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Differential Pressure Control Valve New Type
**Differential Pressure Control Valve – New Type**
**Model No.:** DN40 to DN1000
**Hydraulic Control Valve:** Pressure Relief Valve
**Valve Type:** Differential Pressure Control Valve (New Generation)
**Trademark:** Judibode
**Transport Package:** Wooden Crate
**Specification:** DN40 to DN1000
**Origin:** China
**HS Code:** 8481804090
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**Product Introduction**
The Differential Pressure Control Valve is a newly designed and manufactured product based on advanced technologies from the United States, France, and China. It operates hydraulically with automatic control, featuring a streamlined body that minimizes internal head loss. This valve is versatile, functioning both as a pressure relief valve and a pressure sustaining valve.
As a pressure relief valve, it releases excess pressure when the pilot valve’s set point is exceeded, maintaining safe pipeline pressure and preventing damage caused by sudden pressure surges. It is commonly used in high-rise building fire testing systems and other water supply systems to ensure safety. As a pressure sustaining valve, it maintains the upstream pressure of the main valve above a certain threshold, ensuring consistent water supply and avoiding unnecessary decompression. This makes it an ideal choice for water supply systems.
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**Structure**
The valve consists of the main valve, pilot valve, needle valve, ball valve, and pressure gauge. These components are connected via piping, forming a pipe control system. The key parts include:
1. Needle Valve
2. Pilot Valve
3. Flow Regulator
4. Ball Valve
This design ensures efficient and precise control over the system.
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**Main Specifications**
| **Parameter** | **1.0MPa** | **1.6MPa** | **2.5MPa** |
|-----------------------|------------|------------|------------|
| Shell Test Pressure | 1.5MPa | 2.4MPa | 3.75MPa |
| Seal Test Pressure | 1.1MPa | 1.76MPa | 2.75MPa |
| Blow Down | ≤0.1MPa | - | - |
| Operating Temperature | 0–80°C | - | - |
| Medium | Water | - | - |
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**Working Principle and Purpose**
**As a Pressure Relief Valve:**
The main valve is installed in the drain bypass and connected in parallel with the main line. When the upstream pressure exceeds the pilot valve’s set value, the main valve opens to release pressure, reducing it to a safe level. This prevents water hammer and ensures pipeline safety. It is commonly used in fire hydrant systems, automatic sprinklers, and pump outlets where excessive pressure may occur due to high flow rates.
**As a Pressure Sustaining Valve:**
The main valve is installed in series on the main pipe. If the upstream pressure drops below the pilot valve’s set point, the main valve closes. When the pressure rises above the set value, the valve opens, allowing water to flow downstream and maintaining the required upstream pressure. This is especially useful in fire protection systems to avoid pressure drop during pumping.
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**Installation and Adjustment**
1. The optimal installation is horizontal with the pump cover facing upward. Other orientations can also be used, but ensure all debris is removed from the pipeline before installation. Pay attention to the flow direction arrow on the valve body. After installation, make sure there is no stress on the valve or internal components.
2. A gate valve and filter should be installed before the main valve, and another gate valve should be placed after for maintenance purposes.
3. Ensure the pipeline is clean, the needle valve is open, the ball valve is closed, and all balancing valves are fully open. To adjust pressure, loosen the lock nut under the pilot valve wheel, rotate it clockwise to increase pressure, and counterclockwise to decrease. Lock the nut after adjustment.
4. Thoroughly flush the pipeline before filling it with water.
5. Regularly clean the micro filter to maintain system efficiency.
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**Installation Diagram of 500X Pressure Relief Valve**
1. Tank
2. Strainer
3. Flexible Joint
4. Pump
5. 500X Pressure Relief Valve
6. Silent Check Valve
7. Resilient Seated Gate Valve
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**Available Types**
We offer three types of the main valve:
- Angle Type
- Full Bore Type
- Reduced Bore Type
This range allows for flexible integration into various piping systems, depending on the application requirements.