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Differential Pressure Control Valve New Type
Differential Pressure Control Valve – New Type
Product Introduction
This valve is designed and manufactured by our company based on advanced technology from the United States, France, and China. It utilizes hydraulic operation and automatic control for efficient performance. The streamlined design of the valve body minimizes internal head loss, ensuring smooth flow and reduced energy consumption.
The main feature of this valve is its dual functionality as both a pressure relief valve and a pressure sustaining valve. As a pressure relief valve, it releases excess pressure beyond the pilot valve’s set value, maintaining safe pipeline pressure to prevent damage caused by high or sudden pressure surges. It is commonly used in fire protection systems, water supply systems, and other applications where excessive hydraulic pressure could pose a risk.
As a pressure sustaining valve, it maintains the upstream water pressure above a certain threshold, ensuring consistent and reliable water supply. This makes it ideal for use in fire systems, where maintaining minimum pressure is critical to system safety and efficiency.
2. Structure
The valve consists of the main valve, pilot valve, needle valve, ball valve, and pressure gauge. These components are connected via piping, forming what is known as the pipe control system. The system allows for precise control and monitoring of pressure levels.
Key components include:
1. Needle valve
2. Pilot valve
3. Flow regulator
4. Ball valve
3. Main Specifications
| Nominal Pressure PN | 1.0 MPa | 1.6 MPa | 2.5 MPa |
|---------------------|---------|---------|---------|
| Shell Test Pressure | 1.5 MPa | 2.4 MPa | 3.75 MPa |
| Seal Test Pressure | 1.1 MPa | 1.76 MPa | 2.75 MPa |
| Blow Down | ≤0.1 MPa | - | - |
| Applicable Temperature | 0–80°C | - | - |
| Applicable Medium | Water | - | - |
5. Working Principle and Purpose
As a pressure relief valve, the main valve is installed on the drain bypass and connected in parallel with the main line. When the upstream pressure exceeds the pilot valve’s set value (typically 20 bar), the main valve quickly opens to release pressure until the upstream pressure drops below the set point. This prevents water hammer and ensures pipeline safety. It is widely used in fire hydrant systems, sprinkler systems, and pump outlets where pressure fluctuations can occur.
As a pressure sustaining valve, the main valve is installed in series with the main line. If the upstream pressure falls below the pilot valve’s set value, the main valve closes; otherwise, it opens to maintain the required pressure downstream. This function is essential in fire systems, where maintaining a minimum pressure level is crucial for effective operation.
6. Installation and Adjustment
1. The optimal installation position for the main valve is horizontal with the pump cover facing upward. Other orientations are acceptable as long as the pipeline is free of debris before installation. Ensure the flow direction arrow on the valve body is correctly aligned. After installation, avoid any external stress on the valve or internal components.
2. Before the main valve, install a gate valve and a strainer. A second gate valve should also be placed after the main valve for maintenance purposes.
3. Ensure the pipeline is clean, the needle valve (No. 23) is open, the ball valve (No. 21) is closed, and all balance ball valves are fully open. To adjust the pressure, loosen the lock nut under the pilot valve wheel, then turn the wheel clockwise to increase pressure or counterclockwise to decrease it. Lock the nut after adjusting.
4. Thoroughly flush the pipeline before filling it with water.
5. Regularly clean the micro filter (No. 24) to ensure optimal performance.
Installation Diagram of 500X Pressure Relief Valve
1. Pool
2. Strainer
3. Flexible Joint
4. Pump
5. 500X Pressure Relief Valve
6. Silent Check Valve
7. Resilient Seated Gate Valve
For the main body, we offer three types:
- Angle type
- Full bore type
- Reduced bore type
This versatile and reliable differential pressure control valve is an ideal choice for modern water supply systems, offering superior performance, durability, and safety. Whether used as a pressure relief or pressure sustaining device, it ensures stable and efficient operation in a wide range of applications.