Butterfly valve, zero leakage.bi-directional seal,double flange, double eccentric Butterfly valve, rubber seated.double flange, double eccentric,Manufacture acc.to EN593Face to face length acc.to DIN3202 F4, ISO5752 series 14Flange acc.to DIN2501Body and disc of DI, CS, SSShaft of SSSeal ring on disc of EPDMBody seat of SS304with bare shaft, manual, gear, electric, pneumatic or others.