4599 Butterfly valves
·【Main technical parameters】
Type: flat offset casting
Valve size：2"~ 80"
Nominal pressure：ANSI 150LB~300LB
Connection：jacket flanged type
Material：A216 WCB、A351 CF8、 A351 CF8M （according to customer requirements）
Notice the range of working temperature and pressure for different materials.
Packing：PTEE, flexible graphite, steel wire reinforced flexib e graphite
Body coating: silver grey (epoxy resin). No coating shall be added if the body material is stainless steel.
Disc type：three—eccentric rotary type
Seat type：U type metal ring
Flow characteristic：approximate equal percentage
Rated travel：0~70° or 0~90°
Seat leakage：ANSI Class lV~VI
·The WBy high performance sealing heat insulation jacket butterfly valve adopts metal U type elastic seat. The seat is floating type, with the automatic center adjusting function and good sealing performance. When the valve is opened or closed, the seat and disc drop instantly to eliminate friction and wear.
·The disc adopts three—eccentric structure, and the sealing face adopts hard alloy overlaying welding with good anti—wear performance.
·The seat has self—compensation structure, which enhances the service life of valve.
·The sealing of disc and seat adopts metal—to-metal linear sealing, so that the valve is provided with the automatic shearing function during the operation.
·The heat insulation interlayer is designed into full coating type, so as to cover the whole body and shaft sleeve inside the interlayer with good heat insulation effect.
·The shaft sleeve is additionally provided with the anti—dust device at its bottom to prevent media from entering the shaft sleeve and locking the valve stem.
·The three steam connections adopt dead—corner-free design to effectively discharge condensing water and facilitate free installation of the valve.
·The valve flow characteristic is approximate equal percentage curve. It can be used for control and shut—off.
·【Scope of application】
The heat insulation jacket butterfly valve is w'dely used to realize local control and remote automatic control on process pipes that require heat insulation or heating of media during production in petroleum, chemical industry, light industry, electric power, metallurgy and other industries.