SD4 – Directional Control Valve OVERVIEW

SD4 series monoblock directional control valve is a single-spool integrated hydraulic valve, widely recognized as a direct interchange alternative to Walvoil SD4. Adopting compact monoblock casting structure, built-in main pressure relief valve, compatible with open-center and closed-center hydraulic circuits. It supports multiple control modes, stable operation, low internal leakage, ideal for small-to-medium mobile machinery hydraulic systems.

Features and Benefits

• Adopts compact monoblock structure to save installation space.

• Built-in adjustable main relief valve protects system against overload.

• Comes with 16mm interchangeable spool with various spool functions.

• Supports manual, cable, pneumatic and solenoid control options.

• Low internal leakage and smooth operation under continuous load.
  

• Robust cast iron body suits dusty and high-vibration working conditions.

• Comes with 16mm interchangeable spool with various spool functions.

• Wide temperature and viscosity range extends service life.

Specifications SD4 – Directional Control Valve

Applications

• This single-section monoblock directional valve is widely adopted for light-duty hydraulic equipment:

• Wood splitters

• Small dumpers

• Compact tractors

• Workshop hydraulic presses
  
  

Packaging & Delivery

SD4 – Directional Control Valve are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.

SD4 – Directional Control Valve FAQ:

1. What is the SD4 – Directional Control Valve ?

SD4 is a one-section monoblock hydraulic directional valve. Compact and cost-effective, it works for open-centre and closed-centre hydraulic systems. It accepts manual, remote cable, pneumatic or electric control, with a rated flow of 45 L/min and max pressure 250 bar. Typical applications include log splitters, small dumpers, compact tractors and workshop presses.

2. What makes the SD4 – Directional Control Valve ?

3. What is the working pressure range of SD4 – Directional Control Valve ?

The maximum working pressure of the SD4 directional control valve is 250 bar (3600 psi). The maximum back pressure for the return port is limited to 25 bar.

4. Can SD4 – Directional Control Valve replace other brands?

7. How can I get a quotation quickly

Please provide the following details:

• Model or displacement

• Working pressure

• Speed

• Quantity
  We will reply within 12 hours with a competitive quotation.

  
  

Certifications & Quality Assurance

SD4 – Directional Control Valve are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.

FAQ

1.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.

2.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.

3.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.

4.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.