Process Control Functionality
Tritex II actuators, available in both rotary and linear versions, provide a perfect solution for your valve actuation needs. Small hysteresis and dead band, quick response to small signal changes and stable dynamic responses delivered by Tritex II actuators are all key parameters for process control.
Fully programmable to follow an analog signal representing either position or force, the Tritex II linear actuator is perfectly designed for sliding stem valve applications with thrust requirements up to 3685 lbs. Highly accurate position feedback allows the Tritex II to achieve combined repeatability and hysteresis as low as 0.25%.
The Tritex II Rotary actuators are ideal for operating quarter-turn, full-turn, or multi-turn valves or shaft driven dampers. In shaft driven applications, the rotary Tritex II actuators are directly coupled shaft-to-shaft. This eliminates the ungainly mechanisms usually necessary to convert the linear motion of pneumatic and hydraulic cylinders to rotational motion. Gear ratios of 4:1 to 100:1 allow the power of Tritex II to be applied to a broad range of applications.
Tritex II actuators can be mounted on any valve from any manufacturer.
Benefits for Process Control Applications
100% Torque Availability
Full Torque means almost zero deadband, and stiction in the valve stem is no problem. Current is always available so it will hold its poition. This provides excellent process loop control.
Speed of Response
Tritex II response rate is measured in milliseconds. This provides excellent modulating control of both ball valves and butterfly valves.
High Accuracy
Tritex II actuators have a built-in position feedback sensor, providing much higher accuracy over potentiometer-based actuators.
Custom Valve Seat
Exlar linear actuators stroke the valve based on position, but can switch to torque mode when seating the valve. This allows a tight cut-off. It also helps with retrofitting valves that may have some wear. For new valves, it makes sure damage isn’t done due to over-forcing the stroke.
High Stiffness
Similar to hydraulic actuators, but without the cost or maintenance issues, Tritex II actuators are extremely stiff. This allows control down to the smallest operating range (<1%) and also eliminates dynamic flow problems such as negative gradients.
Fast Stroke Speeds
Most other electric actuators are known for being slow - a major disadvantage. Tritex actuators can close a valve in milliseconds if needed.
Improved Control
Under modulating conditions, Tritex II actuators provide precise closed loop tracking by effectively eliminating non-linearities and deadtime.
Valve Software
Our valve software is simple to use, featuring a teach mode for foolproof configuration. Included is a programmable valve cut off position feature that enables a firm valve seat on both new valves, or retrofitted valves.
