... and vortex, eliminates washing by solids in fluid PFFA Series Gate valve• Full bore design eliminates efficiently pressure drop and vortex, ... to supply sealant and improve seal and lubrication performance of gate and seat.• Can complete with different pneumatic (hydraulic) actuator ... H2S,CO2• Working Temperature: -46°C~121°C(Class LU)• Material Class: AA,BB,CC,DD,EE,FF,HH• Specification level ...