We manufacture more than a thousand specifications of over ten series of products, including safety valves, power station valves, steam extraction check valves, gate valves, globe valves, check valves, hard-sealed ball valves, all-welded ball valves, ball valves, butterfly valves, and other models and specifications.
GA42H-25/40/64/100
Single lever safety valve
The GA42H single-lever safety valve is applicable to equipment and pipelines with air, steam, and other media operating at temperatures ≤450℃, serving as a pressure relief device. When the pressure inside the equipment and pipelines exceeds the allowable value, the valve automatically closes to ensure the safe operation of the equipment and pipelines.
Product Structural Characteristics:
1. The lever-type safety valve has a simple structure, making it easy and relatively accurate to adjust.
2. The added load does not increase significantly due to the rising of the valve disc, suitable for high-temperature situations.
3. The lever-type safety valve structure is relatively bulky, and the loading mechanism is prone to vibration, often causing leakage due to vibration; its reseating pressure is relatively low, and it is not easy to close and maintain tightness after opening.
Product Classification:
Key words:
Main Performance Specifications
Model | Nominal Pressure (MPa) | Working Pressure (MPa) | Set Pressure (MPa) | Applicable Temperature (°C) | Resealing Pressure Difference | Applicable Medium | Rated Displacement Coefficient |
GA42H-25 | 2.5 | 0.78-1.57 | 1.04 times the working pressure | -29~300℃ | 4%-10% of set pressure | Steam | 0.24 |
GA42H-40 | 4.0 | 1.57-2.45 | -29~400℃ | ||||
GA42H-100 | 10.0 | 2.45-4.41 | -29~425℃ |
Main Component Materials
Part Name | Valve Body | Valve Seat/Valve Disc | Valve Stem | Bushing | Lever | Weight |
Material | Carbon Steel Casting | Stainless Steel | Stainless Steel | Stainless Steel | Carbon Steel | Grey Cast Iron |
Main External Connection Dimensions
Model | Nominal Diameter DN (mm) | Size (mm) | Remarks | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
H | L | D | D1 | D2 | D6 | b | Z-φd |
| ||
GA42H-25 | 50 | 430 | 720 | 160 | 125 | 100 | 20 | 4-φ18 |
| |
80 | 435 | 720 | 195 | 160 | 135 | 22 | 8-φ18 |
| ||
100 | 520 | 1100 | 230 | 190 | 160 | 24 | 8-φ23 |
| ||
GA42H-40 | 50 | 430 | 720 | 160 | 125 | 100 | 88 | 20 | 4-φ18 |
|
80 | 435 | 720 | 195 | 160 | 135 | 121 | 22 | 8-φ18 |
| |
100 | 520 | 1100 | 230 | 190 | 160 | 150 | 24 | 8-φ23 |
| |
GA42H-64 | 50 | 430 | 720 | 175 | 135 | 105 | 88 | 26 | 4-φ23 |
|
80 | 435 | 720 | 210 | 170 | 140 | 121 | 30 | 8-φ23 |
| |
100 | 440 | 720 | 250 | 200 | 168 | 150 | 32 | 8-φ25 |
| |
GA42H-100 | 50 | 430 | 720 | 195 | 145 | 112 | 88 | 28 | 4-φ25 |
|
80 | 435 | 720 | 230 | 180 | 148 | 121 | 34 | 8-φ25 |
| |
100 | 440 | 720 | 265 | 210 | 172 | 150 | 38 | 8-φ30 |
| |
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Connecting flanges conform to JB/T 79 standard.
Connecting flanges are in accordance with JB/T79 standard.