The Hytork XL series of pneumatic actuators combines quality, reliability and economy into a single actuated butterfly valve package. Suitable for On/Off and modulating applications the TTV/Hytork combination is assembled with Atex compliant components. As part of the Emerson portfolio (Hytork) we can also offer the Asco range of Pilot Solenoid Valves & TopWorx Valve Limit Switch Box, keeping all actuation components under the one brand. This includes Ex d, Ex-ia and Safe Area. All moving actuator parts are protected by a long lasting DURASTRIP lubrication which significantly reduces friction.