Huade Hydraulic Valve DBW20B-1-50B/3156CG24N9Z5L

Model decoding
In Ward's naming convention, each part of this model represents the specific characteristics of the valve:
DB: This is the basic series code for valves. Usually, "DB" represents a pilot operated proportional relief valve. This is a high-performance valve that continuously adjusts system pressure (or remotely controls pressure) through electrical signals (current).
W: The installation and connection method of the representative valve is "plate connection". This is the most common form of connection, with oil ports on the valve body that are fixed to the plane in contact with the manifold block (valve block) by screws.
20: The diameter specification of the representative valve. Usually refers to the size of the main oil circuit interface of the valve, for example, the oil port thread is M27x2 or G1 ". This size determines the flow capacity of the valve.
B1: This is a design code or serial number. It represents specific details such as the internal structure design, spring parameters, and control characteristic curve of the valve. The numbers after different "B" may correspond to different pressure regulation ranges, electrical interfaces, or performance optimizations.
50: Usually represents the nominal pressure rating. 50 indicates that the rated working pressure of the valve is 50 MPa (500 bar). This is a very high pressure rating, indicating that it is suitable for heavy-duty, high-pressure hydraulic systems.
B: Usually represents the oil leakage method of the spring chamber. B "usually means" leakage ", which means that the control oil in the spring chamber needs to be separately connected and returned to the oil tank. This is crucial for ensuring the control accuracy and stability of the valve, especially in high-pressure or complex control circuits.
Product Overview and Features
The Huade DBW pilot operated proportional relief valve is the core pressure control component in electro-hydraulic proportional control.
Working principle: It consists of a pilot stage (a small proportional solenoid driven cone valve) and a main valve stage (slide valve or cone valve). The input electrical signal (such as 4-20mA or 0-10V) controls the thrust of the proportional solenoid, thereby changing the pressure of the pilot stage. This pressure is amplified by hydraulic pressure to push the main valve core, ultimately achieving precise and continuous proportional control of the system's main oil circuit pressure.
Core features:
Electric proportional stepless voltage regulation: replaces the traditional manual multi-level voltage regulation circuit, simplifies the system, and realizes automated pressure control.
High pressure and high flow: The DBW20B1-50B specification is particularly suitable for harsh working conditions that require high pressure (50MPa) and high flow, such as large presses, injection molding machines, metallurgical equipment, engineering machinery (such as cranes, rotary drills), etc.
Fast response and high control accuracy: The proportional electromagnet and pilot control structure make it have good dynamic response and steady-state accuracy.
Equipped with displacement sensor (optional): High end models may have built-in valve core displacement feedback (LVDT) to form closed-loop control, further improving control accuracy and anti-interference ability.

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