ZZYP Self-Operated Pressure Regulating Valve
1. Product Overview
1.1 Product Description
The ZZYP Self-Operated Pressure Regulating Valve is designed for automatic pressure regulation in industrial gas, liquid and steam systems.
The valve uses the pressure of the process medium to actuate the regulating mechanism. As operating pressure changes, the valve automatically adjusts its opening to maintain the required upstream or downstream pressure within the selected setting range.
With sensitive response, reliable sealing and stable pressure regulation, the ZZYP series is suitable for process applications where continuous and dependable pressure control is required.
1.2 Customer Value
By automatically responding to pressure variations, the ZZYP valve helps maintain more stable pipeline conditions and reduces pressure fluctuations transmitted to process equipment.
For the user, this means a simpler pressure-control arrangement, reduced manual adjustment and more consistent operating conditions for downstream equipment and production processes.
2. Product Features
2.1 Self-Operated Pressure Regulation
The regulating action is driven by the process medium itself, allowing automatic pressure adjustment according to actual pipeline conditions.
This design is particularly suitable for applications requiring independent and continuous pressure regulation.
2.2 High Adjustment Accuracy
The pressure setting range is divided into multiple overlapping sections. This allows the appropriate regulating range to be selected according to actual process pressure and improves adjustment accuracy.
2.3 Continuous Pressure Setting
The pressure set point can be continuously adjusted during operation, making it easier to match changing process requirements.
2.4 Sensitive Response
A diaphragm sensing element is used for pressure detection. Its high sensing sensitivity allows the actuator to respond quickly to changes in process pressure.
2.5 Pressure-Balanced Structure
The valve adopts a pressure-balancing mechanism to reduce the influence of medium pressure on valve movement.
This improves operating sensitivity and helps maintain more precise pressure regulation.
2.6 Reliable Sealing Performance
Both hard-seat and soft-seat configurations are available according to application requirements.
The catalog specifies leakage performance in accordance with ASME B16.104, allowing the valve to be selected for different shutoff requirements.
3. Working Principle
3.1 Pressure Sensing
Process pressure acts on the sensing diaphragm and generates a corresponding force.
3.2 Valve Position Adjustment
When the controlled pressure deviates from the preset value, the regulating mechanism changes the position of the valve plug.
The valve flow area is therefore increased or reduced automatically.
3.3 Pressure Stabilization
The change in valve opening adjusts the flow of the process medium until the controlled pressure returns toward the required setting.
Depending on the selected configuration, the valve can be used for upstream pressure regulation or downstream pressure regulation.
This automatic regulating process helps maintain stable pressure even when operating conditions fluctuate.
4. Technical Parameters
4.1 Basic Specifications
| Parameter | Specification |
|---|---|
| Product Model | ZZYP |
| Valve Type | Self-Operated Pressure Regulating Valve |
| Body Form | Straight casting valve body |
| Spool Form | Non-balanced single-seat valve |
| Nominal Size | DN15–DN300 / NPS 1/2″–12″ |
| Nominal Pressure | PN1.6–4.0 MPa / Class 150–300 LB |
| Applicable Temperature | -20°C to +350°C |
| Connection | Flange |
| Face-to-Face Standard | IEC 60534 |
| Leakage Standard | ASME B16.104 |
| Set Value Deviation | ±8% |
| Flow Characteristic | Quick Opening |
| Adjustment Precision | ±5% |
These specifications are taken from the ZZYP technical data in the product catalog.
4.2 Pressure Setting Range
The ZZYP series provides multiple pressure-setting ranges, including:
15–50, 40–80, 60–100, 80–140, 120–180, 160–220, 200–260, 240–300, 280–350, 330–400, 380–450, 430–500, 480–560, 540–620, 600–700, 680–800, 780–900, 880–1000, 600–1500 and 1000–2500 kPa.
The appropriate range should be selected according to the required controlled pressure and actual operating conditions.
4.3 Flow Capacity
The catalog provides rated Kv values from 7 up to 1750, depending on nominal valve size.
Valve sizing should be determined according to flow rate, inlet pressure, outlet pressure, medium properties and required pressure drop.
5. Structure and Materials
5.1 Valve Body
Available body materials include:
- ZG230-450
- ZG1Cr18Ni9Ti
- ZGCr18Ni12Mo2Ti
5.2 Valve Trim
Spool, seat and stem materials include:
- 1Cr18Ni9Ti
- Cr18Ni12Mo2Ti
5.3 Packing
Available packing materials include:
- PTFE
- Flexible graphite
5.4 Diaphragm
Available diaphragm materials include:
- Nitrile rubber
- Oil-resistant rubber
- Fluorine rubber
Different material combinations can be selected according to medium, temperature and service conditions.
6. Applications and Operational Advantages
6.1 Gas Pressure Control
Suitable for gas pipeline systems requiring automatic upstream or downstream pressure stabilization.
6.2 Liquid Pressure Control
Suitable for industrial liquid systems where pressure fluctuations need to be controlled continuously.
6.3 Steam Service
With appropriate material and temperature selection, the ZZYP can be used in steam pressure-regulating applications within the specified operating range.
6.4 Stable Process Operation
By reducing pressure fluctuations, the valve helps provide more stable operating conditions for downstream pipelines and equipment.
6.5 Reduced Manual Intervention
Continuous automatic pressure adjustment reduces the need for frequent manual pressure correction during normal operation.
6.6 Flexible Configuration
The wide range of valve sizes, pressure-setting ranges, materials and sealing options allows the ZZYP series to be configured for different industrial process conditions.
