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Pressure Relief Valve Rexroth Interchangeable

Pressure Relief Valves DB.K

MANUFACTURER Genuine Huade Hydraulic
STANDARDS ISO 4401 / DIN 24340
AVAILABILITY Factory Direct Stock
Pressure Relief Valves DB.K
TECHNICAL REPLACEMENT NOTICE

This Huade® directional control valve serves as a 100% direct drop-in replacement for Bosch Rexroth PRESSURE-RELIEF-VALVES-DB-K equivalents. Dimensions, mounting interfaces, and technical parameters are identical. Designed for cost reduction in industrial and mobile hydraulic systems.

• Product features: Pilot-operated cartridge design, Rexroth-compatible, 4 pressure ranges with multiple adjustment options
• Specifications: Nominal sizes 6/10/20, up to 31.5 MPa operating pressure, flow rates up to 300 L/min
• Applications: Construction machinery, marine hydraulic systems, industrial pressure limiting applications

Request B2B Quote

Submit your target quantity and technical questions. Our hydraulic engineering team will provide a factory-direct quote and lead time estimate within 24 hours.

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💬 WhatsApp: +86-18217786775
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100% Genuine Huade Direct factory authorized supply
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ISO 4401 Mounting ISO 4401 / Rexroth interchangeable
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Secure Packaging Sealed rust-proof global shipping

Technical Data Sheet

  • Product Overview
  • Features & Applications
  • Technical Parameters

Product Overview

Through introducing Rexroth's advanced technology, Huade Hydraulic has made significant progress in the design, manufacturing of hydraulic components and integrated equipment. Huade® pressure relief valves DB.K are more durable compared with other similar products. They can replace the products offered by Rexroth in the same series. In order to provide affordable products, the factory pays more attention to practicality while introducing more than 750 advanced production equipment from all over the world to ensure the quality. The factory has passed ISO9001, ISO14001 and OH SAS18001. Huade® hydraulic pressure valves have won wide market recognition. Due to reliable quality and stable performance, they are widely used in various industrial environment such as the construction machinery and marine hydraulic system.

Mineral oil (for NBR seal),or phosphate ester (for FPM seal)

Maximum permissible degree of contamination of the fluid is to NAS 1638. class 9

up to 5、up to 10、up to 20、up to 31.5

Key Features

  • Cartridge valve
  • 4 pressure ranges
  • 4 adjustment elements
  • Rotary knob
  • Sleeve with hexagon and protective cap
  • Lockable rotary knob with scale
  • Rotary knob with scale

Industrial Applications

  • Pressure relief valves type DB..K.. are pilot operated pressure relief valves for installation in cartridge. They are used to limit the pressure in a hydraulic system.
  • Setting of the system pressure is via adjustment element (4). At rest, the valves are closed. Pressure in port A acts on the spool (1). At the same time, pressure is passed through orifice (2) on to the spring loaded side of the spool(1) and through orifice (3) to the pilot poppet(6). If the pressure
  • in port Arises above the value set at spring (5), the pilot poppet (6) opens. Fluid can now flow from the spring loaded side of spool (1), orifice (3), and channel (8) into port Y. The resulting pressure drop moves spool(1) causing this to open the connection from A to B, while the pressure set at spring (5) is maintained.
  • Pilot oil return from the two spring chambers is taken externally via port Y.
  • structure of DB 10 K2-40B
  • Symbol 
  • The fluid must be filtered. Minimum filter fineness is 20 ㎛.
  • The tank must be sealing up and an air filter must be installed on air entrance.
  • Products without subplate when leaving factory, if need them, please ordering specially.
  • Valve fixing screws must be high intensity level (class 10.9). Please select and use,them according to the parameter listed in the sample book.
  • Roughness of surface linked with the valve is required surface roughness is 0.8.
  • Surface finish of mating piece is required to 0.01/100mm.

Technical Parameters

Mechanical ratings and operating limits for the Pressure Relief Valves DB.K:

Parameter / Dimension Name Value / Rating Specification
Nominal size - 6 - 10 20
Pressure fluid - Mineral oil (for NBR seal),or phosphate ester (for FPM seal) Mineral oil (for NBR seal),or phosphate ester (for FPM seal)
Pressure fluid -temperature range(℃) - -30～+80 -30～+80
Viscosity range  (mm ²/s) - 10 to 800 10 to 800
Degree of fluid contamination - Maximum permissible degree of contamination of the fluid is to NAS 1638. class 9 Maximum permissible degree of contamination of the fluid is to NAS 1638. class 9
Operating pressure, max. (MPa) - up to 31.5 up to 31.5
Pressure adjustable, max (MPa) - up to 5、up to 10、up to 20、up to 31.5 up to 5、up to 10、up to 20、up to 31.5
Flow, max (L/min) - up to 60 - up to 100 up to 300
Weight (Kg) - approx.0.15 - approx.0.2 approx.0.35

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