Diaphragm Pressure Reducing Valve
Nominal Diameter: DN20~400mm
Nominal Pressure: PN1.0~6.4MPa
Applicable Media: Water, Air
Applicable Temperature: ≤90°C
Diaphragm Pressure Reducing Valve
The Diaphragm Pressure Reducing Valve (DPRV) is a precision control valve designed to automatically reduce and stabilize downstream pressure of liquids or gases regardless of upstream pressure fluctuations or changes in flow rate. The valve uses a diaphragm mechanism to sense downstream pressure and adjust the valve opening for accurate pressure regulation.
It provides stable pressure control, fast response, energy efficiency, and low maintenance. Its compact design, reliable operation, and wide range of material options make it suitable for water supply, steam, compressed air, chemical processes, and industrial automation systems.
As a professional valve manufacturer, we provide full OEM and ODM services tailored to customer specifications.
Body Materials:
Diaphragm Materials:
Trim Materials:
Parameter Specifications
| Item | Specification |
|---|---|
| Product Name | Diaphragm Pressure Reducing Valve |
| Valve Type | Self-operated / Pilot-operated DPRV |
| Nominal Size | DN15–DN500 (½"–20") |
| Pressure Rating | PN10–PN420 / ANSI Class 150–1500 |
| Body Material | WCB, WCC, SS304, SS316, Duplex SS, Bronze |
| Diaphragm Material | PTFE, EPDM, NBR, Viton |
| Trim Material | Stainless Steel, Monel, Hastelloy |
| Connection Type | Flanged, Threaded, Welded |
| Flange Standard | ANSI, ASME, DIN, EN, JIS, GB |
| Inlet Pressure | Up to 42 MPa |
| Outlet Pressure | 0.05–16 MPa (Adjustable) |
| Pressure Control Accuracy | ±5% |
| Operating Temperature | -40°C to +200°C (PTFE/EPDM), Up to 300°C (Metal Diaphragm) |
| Leakage Class | ANSI/FCI 70-2 Class IV/V |
| Flow Media | Water, Steam, Gas, Compressed Air, Oil, Chemicals |
| Operation Type | Automatic, Diaphragm-controlled |
| Optional Accessories | Pressure Gauge, Strainer, Safety Valve, Pilot Controller |
| Design Standard | ASME B16.34, API 602 |
| Inspection & Testing | API 598, EN 12266 |
| Installation Position | Horizontal or Vertical Pipeline |
Industry Applications
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
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