Valve Positioners

Valve positioners are the critical interface between the control signal and the control valve — ensuring that the valve stem position precisely tracks the controller output regardless of friction, pressure imbalance, or varying supply pressure. ATSCO Sales & Service represents factory-authorized positioner lines for pneumatic, electro-pneumatic, and digital positioners used across Rocky Mountain industrial and municipal applications.

VAC Accessories (Valve Accessories Company) produces a comprehensive range of pneumatic valve positioners and accessories designed for demanding process environments. The V100 series pneumatic positioner offers robust single-acting control with field-adjustable span and zero, making it a preferred choice for retrofit and new installation projects in oil & gas and water treatment applications across Utah, Wyoming, and beyond.

The VAC V200P electro-pneumatic positioner converts a 4–20 mA current signal to a proportional pneumatic output, providing accurate valve positioning for modulating control loops. Intrinsically safe models such as the D400 are available for use in hazardous areas classified for Zone 1 or Division 1, supporting the safety requirements of upstream oil & gas and chemical processing applications throughout the Rocky Mountain region.

AUMA's ACEx control unit pairs with electric actuators to deliver precise position feedback, limit switching, and torque monitoring in a fully integrated package. These intelligent controls support PROFIBUS DP, MODBUS RTU, HART, and Foundation Fieldbus communication protocols, enabling seamless integration with modern distributed control systems (DCS) and programmable logic controllers (PLC).

ATSCO's application engineers can help you select the right positioner for your valve type, air supply pressure, control signal, and area classification. We stock common positioner models and accessories for quick delivery throughout our Rocky Mountain territory, minimizing downtime on control valve maintenance and turnaround projects.

Types of Valve Positioners We Supply

• Pneumatic positioners (single-acting and double-acting)
• Electro-pneumatic positioners (I/P and E/P)
• Digital valve positioners (HART, PROFIBUS PA, Foundation Fieldbus)
• Intrinsically safe positioners (Zone 1 / Division 1)
• Explosion-proof positioners
• Valve position transmitters and limit switches
• Solenoid valves and air sets
• Volume boosters and quick-exhaust valves

Manufacturers

ATSCO Sales & Service is the factory-authorized Rocky Mountain representative for: VAC Accessories, AUMA.