Butterfly-style valves are a hydro, Mechanical device to isolate / Manage the stream medium in either direction & also typically employed for governing a fluid. In a robust construction of double flanged body one stainless steel seat ring is fitted in the flow path. A robust circular disc is positioned in the heart related to the form. The disk is secured on dual hub stub shaft which is swing through both end body housing. A resilient / crafted with durable stainless steel seat ring moves inside the disc & one disc seat retainer is placed to retain it. A gear / hand lever operated drive shaft. In that moment of sealing action the contracting seating surface effect the sealing and ensuring leak proof sealing. In full open position it facilitate low interrupted reduce bore flow path resulting minor / low head loss. Characteristic incorporates leak-proof sealssturdy designhassle-free operationreplaceable partsUser-friendly installationlong-lasting durabilitylow maintenanceeasy operationmechanically advancedfull proof designminimum headlosstotally reliableno throttling effectheist degree of accuracyon / off or regulating dutyoptional arrangementbypassposition indicatorlifting lugsself lubricated bearinghandwheel lockingdisc movement stopperchainwheel driveextension shaftfloor stand / headstockmuff couplinghand lever operationshaft sealsupporting feetsquare cap operationriveted seatscrewed in seatposition limit switchuniversal coupling