REXROTH Proportional Directional Valve with Direct-Operated Design and Spring-Centered Spool for Proportional Flow Control

4WRA6EA05-1X/24NZ4/M
4WRA6E20-1X/24Z4/V
4WRA6E20-1X/24NZ4/V
4WRA6E20-1X/24NJ/M
4WRA6EA20-1X/24NZ4/V Rexroth Germany original proportional directional valve hydraulic system hydraulic valve

FAQ:

Frequently Asked Questions (FAQ) for Proportional Directional Valve Series 4WRA6

1. What is the 4WRA6 valve?

The 4WRA6 is a series of direct-operated proportional directional valves manufactured by REXROTH. It is designed as a subplate-mounted component and is typically used to control both the direction and flow rate of hydraulic fluid in a system, thereby managing the direction and speed of hydraulic actuators .

2. What are the main features of the 4WRA6 series?

• Direct-Operated Design: The valve spool is moved directly by proportional solenoids without the need for a pilot pressure stage .

• Spring-Centered Spool: When the solenoids are de-energized, the spool returns to and is maintained in the center position by compression springs .

• Mounting: Subplate mounting with porting interface according to ISO 4401 .

• Two Configurations: Available with external control electronics (4WRA type) or with integrated onboard electronics (OBE) (4WRAE type) .

• Flow Control: Provides proportional flow control with a progressive flow characteristic (metering notch) in addition to direction control .

3. What is the difference between 4WRA and 4WRAE?

The key difference lies in the location of the control electronics.

• 4WRA: Requires an external, separate amplifier to function. The amplifier processes the input signal (e.g., from a PLC) and provides the necessary power to the valve's solenoids .

• 4WRAE: Features Integrated OnBoard Electronics (OBE). The control electronics are built into the valve, allowing it to accept standard analog input signals (e.g., ±10 V or 4-20 mA) directly .

4. How do I read the model number? A typical 4WRA6 model code is structured as follows :

• 4WRA: Series designation for proportional directional valve without OBE. "E" after WRA (4WRAE) indicates integrated electronics.

• 6: Nominal size (06). Alternative size is 10.

• W / E / etc.: Spool symbol/type (e.g., W, E, EA), which defines the flow characteristics and center position condition .

• 07 / 15 / 30: Nominal flow rate in liters per minute at a pressure drop (Δp) of 10 bar. For size 06, common values are 7, 15, or 26/30 L/min .

• 2X: Component series (20-29).

• G24: Supply voltage (24 V DC).

• K4 / K31: Electrical connection type (e.g., without plug, with specific component socket) .

• V: Seal material (e.g., FKM for mineral oil) .

• A1 / F1 (for 4WRAE): Control value input type (A1 for ±10V, F1 for 4-20mA) .

5. What are the key technical specifications?

• Maximum Operating Pressure: Up to 350 bar for P, A, B ports .

• Maximum Flow: Varies with model (e.g., 42 L/min for some 4WRAE6 models) .

• Recommended Fluid Cleanliness: ISO 4406 20/18/15 .

• Voltage: Typically 24 V DC .

Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and channels. Main focus: quality assurance! The price is the lowest in the industry! Quality management procedures are implemented in accordance with international standards and are implemented throughout the production process. In terms of channels, we have gathered the most complete variety of products in the world; in terms of quality, all products meet international standards; the lowest price in the industry is the highest; the fastest delivery on credit, and a complete after-sales system; remember Good service is the key to cooperation with customers. We strive to achieve high quality standards, provide competitive prices, and ensure timely delivery. In this way, our products have been recognized by the market and satisfied by customers in the past years. Our goal is to meet the needs of our global customers. Here you can enjoy a one-stop shopping experience, the customer is God, you want all of us, I wish you a happy shopping trip.