Feature:

1.Conentric type or called middle line,

2.Seat Ring:NBR,CR,NR,EPDM,FKM,PTFE,PCTFE,FEP,PFA

3.Body lining:NBR,CR,NR,EPDM,FKM,PTFE,PECTFE,FEP,PFA,

4.Seal with two way function,pressure,flow can be allowed to adjust freely.

5.The use of patented technology to have lined butterfly processing board, plastic and metal fluoride matrix closely with seamless, efficient scheduling to make laminated bubble, since the elimination of layers, cracks and other defects in process.

6.Seat with 360 degree radial sealing force elastic pad back to exert radial force, the automatic adjustment of deformation, a reliable guarantee for long-term use of state media with no leakage. Butterfly board, under the shoulder-axis multi-level flexible sealing load to achieve automatic compensation sealed so that the whole constitutes a shaft seal without gaps vice to ensure that no leakage of media.

7.Top flange ISO5211 for optional

8.Sealing materials have the advantages of anti-aging,corrosion resistant,long duration,etc

9.Strong wash and brush resistance and can fit to bad working condition.

10.Long service life