valve's adjustment mechanism.

Q3: How is the pressure setting adjusted?

A:​ The pressure setting is typically adjusted via a screw mechanism​ on the valve. Turning the screw changes the spring preload, which in turn sets the cracking pressure at which the valve begins to open. The exact adjustment procedure (e.g., tool required) should be confirmed in the technical documentation.

Q4: Where is this valve typically installed in a hydraulic system?

A:​ It is typically installed in the main pressure line​ of the hydraulic system, often directly after the pump, to protect the entire system. It can also be used in branch circuits to limit pressure in specific sections.

Q5: What is the difference between a direct-acting and a pilot-operated relief valve like the DB10?

A:​ A direct-acting valve​ has a simple spool or poppet held closed by a spring; it opens directly when system pressure overcomes the spring force. It responds quickly but may have more pressure override. A pilot-operated valve​ (like the DB10) uses a two-stage design: a small pilot stage controls a larger main stage. This design provides more precise pressure control, less pressure override, and higher flow capacity​ for a given size, but may have a slightly slower response.

Q6: What are the key selection criteria for this valve?

A:​ Key criteria include:

• Required maximum system pressure​ (must be ≤ 315 bar).

• Maximum flow rate​ through the valve during relief.

• Port size and connection type​ (G1/4").

• Fluid compatibility.

• Required response time and pressure stability characteristics.

Q7: Where can I find the complete performance data (e.g., flow vs. pressure curve)?

A:​ You must obtain the official Rexroth technical datasheet for the exact model DB10-2-5X/315. This document provides the full performance characteristics, including the pressure-flow curve, internal leakage data, adjustment characteristics, and all necessary dimensions for installation.