Soft sealing butterfly valve suitable for below 100 ℃ hot water and cold water systems. If the system requires higher temperature, the metal sealing butterfly Industrial Valves (available Available in the system under 500 ℃) 。 Soft sealing butterfly valve sealing ring ( All sorts of commonly used rubber, ptfe) The highest use temperature: NBR NBR 80 ℃ or less and EPDM EPDM 120 ℃ or less, PTFE teflon 150 ℃ or less. In acid and alkali medium highest use temperature is: 1, neoprene: nitric acid ( 10%) 29℃； Citric acid 29 ℃; Hydroxide at 93 ℃. Sulfuric acid (2, butyl rubber: 50%) 66℃； Nitrate ( 10%) 40℃； Hydroxide at 85 ℃. 3, the F4: acid ( 0 - 100%) 180℃； Nitrate ( 0 - 100%) 180℃； Sodium hydroxide 180 ℃ in this paper, the key word search: more technical articles valve product supply information
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