For dimensions, please refer to the differential pressure stainless steel valve on pages 108 and 109.
Fushiman Co.
Fushiman RMD31D type differential pressure valve for liquids
Manufacturer: Fushiman Co.,LTD.
Model: RMD31D
| Model | Nominal diameter | Primary pressure measurement | Differential pressure setting range | Maximum operating temperature | Body Material | Connection |
|---|---|---|---|---|---|---|
| RMD31D | 15–100 | Max. 1.0 MPa | 0.035 to 0.35 MPa | 80℃ | FC, SCPH, SCS | Flanges |
For detailed explanations of the RMD31D and RFD42D differential pressure valves, please refer to the differential pressure stainless steel valve on pages 108 and 109.
Additionally, for gas applications, we also manufacture DPD41B-2 and DLG61-2 differential pressure valves.
Specifications
| Model | RMD31D | RFD42D | |
| Fluid | Cooling Water | Cold / Warm Water | |
| Nominal Diameter | 15 〜100 | 40〜300 | |
| Set Pressure Differential Range | For nominal diameter 15–80: 0.035–0.3, 0.2–0.7 MPa For nominal diameter 100: 0.035–0.3, 0.2–0.55 MPa | 0.05〜0.25、0.2-0.65MPa | |
| Offset at Rated Flow Rate | ≤ 0.08MPa | Within 10% of the set differential pressure (minimum value: 0.04 MPa) | |
| Shut-off Pressure Drop (Differential Pressure) | Approx. 0.02 MPa | Approx. 0.02 MPa | |
| Minimum Adjustable Flow Rate | 3–5 L/min | 3–5 L/min | |
| Materials | Main Valve & Valve Case | Cast iron, cast steel, or stainless steel cast steel | Cast iron, cast steel, or stainless steel cast steel |
| Main Valve: Valve Body & Diaphragm | Synthetic rubber | Synthetic rubber | |
| Pilot Valve: Valve Case | — | Bronze or stainless steel cast steel | |
| Main Valve Connection | Flange JIS 10K | Flange JIS 10K, 16K, 20K | |
Remarks: The set pressure differential range, offset, shut-off pressure drop, and flange connection specifications vary depending on the nominal diameter and main valve body material. For details, please refer to the differential pressure stainless steel valve page.
