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Smple flange（GB6070、JB919）:0.6X106~1.3X10-4Pa 
Quick release flange（GB4982）:0.1X106~1.3X10-4Pa 
Threaded connection:1.6X106~1.3X10-4Pa 
Valve Leakage rate:≤1.3X10-4Pa.L/S 
Applicable temperature:-29~+150°C 
Applicable medium:water,steam,oil,corrosive media.