- Typically used on the outlet side of pressure reducing valve or small pressure vessels
- Trim: stainless steel
Yoshitake
YOSHITAKE AL-301 Safety And Relief Valve

Manufacturer: Yoshitake
Model: AL-301
| Features | Ductile iron, flanged, SS trim | |
|---|---|---|
| Type | Safety valve | |
| Specifications | Product type | Safety valve/Relief valve |
| Nominal size | 15A (1/2″) – 50A (2″) | |
| Application | Steam | |
| End connection | JIS 10K FF flanged,JIS 16K FF flanged | |
| Working pressure | 0.05 – 1.6 MPa (*) | |
| Max. temperature | 220 degree(C) | |
| Material | Body | Ductile cast iron |
| Spring case | Ductile cast iron | |
| Valve and valve seat | Stainless steel | |
Remarks
*JIS 16KFF flanged when working pressure is more than 1.0MPa.
Dimensions and Weights
| Size | L (mm) | H1 (mm) | Weight (kg) |
|---|---|---|---|
| 15A(1/2) | 90 | 108 | 4.7 |
| 20A(3/4) | 90 | 108 | 5 |
| 25A(1) | 90 | 108 | 6.2 |
| 32A(1 1/4) | 91 | 115 | 8.6 |
| 40A(1 1/2) | 91 | 115 | 8.8 |
| 50A(2) | 105 | 132 | 12.6 |
About flow rate
Selection data:
Apply Pressure Classification List
(unit: MPa)
| Model | Nominal size | A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|---|---|
| AL-300·301 | 15A-50A | 0.05-0.25 | 0.26-0.5 | 0.51-0.75 | 0.76-1.6 |
■Certified Capacity Table for AL-300 · 301
- For steam (saturation temperature) <Pressure vessel structure standard>
(kg/h)
| Nominal size | Pressure MPa | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.05 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | |
| 15A | 38 | 50 | 73 | 98 | 123 | 148 | 172 | 196 | 220 | 244 | 268 | 292 | 316 | 340 | 364 | 387 | 411 |
| 20A | 38 | 50 | 73 | 98 | 123 | 148 | 172 | 196 | 220 | 244 | 268 | 292 | 316 | 340 | 364 | 387 | 411 |
| 25A | 38 | 50 | 73 | 98 | 123 | 148 | 172 | 196 | 220 | 244 | 268 | 292 | 316 | 340 | 364 | 387 | 411 |
| 32A | 85 | 110 | 160 | 214 | 270 | 324 | 377 | 430 | 482 | 535 | 588 | 640 | 693 | 745 | 798 | 849 | 902 |
| 40A | 89 | 116 | 168 | 226 | 285 | 342 | 398 | 454 | 509 | 564 | 620 | 675 | 731 | 786 | 841 | 896 | 951 |
| 50A | 155 | 201 | 292 | 392 | 494 | 592 | 689 | 785 | 881 | 977 | 1073 | 1169 | 1265 | 1360 | 1456 | 1551 | 1646 |
Dimensional drawing












