ss 316 butterfly valves Description
316 butterfly valve is an industrial valve with 316 austenitic stainless steel (containing 16%-18% chromium, 10%-14% nickel, 2%-3% molybdenum) as the valve body and butterfly plate material. The addition of molybdenum significantly improves the chloride ion corrosion resistance and is suitable for fluid control scenarios with high corrosion, high temperature or high cleanliness requirements. Its core features include:
Corrosion resistance enhancement: Molybdenum can resist corrosion from chlorides (such as seawater, salt spray) and media such as sulfuric acid and acetic acid, and the risk of pitting corrosion is reduced by more than 50% compared with 304 stainless steel;
High temperature adaptability: The continuous use temperature can reach 870℃, and some hard sealing structures can withstand high temperature conditions of 425℃;
Sanitary compatibility: The 316L low-carbon version can be mirror polished (Ra≤0.8μm) to meet the GMP standards of the pharmaceutical and food industries.
ss 316 butterfly valves specification
| Name: | Butterfly valve |
| Application: | Flow control |
| Material: | SS304/ SS316L |
| Size: | 1/2"-4" DN15-DN100 |
| Connection: | Threaded(SMS, DIN, RJT)/ Clamped/ Welded |
| Operation: | Manual |
| Handle type: | Pull handle/ Multi-position handle |
| Delivery Time: | 15 working days |
| Supply Capacity: | 1000 Piece/Pieces per Month |
| Payment | L/C,T/T |
Comparison between 316 butterfly valve and 304 butterfly valve
| Terms | 316 butterfly valve | 304 butterfly valve |
|---|---|---|
| Chemical composition | Contains 2%-3% molybdenum to enhance resistance to chloride ion corrosion | Molybdenum-free, high chromium-nickel ratio (18%Cr/8%Ni) |
| Corrosion resistance | Resistant to seawater, strong acid and Cl⁻-containing media, low pitting rate | Applicable to weakly corrosive environments (such as fresh water, atmosphere) |
| Applicable temperature | -196℃~870℃,Higher high temperature strength retention rate | -196℃~800℃,Conventional low and medium temperature scenarios |
| Economical | High unit price, suitable for high corrosion/high hygiene requirements | The cost-effectiveness is obvious, covering 80% of conventional working conditions |
| Typical Applications | Offshore platforms, chemical plant reactors, CIP cleaning systems | Building water supply and drainage, HVAC, general food processing |
ss 316 butterfly valves
Application of 316 stainless steel butterfly valve
Marine engineering
Seawater pipeline system interception and regulation, resistant to salt spray and marine microbial erosion (such as ship ballast water system).
Chemical and pharmaceutical
Strong acid (sulfuric acid, hydrochloric acid), organic solvent pipeline control, molybdenum element improves the life of valves supporting reactors and storage tanks.
Food processing
High-salt, acidic food (such as soy sauce, fermentation liquid) transportation, 316L material + PTFE seal to avoid medium contamination.
Energy and environmental protection
Chlorine-containing wastewater treatment (such as sewage treatment plants), geothermal steam pipelines, high temperature and particle erosion resistance.
Advantages and disadvantages of 316 stainless steel butterfly valve
Advantages:
Corrosion resistance: The life in Cl⁻-containing media is 3-5 times longer than that of 304 butterfly valves, reducing the risk of leakage; High temperature stability: The antioxidant capacity is better than 304 at 870℃, suitable for boiler steam pipelines; Multi-scenario compatibility: Hard seal and soft seal are optional, covering the temperature range of -196℃~425℃.
Disadvantages:
High cost: Material and processing costs are 30%-50% higher than those of 304 butterfly valves;
Insufficient hardness: The butterfly plate needs to be welded with hard alloy (such as tungsten carbide) to cope with the wear of media containing solid particles.
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