DOUBLE OFFSET BUTTERFLY VALVE

Summary 

The ultra high perfor mance butterfly valve has ultra unique product structure, ultra reliable sealing perfom,ance, ultra wide wo水ingconditions, ultra low operating torque and ultra long service life. It is safe and fireproof under special working conditions, staying at the leading position among other similar products in the world. 

The series of high performance wafer type butterfly valves uses various structure materials, including those that meet NACE requirements and anticorrosive materials. Special valves that can be used in chlorine, oxygen, high vacuum. corrosi ve media and cryogenic condition are also available.

Features  

● The unique dynamic load seal PTFE seat design is adopted with good elasticity and high reliability. 

● Sealing can be maintained without the need of adding O ring or metal part. 

● The lip type sealing structure can compensate for the changes of temperature and pressure. 

● Long service life and low maintenance. 

● In seal test, there is no bubble and leakage at both directions. 

Provided with shut-off and control functions  

● Having excellent control characteristics 

● Proportional change of flow characteristic curve 

● Wide adjusting range 

● Tight sealingcan be realized even when it is used for control.

Design of offset shaft and eccentric butterfly plate 

The seat and butterfly plate do not contact each other when the valve is opened or at the middle position. There is no wear point at the upper and lower parts of the seat. Low torque with low requirement for operating mechanism. 

Fire resistant structure 

The fire resistant type valve is subjected to fire test according to API 607.

Seat type  

PTFE, R-PTFE, PEEK, Fireproof seat, etc.

Reliable fixing of shaft  

The anti-blow-out structure is provided at the top of the shaft to prevent the shaft from running out of the gland in case of accidental breaking of the shaft.

Convenient seat maintenance and servicing 

The seat can be replaced just through removing the inserts without the need of disassembling the butterfly valve and shaft.

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