1. Product Overview
1.1 Product Description
The ZZVP Self-Operated Micro-Pressure Control Valve is designed for automatic regulation of low-pressure and micro-pressure gas, steam and low-viscosity liquid systems.
The valve adopts a balanced regulating structure and uses process pressure to achieve automatic control. The required pressure setting can be adjusted according to operating conditions, making it suitable for applications where stable low-pressure regulation is required.
The ZZVP provides a practical solution for industrial systems that require sensitive pressure control with a simple regulating arrangement.
1.2 Customer Value
For customers, the main benefit of the ZZVP is its ability to maintain relatively stable micro-pressure conditions while reducing the need for continuous manual adjustment.
This can help improve process stability, simplify the pressure-control arrangement and provide more consistent operating conditions for equipment that is sensitive to small pressure changes.
2. Product Features
2.1 Micro-Pressure Regulation
The ZZVP is specifically designed for low-pressure and micro-pressure applications.
Its available setting ranges cover approximately 0.5 kPa to 100 kPa, allowing different regulating ranges to be selected according to actual process requirements.
2.2 Self-Operated Control
The regulating action is achieved through the process medium and mechanical regulating mechanism.
This makes the valve suitable for applications requiring automatic pressure adjustment without a complex external control arrangement.
2.3 Adjustable Pressure Setting
The required pressure value can be adjusted during operation.
This allows the valve to be matched more closely to actual process requirements and provides greater flexibility when operating conditions change.
2.4 Balanced Valve Structure
The valve uses a balanced regulating structure to reduce the influence of process pressure on valve movement.
This helps improve regulating stability, particularly in low-pressure applications.
2.5 Multiple Sealing Options
The ZZVP supports both hard-seat and soft-seat configurations.
Different sealing arrangements can therefore be selected according to leakage requirements and actual process conditions.
3. Working Principle
3.1 Pressure Detection
The controlled process pressure acts on the sensing mechanism of the valve.
When the pressure changes, the regulating mechanism responds to the difference between the actual pressure and the preset value.
3.2 Automatic Valve Adjustment
The valve plug automatically changes position according to the pressure variation.
This changes the effective flow area and therefore regulates the amount of medium passing through the valve.
3.3 Pressure Stabilization
The valve continuously adjusts its opening until the controlled pressure approaches the required setting.
This automatic regulation is especially useful in systems where even relatively small pressure fluctuations may affect process performance.
4. Technical Parameters
4.1 Basic Specifications
| Parameter | Specification |
|---|---|
| Product Model | ZZVP |
| Product Type | Self-Operated Micro-Pressure Control Valve |
| Nominal Size | DN15–DN150 |
| Flow Coefficient Kv | 7–760 |
| Pressure Setting Range | Approx. 0.5–100 kPa |
| Minimum Pressure Differential | ≥0.01 MPa |
| Operating Temperature | ≤80°C |
| Applicable Media | Gas, Steam, Low-Viscosity Liquid |
| Valve Structure | Single-Seat / Sleeve Type |
| Flow Characteristic | Linear |
| Control Accuracy | ≤10% |
| Packing | PTFE / Flexible Graphite |
These are the main technical specifications provided for the ZZVP series.
4.2 Pressure Setting Ranges
Available setting ranges include:
0.5–6, 5–10, 9–15, 12–19, 18–25, 22–30, 28–35, 32–40, 38–50, 48–60, 58–72 and 70–100 kPa.
The correct setting range should be selected according to the required controlled pressure.
4.3 Flow Capacity
The available rated Kv values include:
7, 11, 20, 30, 48, 75, 120, 190, 300, 480 and 760.
Correct valve sizing should be based on actual flow rate, pressure conditions and process medium.
5. Typical Applications
5.1 Industrial Furnace Combustion Systems
The ZZVP can be used in industrial furnace combustion systems where low-pressure gas regulation is required.
It is suitable for applications involving control of mixed fuel gases and other low-pressure gas conditions.
5.2 Generator Sealing Systems
The valve can be applied in hydrogen-cooled generator sealing oil systems where stable low-pressure regulation is required.
5.3 Storage Tank Protective Gas Control
The ZZVP can be used for automatic micro-pressure regulation of protective gas in oil and product storage tanks.
Maintaining stable protective gas pressure can help provide more consistent tank operating conditions.
5.4 Gas Pressure Regulation
The valve is also suitable for various industrial gas systems requiring automatic low-pressure or micro-pressure regulation.
6. Operational Advantages
6.1 More Stable Micro-Pressure Conditions
Automatic regulation helps reduce pressure fluctuations and maintain the controlled pressure closer to the required setting.
6.2 Reduced Manual Adjustment
Once the required pressure range has been set, the valve automatically responds to pressure changes during normal operation.
This reduces the need for frequent operator intervention.
6.3 Better Support for Pressure-Sensitive Equipment
Equipment and processes operating at low pressure can be sensitive to relatively small pressure variations.
The ZZVP helps provide more consistent pressure conditions, supporting stable process operation.
6.4 Flexible Application
With different nominal sizes, Kv values, pressure-setting ranges and sealing configurations, the ZZVP can be selected for a variety of micro-pressure applications.
