Features:
Leflow is providing high quality Double offset butterfly valve according to DIN and AWWA standard.
Double offset uses two separate offsets to achieve a bubble-tight. One of the offsets is the location of the valve shaft relative to the centerline of the bore. Another offset is between the centerline of the disc/seat sealing surface and the shaft.
This structure make the valve has following benefits:
- Double Eccentric structure ensures low operating torques with zero leakage performance;
- Inner and outer surfaces of the valve are coated with fusion bonded epoxy,and Its thickness can be adjustable;
- Low moments are obtained by decreasing the friction through self-lubricating bushings;
- Can bear high stretching stresses on the pipeline through the ductile iron body and disc;
- High impact resistance.
- Pressure loss is at minimum level by double shaft design.
- Sealing gaskets fasten by bolt can be replaced at field condition;
- With the o-rings on the bearing bushings, disc pin holes are protected against corrosion (Dry shaft);
- Retaining ring is assembled to the disc with imbus bolts, the disc is protected against corrosion by placing o-rings under the bolts.
- Stainless steel weldingseat can reach better sealing
