| Customization: | Available |
|---|---|
| Media: | Water |
| Temperature: | Ordinary Temperature |
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Parameter Category | Common Data Range | Explanation |
Standard | DIN EN 12627, DIN 3352, DIN 2501, etc. | Specific standards in the German standard system, affecting structural dimensions and performance requirements. |
Nominal Diameter (DN) | DN15 ~ DN300 (common), up to DN600 | Pipe inner diameter, needs to match the pipeline system. |
Pressure Class | PN10, PN16, PN25 (German PN series) Class 150 (equivalent to American standard) | Corresponding working pressure: PN16 ≈ 1.6MPa, PN25 ≈ 2.5MPa. |
Body Material | GG25, GG30 (grey cast iron) GGG40 (ductile cast iron) | The grade of cast iron affects strength and corrosion resistance; GGG40 has better performance. |
Applicable Media | Water, steam, oil, neutral gas, weakly corrosive liquids (e.g., dilute acid, alkali) | For strongly corrosive media, special linings or materials (e.g., fluorine lining) are required. |
Bellows Material | 304 stainless steel, 316 stainless steel, Hastelloy C-276, etc. | Needs to adapt to medium temperature and corrosion; 316L stainless steel is commonly used in high-temperature scenarios. |
Actuation Method | Manual (handwheel/handle), electric, pneumatic, hydraulic | Electric/pneumatic actuation requires actuators, suitable for automated control systems. |
Service Temperature | -20°C ~ 250°C (conventional cast iron) -40°C ~ 350°C (high-temperature type, requiring upgraded bellows material) | Above 250°C may require ductile cast iron or high-temperature alloys. |
Leakage Class | API 598 VI (zero leakage), ISO 15848-1 low leakage level | Bellows sealing can achieve bubble-level sealing, suitable for strict anti-leakage scenarios (e.g., toxic media). |
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