Safety and Relief Valve
AL-4T
* Simple structure and easy maintenance * Tight seal because of PTFE disc * Line-up of body material: ductile cast iron and stainless steel |
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Feature | Lift type / Flanged / Ductile iron / Soft seat | |
Category | Safety relief valve | |
Type | Lift type | |
Specifications | Application | Air , Oil , Cold and hot water , Other non-dangerous fluids |
Pressure range | 0.05 - 1.5MPa("\"\\\"(*1) (*2) Refer to setting pressure range table.\\") | |
Connection | JIS 10K FF flanged , JIS 16K FF flanged (*3) | |
Max. temperature | 150 degree(C) | |
Material | Valve case | Ductile cast iron |
Spring case | Ductile cast iron | |
Valve | Cast bronze or Stainless steel (PTFE disc incorporated) | |
Valve seat | Cast bronze or Stainless steel (PTFE disc incorporated) |

*1 Maximum working pressure for 150A is 0.8 MPa (connection: JIS 10K FF flanged). *2 When working pressure is more than 1.2 MPa (for 65A and 80A) or 1.0 MPa (for 100A and 125A), a metal-to-metal seating is incorporated in. *3 JIS 16K FF flanged is used when working pressure is more than 1.0 MPa. |
JIS 10K FF flanged
Size | L (mm) | H1 (mm) | Weight (kg) |
65A(2 1/2) | 120 | 120 | 20 |
80A(3) | 130 | 130 | 22 |
100A(4) | 160 | 150 | 44 |
125A(5) | 200 | 205 | 88 |
150A(6) | 210 | 215 | 113 |
JIS 16K FF flanged
Size | L (mm) | H1 (mm) | Weight (kg) |
65A(2 1/2) | 120 | 120 | 20 |
80A(3) | 132 | 130 | 22 |
100A(4) | 162 | 150 | 44 |
125A(5) | 202 | 205 | 88 |
[About flow rate]
Selection data: | Set pressure range |

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Drawing (523 KB) |