DV82系列膜片阀 DV82 Series Diaphragm Valve Suitable for high purity applications 316L Stainless Steel enhances weldability and resistance to corrosion Both manual and pneumatic actuation are available Face seal fittings (FSR), compression tube fittings or butt weld connections Internal spring Metal-to-metal diaphragm seals High-cycle life 100% Helium-leak tested Materials of Construction Wetted Body 316L stainless steel Seat PCTFE*, Vespel®** Diaphragm Elgiloy® Non-wetted Nut 316 stainless steel Knob ABS Operating Conditions Maximum operating pressure: 3500 psig(240 barg): Pneumatic and manual actuation Minimum operating pressure: vacuum Temperature -40°F to 150°F (-40°C to 65 °C) Pneumatic Actuator:   Operating Pressure 70-125psig Inlet Connection 1/8" NPT(Female) Normally Closed Functional Performance Flow Capacity Cv=0.16 Maximum Leak Rate:   Inboard Leakage 1 x 10-9 atm cc/sec He Outboard Leakage 1 x 10-9 atm cc/sec He Across Seat Leakage 4 x 10-9 atm cc/sec He Proof Pressure 150% of maximum rated pressure Burst Pressure 400% of maximum rated pressure Surface Finish Standard Ra (BA) 15-20µin. Internal Volume 0.8 cc   *   Standard Material ** Vespel® seat is recommended for Nitrous Oxide (N2O) service . Dimensions                   Manual              Pneumatic Actuator (HP) Note: All dimensions are reference Face Seal Male Fittings Face Seal Male Fittings         Tube Weld Stub Compression Tube Fittings Note: All dimensions are reference   Ordering Information Body Series Actuator Work Pressure Inlet/ Outlet Connections Seat Option SL -DV82 M H - VM4 - VM8 - K / SL:316L   M: Manual (Handwheel) H: High pressure   K: PCTFE None: 15-20 µin.     P: Pneumatic actuator     V: Vespel®     Inlet/Outlet Connections Type Size VM: Face seal male (FSR fittings) 4:1/4”, 8:1/2” VSM: Face seal swivel male (FSR fittings) 4:1/4”, 8:1/2” VSF: Face seal swivel female (FSR fittings) 4:1/4”, 8:1/2” TF: Tube fittings 4:1/4”, 6:3/8”, 8:1/2” TW: Tube Weld 4:1/4”, 8:1/2”