Safety and Relief Valve
AL-250R
* Superior durability due to all stainless steel made * Simple structure and easy maintenance * Unique structure especially for relief valve * Stable operation even with back pressure change produced in continuous blow * Set pressure is easily changed by handle |
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Feature | Proportional type / Screwed / Stainless steel / With handle | |
Category | Relief valve | |
Type | Proportional type | |
Specifications | Application | Cold and hot water , Oil , Other non-dangerous fluids |
Pressure range | 0.05 - 1.0MPa("Refer to setting pressure range table.") | |
Connection | JIS Rc screwed | |
Max. temperature | 120 degree(C) | |
Material | Spring case | Cast stainless steel |
Valve | Stainless steel | |
Valve seat | Stainless steel |

Size | L (mm) | H1 (mm) | Weight (kg) |
15A(1/2) | 34 | 41 | 0.9 |
20A(3/4) | 38 | 45 | 1.1 |
25A(1) | 43 | 51.5 | 1.4 |
32A(1 1/4) | 50 | 63.5 | 2.5 |
40A(1 1/2) | 60 | 68.5 | 3.7 |
50A(2) | 75 | 80 | 6.0 |
[About flow rate]
Selection data: | Set pressure range Nominal Size Selection Chart (For Water) |

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Drawing (138 KB) |
Instruction manual (269 KB) |
CAD external view (213 KB) |