Fushiman Co.
Fushiman PPD41-3 Pressure Reducing Valves
Manufacturer: Fushiman Co.,LTD.
Model: PPD41-3
| Model | Nominal Diameter | Primary Pressure | Secondary Pressure Range | Maximum Operating Temperature | Body Material | Connection |
|---|---|---|---|---|---|---|
| PPD41-3 | 15〜25 | MAX. 1.6MPa | 0.03～0.7MPa | 220℃ | FCD,SCPH,SCS | Threaded, Flange |
- Compact design, suitable for low flow rates.
- The valve body is designed with a free ball structure and uses wear-resistant materials.
- The diaphragm is made of heat-resistant synthetic rubber, allowing it to respond sensitively to pressure changes.
Specifications and Materials
| Fluid | Pressure MPa | Temperature (°C) | Main Component Materials | Pipe Connection | |||||
|---|---|---|---|---|---|---|---|---|---|
| Primary Side | Secondary Side Setting Range | Valve Body | Spring Protector | Valve Body & Seat | Bottom Cover | Diaphragm | |||
| Steam | 0.05-1.6 | 0.03-0.15 0.1-0.7 | Saturation ~ 220 | Spheroidal Graphite Cast Iron | Spheroidal Graphite Cast Iron | Stainless Steel | Brass | Heat-resistant Synthetic Rubber | JIS Rc Threaded Type |
| 0.05-1.0 | Spheroidal Graphite Cast Iron | Brass | Flange JIS 10K Full Face | ||||||
| 0.05-1.6 | Cast Steel | Stainless Steel | Flange JIS 20K Flat Face | ||||||
| 0.05-1.0 | Stainless Steel Cast Steel | Stainless Steel | Flange JIS 10K Full Face | ||||||
Note:
- ASME Class 150 and 300 flange-type valve bodies made of cast steel are also available.
- Versions for a primary pressure of 4.0 MPa can also be manufactured.
- Diaphragms made of stainless steel for high-temperature use are also available.
Performance
| Minimum Set Differential Pressure | 0.02 MPa |
|---|---|
| Offset | Within 10% of the maximum set pressure |
| Shut-off Pressure Rise | 0.02 MPa or less |
| Minimum Adjustable Flow Rate | 0.35 kg/h |
| Seat Leakage | 0.05% or less of the rated flow rate |
Cv Value
| Nominal Diameter | 15 | 20・25 |
|---|---|---|
| CV | 0.4 | 1 |
Structure and Dimensions
| Cast Iron, Threaded Type | Cast Iron, Flange Type | Cast Steel, Stainless Steel Cast Steel, Flange Type |
|---|---|---|
 |  |  |
Dimensions and Mass
(mm, kg)
| Valve Box Material | Nominal Diameter | Main Dimensions | Mass | Pipe Connection | ||||
|---|---|---|---|---|---|---|---|---|
| d | L | Hi | h2 | E | ||||
| Ductile Cast Iron | 15 | 1/2 | 95 | 51 | 165 | 100 | 2.6 | JIS Rc Threaded Type |
| 20 | 3/4 | 130 | 65 | 222 | 130 | 5.8 | ||
| 25 | 1 | 130 | 65 | 222 | 130 | 5.8 | ||
| Ductile Cast Iron | 15 | — | 170 | 62 | 162 | 100 | 4.7 | Flange JIS 10K Full Face |
| 20 | — | 215 | 75 | 218 | 130 | 8 | ||
| 25 | 215 | 75 | 218 | 130 | 9 | |||
| Cast Steel | 15 | — | 211 | 73 | 213 | 130 | 8.3 | Flange JIS 20K Flat Face |
| 20 | — | 215 | 73 | 213 | 130 | 8.7 | ||
| 25 | — | 215 | 73 | 213 | 130 | 9.3 | ||
| Stainless Steel Cast Steel | 15 | — | 207 | 73 | 210 | 130 | 8.3 | Flange JIS 10K Full Bore |
| 20 | — | 211 | 73 | 210 | 130 | 8.7 | ||
| 25 | — | 211 | 73 | 210 | 130 | 9.3 | ||
Call Route Selection
Please select the appropriate call route according to the call route selection chart.
If the nominal diameter is too small, the required flow rate cannot be obtained. However, if it is too large, hunting may occur, leading to abnormal wear.
When the primary-side pressure and the set pressure are constant, if there is a range, select a nominal diameter that minimizes the differential pressure. Choose the nominal diameter based on the primary-side pressure and set pressure. Additionally, the minimum adjustable flow rate of the reducing valve must be at least 0.35 kg/h.
