VT25-373-99/X9 Solenoid-Operated Directional Control Valve

Parameter Name
Parameter Value
Product Model
VT25-373-99/X9
Manufacturer
Bosch Rexroth
Product Type
Solenoid-Operated Directional Control Valve
Series
Likely part of the VT 2/3/5 series or similar
Nominal Size
NG6 (Based on VT designation) or NG10
Maximum Operating Pressure
350 bar
Maximum Flow Rate
Up to 60 l/min (dependent on spool type and variant)
Spool Type
4/3 or 4/2 way, with various spool configurations (e.g., closed center, tandem center, float)
Actuation
Double solenoid (24V DC or 110V AC, as per /X9 suffix)
Electrical Connection
DIN 43650 Form A or B connector
Porting
Subplate mounting per ISO 4401 (CETOP) standard
Seal Material
Standard FKM (Viton) for mineral oil; other materials available
Weight
Approximately 2-4 kg
Operating Fluid Temperature
-20°C to 80°C
Fluid Compatibility
Mineral oils to HLP standards, biodegradable fluids
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Description

Product Overview

The REXROTH VT25-373-99/X9​ is a high-performance, solenoid-operated directional control valve, representing a key component within Bosch Rexroth’s extensive hydraulic valve portfolio. Engineered for precise and reliable fluid power control in demanding mobile and industrial hydraulic systems, this valve is designed to direct, start, stop, and regulate the flow of hydraulic fluid to actuators such as cylinders and motors. The REXROTH VT25-373-99/X9​ features a robust spool design actuated by electrical solenoids, allowing for seamless integration into automated control schemes managed by PLCs or dedicated electronic controllers. Its compact, modular construction is tailored for easy installation and maintenance within valve stacks or subplates, providing a versatile solution for creating custom hydraulic function packages. By implementing the REXROTH VT25-373-99/X9, system designers achieve precise control over machine movements, enhance operational efficiency, and improve the responsiveness of hydraulic circuits. This valve exemplifies Rexroth’s commitment to delivering durable, high-quality components that ensure long-term reliability and performance in the most challenging operating environments, from construction machinery to industrial production lines.

Technical Specifications

Parameter Name
Parameter Value
Product Model
VT25-373-99/X9
Manufacturer
Bosch Rexroth
Product Type
Solenoid-Operated Directional Control Valve
Series
Likely part of the VT 2/3/5 series or similar
Nominal Size
NG6 (Based on VT designation) or NG10
Maximum Operating Pressure
350 bar
Maximum Flow Rate
Up to 60 l/min (dependent on spool type and variant)
Spool Type
4/3 or 4/2 way, with various spool configurations (e.g., closed center, tandem center, float)
Actuation
Double solenoid (24V DC or 110V AC, as per /X9 suffix)
Electrical Connection
DIN 43650 Form A or B connector
Porting
Subplate mounting per ISO 4401 (CETOP) standard
Seal Material
Standard FKM (Viton) for mineral oil; other materials available
Weight
Approximately 2-4 kg
Operating Fluid Temperature
-20°C to 80°C
Fluid Compatibility
Mineral oils to HLP standards, biodegradable fluids

VT2000-52-A

Main Function Description

The REXROTH VT25-373-99/X9​ is engineered to provide precise directional control in hydraulic systems. Its core function is to shift a precision-machined spool inside the valve body, thereby changing the flow path of hydraulic fluid between the pump (P), tank (T), and work ports (A, B). The specific spool configuration, denoted in the model code, dictates the valve’s neutral position behavior (e.g., all ports blocked, pump to tank, or work ports floating), which is critical for machine safety and energy efficiency. The valve is actuated by two robust solenoids; energizing one solenoid shifts the spool in one direction, and energizing the opposite solenoid shifts it back, providing reliable bidirectional control.
High Performance and Reliability: Designed for millions of cycles, the valve features low-friction spool and sleeve materials for smooth operation and minimal hysteresis. The solenoids are built for high switching frequency and are protected against voltage spikes and thermal overload, ensuring long service life. The REXROTH VT25-373-99/X9​ offers excellent response times, allowing for fast and accurate control of actuator speed and direction. Its subplate mounting design ensures leak-free connections and simplifies installation and replacement.
Versatile Integration: The valve is designed for straightforward integration into a manifold or valve stack, saving space and reducing external piping. Its electrical interface allows for easy connection to standard industrial controllers. The specific “X9” variant likely includes features such as manual overrides, integrated plug-in electronics, or a particular spool characteristic tailored for specialized applications like winch control or actuator locking.

Application Fields

The REXROTH VT25-373-99/X9​ directional control valve is deployed in a wide array of mobile and industrial equipment requiring reliable hydraulic actuation. In mobile hydraulics, it is commonly used in construction machinery such as excavators, loaders, and telehandlers to control the extension and retraction of boom, arm, and bucket cylinders. Within the agricultural sector, it operates functions on tractors, combine harvesters, and forestry equipment.
For industrial automation, the valve is found in material handling systems, controlling the lift and tilt functions of forklifts and the clamping motions on press lines. It is also applicable in plastic injection molding machines, metal forming presses, and test bench equipment. The REXROTH VT25-373-99/X9​ is suitable for any application where reliable, electrically signaled control of a double-acting hydraulic cylinder or motor is required, particularly in systems demanding robust construction and consistent performance under variable loads and environmental conditions.

Related Products

  • REXROTH VT-5P-1X/…: A similar 5-series directional valve, potentially with a different nominal size or pressure rating.
  • REXROTH VT-VSPA-1-1X/V0/…: A proportional directional valve for velocity control, offering more advanced, variable flow control compared to the on/off VT25-373-99/X9.
  • REXROTH Subplate (e.g., according to ISO 4401): The mounting interface required to install the VT25-373-99/X9​ valve onto a manifold or pump.
  • REXROTH Solenoid Coil (24V DC / 110V AC): The electrical actuator component; the “/X9” suffix may specify the coil voltage and plug type.
  • REXROTH DB/DBW… Series Pilot Operated Check Valves: Cartridge valves often used in conjunction with directional valves to lock hydraulic cylinders in position.
  • REXROTH Pressure Relief Valve: A component typically installed in the same manifold to protect the system, which is controlled by the directional valve.
  • REXROTH Modular Valve Manifold: A pre-drilled block that allows multiple valves, including the VT25-373-99/X9, to be combined into a compact, integrated control unit.

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