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GA42H型单杠杆安全阀适用于温度≤450℃的电站锅炉和压力容器上，防止压力超过允许最高值，介质可为蒸汽、空气。
GA42H type safety valve is applicable to the power-station boiler and pressure container ( The working temperature is 450 or less. ) which will avoid the pressure rate beyond the allowed upper limit. The medium can be steam or air.
| 主要零部件材料Materials for main parts | ||
| NO. | Name of part | 材料Materials |
| 1 | Body | 碳钢Carbon steel |
| 2 | Guide sleeve | 不锈钢Stainless steel |
| 3 | Disc | 2Cr13 |
| 4 | Stem | 2Cr13 |
| 5 | Lever | 碳钢Carbon steel |
| 6 | Hammer | 铸铁Cast iron |
| Type | Nominal diameter DN(mm) | Dimensions (mm) | |||||||||||||||||||
| do-z | D | D1 | D2 | D6 | f | f1 | b | Z- d | L | H | |||||||||||
| DN' | D2' | D1' | D' | n-M | d1 | K2 | K3 | D3 | |||||||||||||
| GA42H-16 | 50 | 401 | 165 | 125 | 100 | / | 3 | / | 16 | 4-18 | 840 | 412 | 125 | 175 | 200 | 235 | 8-M16 | 120 | 145 | 162 | 190 |
| GA42H-25 | 50 | 401 | 165 | 125 | 100 | / | 3 | / | 20 | 4-18 | 840 | 412 | 125 | 175 | 200 | 235 | 8-M16 | 120 | 145 | 162 | 190 |
| GA42H-40 | 50 | 401 | 165 | 125 | 100 | 88 | 3 | 4 | 20 | 4-18 | 840 | 412 | 125 | 175 | 200 | 235 | 8-M16 | 120 | 145 | 162 | 190 |
| GA42H-64 | 50 | 401 | 175 | 135 | 105 | 88 | 3 | 4 | 26 | 4-23 | 840 | 420 | 125 | 175 | 200 | 235 | 8-M16 | 120 | 145 | 162 | 190 |
| GA42H-100 | 50 | 401 | 195 | 145 | 112 | 88 | 3 | 4 | 28 | 4-25 | 840 | 420 | 125 | 175 | 200 | 235 | 8-M16 | 120 | 145 | 162 | 190 |
