按橡胶密封圈使用性能，根据具体情况定期对阀体的密封圈进行更换，以保证阀门的密封性能。
Exchange the sealing ring of the valve body according to the working condition of rubber sealing ring in order to ensure the sealing performance.
该蝶阀采用阀体同质材料加工成密封圈，采用电或气传动。
The butterfly valve using the same materials as seals, the use of electric or gas transmission.
根据介质性能及使用期，应经常检查阀体顶部四氟密封圈和孔板部的四氟薄片。
According to media performance and the use of period and should always check the valve orifice at the top of the Ministry of PTFE seals and PTFE sheet.
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