Valve Actuators, Positioners, Controls, & Accessories

Tri-State Technical Sales has been helping customers with measurement and process instrumentation since 1957 and continues to provide clients with innovative and cost effective solutions that solve difficult process control challenges. Tri-State is committed to providing the highest quality products, service and training.

Electric Actuators

• Quarter-turn and Rotary motors in AC (single and three phase) and DC voltages.
• Torques ranging from 80 to 250,000 inch-pounds.
• Nema 4, 4x, 7 and 9 enclosures.
• Manual overrides with handwheels.
• On/Off and Modulating applications.
• Optional electric-servo positioners for precise control.
• Various limit switch arrangements available.
• Fail-safe designs.

Pneumatic Actuators

• Quarter-turn and Linear motions.
• Types include Rack & Pinion, Scotch Yoke, Diaphragm and Linear Cylinder.
• Double acting (air to air) and Spring Return (fail close or fail open).
• Torques ranging from 30 to 400,000 inch-pounds.
• Optional manual gear overrides and lock-outs.
• Wide range of options including Solenoid Valves, Limit Switches, Pneumatic and Electro-pneumatic Positioners.

Positioners & Limit Switches

• Modular positioning systems for actuators and cylinders utilizing pneumatic or electric input signals.
• Rotary and Linear position indication devices with a variety of mounting options and internal switch configurations. Available with visual position indicators.

Pneumatic/Electro-Pneumatic Controls & Transducers

• Pressure Regulators with a wide selection of ranges & capacities, providing sensitivity, accuracy, low output drop, & immunity to pressure variations.
• Volume Boosters featuring high capacity, fast response & stability, wide ranges of signal to output ratios, pipe sizes & flow capacities.
• I/P, E/P, D/P, P/I Transducers with extensive combinations of inputs & outputs, such as: analog current or voltage, 8-Bit parallel digital, standard output 3-15 psig.
• Pneumatic Relays for positive biasing, positive/negative biasing, reversing, averaging, and computing.
• Full line of pneumatic Filters and Lubricators to keep your air supply running clean.

Valve Communications

• Tri-State provides a a full range of monitoring, communication and control products ideally suited for quarter-turn and linear valve applications. Products include integrating position sensing, switching, diagnostics, and/or communication and control. Protocols include AS-i, Fieldbus, DeviceNet, and Profibus DP.

Mounting Hardware

• Tri-State designs and manufactures our own mounting hardware for use with the automated valve assemblies built in our shop. This gives us the ability to respond quickly to customers needs and the capability of automating any valve with any actuator.