Technical data sheetdesign features zero leakagebi, Directional, Metallic contact resilient no rubbing, Sealingtriple eccentric during valve strokeone piece shaft with blow, Out proof designadjustable shaft seal for low emissionquarter turn designlow torque therefore low cost of automationless weight / small spaceworm gear operatedinherently fire safe & antistaticminimal maintenancereplaceable seal ringcavities do not existrange 3 to 48 and larger sizespressure rating asme class 150 / 300 / 600 / 900temperature range, 1960 c to 8150 coptions live loaded shaft sealingextended bonnet for low temperature applicationcryogenic applicationhigh temperature applicationsteam jacketing