DR Series Pilot Operated Pressure Reducing Hydraulic Valve

The DR series pilot-operated pressure-reducing hydraulic valve is a high-quality and reliable component designed to provide precise pressure control in hydraulic systems. With its innovative pilot-operated mechanism and exceptional performance, this valve accurately reduces hydraulic pressure to meet specific system requirements.

The DR series pilot-operated pressure-reducing hydraulic valve is a high-performance solution for precise pressure control in hydraulic systems. With its pilot-operated design, precise pressure control, wide pressure range, and high flow capacity, this valve ensures efficient and accurate pressure reduction while safeguarding system components. Following the recommended usage methods and maintenance practices, the DR series valve delivers reliable performance, extending the lifespan of hydraulic systems. Upgrade your hydraulic system with the dr series pilot-operated pressure-reducing hydraulic valve and experience optimal pressure control for enhanced system efficiency and productivity.

DR Series Pilot Operated Pressure Reducing Hydraulic Valve Key Characteristics:

• Pilot-Operated Design:
  • The DR series valve features a pilot-operated design, providing accurate, reliable, and stable pressure reduction in hydraulic systems.
  • It utilizes a separate control circuit, the pilot circuit, to regulate the main valve’s opening and control the pressure.
• Precise Pressure Control:
  • This valve offers exceptional precision in pressure control, allowing hydraulic systems to operate within desired pressure limits.
  • It maintains consistent pressure levels, preventing over-pressurization and protecting sensitive system components.
• Wide Pressure Range:
  • The DR series valve is available in various pressure ranges, making it suitable for various hydraulic applications.
  • It allows customization to match specific system requirements and optimize performance.
• High Flow Capacity:
  • This valve exhibits excellent flow capacity, enabling it to handle high flow rates without compromising pressure control accuracy.
  • It ensures efficient fluid regulation and uninterrupted system operation.

DR Series Pilot Operated Pressure Reducing Hydraulic Valve Parameter:

DR Series Pilot Operated Pressure Reducing Hydraulic Valve Advantages:

• Used for bottom sub-plate mounting
• Installation face follow DIN24340 D and ISO5781
• Used in oil path block installation
• Used in screw connection
• Five pressure ranges
• Two adjustment types: knob, adjustment screw with protection cap
• Optional one directional valve  ( only used for bottom sub-plate mounting )

Usage Method Of DR Series Pilot Operated Pressure Reducing Hydraulic Valve :

• System Analysis:
  • Conduct a comprehensive hydraulic system analysis to determine the specific pressure control requirements.
  • Consider maximum operating pressure, desired pressure range, and flow rates.
• Valve Selection:
  • Select the appropriate DR series valve variant based on the system’s pressure control specifications.
  • Consider pressure rating, flow capacity, and compatibility with other system components.
• Installation:
  • Follow the manufacturer’s instructions to correctly install the hydraulic system’s DR series pilot-operated pressure-reducing valve.
  • Ensure proper alignment and secure connections to prevent leaks and optimize performance.
• Calibration:
  • Calibrate the valve to set the desired downstream pressure.
  • Utilize pressure gauges or other measurement devices to adjust the valve’s pilot circuit accurately.

How Does A Hydraulic Relief Valve Work?

A hydraulic relief valve is a crucial component in hydraulic systems that protects the system from excessive pressure by diverting excess fluid flow back to the reservoir. It operates based on the principle of utilizing a spring-loaded mechanism to control the pressure level within the system. Let’s explore how a hydraulic relief valve works:

1. Valve Construction:
   • A hydraulic relief valve consists of a valve body, a spring-loaded poppet or spool, and an adjustable spring.
   • The valve body contains fluid ports for the inlet, outlet, and a drain or return line to the reservoir.
2. Pressure Setting:
   • The relief valve has an adjustable spring that determines the pressure at which the valve opens.
   • Adjusting the spring tension can set the pressure to open the valve and relieve excess stress.
3. System Pressure Monitoring:
   • As the hydraulic system operates, the pressure builds up due to factors such as pump output, load resistance, or temperature changes.
   • The relief valve continuously monitors the system pressure through its inlet port.
4. Pressure Threshold:
   • When the system pressure reaches or exceeds the set pressure threshold, a force is exerted on the poppet or spool against the spring tension.
5. Valve Opening:
   • Once the force exerted by the system pressure exceeds the spring tension, the relief valve opens.
   • This creates a path for excess fluid to flow from the system’s high-pressure side to the low-pressure side or directly back to the reservoir.
6. Pressure Equalization:
   • The relief valve diverts the excess fluid flow, allowing the pressure within the system to equalize and preventing over-pressurization.
   • This protects system components from potential damage and ensures safe operation.
7. Closing the Valve:
   • Once the pressure drops below the set threshold, the spring’s tension overcomes the force exerted by the system pressure.
   • The relief valve closes, blocking the fluid flow path and restoring the normal flow of hydraulic fluid through the system.
8. Continuous Monitoring:
   • The relief valve continuously monitors the system pressure, opening and closing as necessary to maintain pressure within the desired range.
   • This dynamic response ensures that the system operates safely and prevents pressure spikes or fluctuations.

Capability & Capacity Of Factory:

(1) Assembly

We have a first-class independent research and development assembly platform. The hydraulic cylinder production workshop has four semi-automatic lifting cylinder assembly lines and one automatic tilt cylinder assembly line, with a designed annual production capacity of 1 million pieces. The special cylinder workshop is equipped with various specifications of a semi-automatic cleaning assembly system with a designed annual production capacity of 200,000 and equipped with famous CNC machining equipment, a machining center, a high-precision cylinder processing special equipment, a robot welding machine, an automatic cleaning machine, automatic cylinder assembly machine, and automatic painting production line. Existing critical equipment of more than 300 sets (sets). The optimal allocation and efficient use of equipment resources ensure the accuracy requirements of products and meet the high-quality needs of products.

(2) Machining

The machining shop is equipped with a customized inclined rail turning center, machining center, high-speed honing machine, welding robot, and other related equipment, which can handle the processing of cylinder tubes with a maximum inner diameter of 400mm and a maximum length of 6 meters.

(3) Welding

(4) Painting & coating

With small and medium-sized cylinder automatic water-based paint coating lines, to achieve automatic robot loading and unloading and automatic spraying, the design capacity of 4000 pieces per shift;
We also have a semi-automatic paint production line for large cylinders powered by a power chain, with 60 cases per shift design capacity.

(5) Testing

We have first-class inspection facilities and test beds to ensure that the performance of the cylinder meets the requirements.

We are one of the best hydraulic cylinder manufacturers. We can offer comprehensive hydraulic cylinders. We also provide corresponding agricultural gearboxes. We have exported our products to clients worldwide and earned a good reputation because of our superior product quality and after-sales service. We welcome customers at home and abroad to contact us to negotiate business, exchange information, and cooperate with us!