Warren Controls’ ARIA valve series aims to replace pneumatic actuation with electric14 February 2022

Warren Controls, a US manufacturer of control valves and specialty fluid handling products, has launched the ARIA Series of electrically-actuated, modulating globe control valves. It entered into a research and development initiative spanning several years specifically to resolve issues faced by the steam-fired instantaneous water heater markets.

The valves are intended to replace pneumatically-actuated versions, including management oversight, lags in fluctuation response time and sensitivity to environmental factors including shock forces that can occur from water hammer and piping systems.

The valves are described as being ideally suited to challenging, modulating, industrial processes that require electric actuation with the actuation speed and reliability of pneumatics. The new ARIA series is an upgraded version of Warren Controls’ AmurAct. The newly improved actuator is designed for 1.5 million cycles and can withstand ambient temperatures up to 65°C, with travel speeds at 12 seconds per inch (nine seconds for ¾-inch stroke valves). ARIA is equipped with an electric spring fail safe (when opened or closed), robust enclosures with IP67 / NEMA 4X enclosure and water tight ½” NPT fittings, and has split range input capability for 1/3-2/3 high/low applications.

The ARIA series offers features including galvanically-isolated control and feedback, the ability to split-range for Hi/Lo applications; and push-button manual commissioning. The series is designed for 1.5 million cycles, and includes all common control and feedback systems. Four valve series are available with the ARIA actuator for customized use: the ARA is a three-way cast flanged steel valve for 1/2” – 2”; the ARB is a two-way or three-way threaded bronze or stainless steel valve for 1/2” - 2”; The ARC is a two-way or three-way flanged cast iron valve for 2-1/2” - 6”; and the ARD is a two-way flanged steel cage valve for 1/2” – 2.”

The ARIA electric actuator has a NEMA 4x rating with a capability of withstanding ambient temperatures up to 65°C. It has an internal feedback mechanism for the linear stroke of 12 bits or 4,000 parts of resolution. Features like galvanic isolation between the inputs and the outputs means user systems don't end up with ground-loop problems when connecting to PLCs (programmable logic controllers) and other central control systems.

Going with a high-resolution electric actuator means the controlled flow is adjusted very tightly to the flow requirement, unlike an HVAC actuator. HVAC actuators might only have 100 parts of resolution for full valve stroke, so it moves in 1 percent increments, whereas high-resolution electric actuators move in a tenth of a percent increments.

Operations Engineer

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