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DV84 Series

Product Description

DV84 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) or butt weld connections Springless internals Designed for very low particle generation 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 250 psig(17 barg): Pneumatic actuation 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=0.17 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) 10-15µin. Optional Ra (EP) 7µin(Electropolished) Internal Volume 0.8 cc   *   Standard Material **  Vespel® seat is recommended for Nitrous Oxide(N2O) service but is not available for low pressure pneumatic actuation.

Dimensions

Pneumatic Actuator (HP) Pneumatic Actuator (LP)  Note: All dimensions are reference Manual            Face Seal Male Fittings                        Face Seal Swivel Male Fittings            Tube Weld Stub Note: All dimensions are reference

Ordering Information

Body Series Actuator Work Pressure Inlet/ Outlet Connections Seat Option SL -DV84 M L - VM4 - VM8 - K E SL:316L   M: Manual (Handwheel) H: High pressure   K: PCTFE None: 15-20 µin.     P: Pneumatic actuator L: Low pressure   V: Vespel® E: 7 µin.

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 weld 4:1/4”, 6:3/8”, 8:1/2”

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