Seat valve SW4

pistonpneumatically-operatedfor chemical products

Extra wall thickness of valve housing reduces stress in the seat area Wear resistant elastomer/PTFE shaft seal and bearings increase seal lifetime Installation and maintenance convenience Profile seals with marking for easy identification Metallic stop provides for defined compression of seat seal Ball shaped housing prevents sump or dome, reducing CIP cleaning times Clamp closure provides for quick and easy valve maintenance Many different housing configurations 3-A approved All product-wetted parts are made of AISI 316 L / 1.4404 (DIN EN 100888) stainless steel. Seal materials are EPDM (standard), HNBR, FPM (options) Valve variants: With manual actuation (SW4 H) Divert valve (SWS4) Tank outlet version (SWT4) High-pressure design (SWhp4) With steam barrier (SW4 DPF) Long stroke version (SW4 long stroke) for highly viscous products or larger particles With modulating cone (SWR4) Tangential inlet / outlet ATEX compliant models 3-A version Single seat control valves are used in a variety of processing applications to shut-off and to change over processing lines. The operation to close or open the valve (by moving the valve stem) is performed by a pneumatic actuator with air connection and reset by spring force. The following designs are possible by way of different actuator assemblies: NC: Actuator normally closed / air-to-raise, spring-to-lower NO: Actuator normally open / air-to-lower, spring-to-raise