Rotork Fairchild Type 21 pneumatic relay and Masoneilan SVI1000 series pneumatic positioner, SVI1000/G, 4-20mA/HART communication digital valve positioner.

The device offers exceptional positioning accuracy within ±0.1% of the full scale. Additionally, it maintains hysteresis and deadband values at or below ±0.3%, guaranteeing stable and reliable flow regulation throughout its operation.

It supports the HART communication protocol, with optional versions 5 and 7 available. This compatibility ensures seamless integration with DCS and PLC systems, allowing users to remotely configure parameters, access diagnostic data, and perform firmware updates using the ValVue software platform.

The product features a modular design that enables quick replacement of key components, such as circuit boards and sensors. This approach effectively reduces maintenance costs and downtime. Furthermore, the inclusion of a "one-touch tuning" feature facilitates rapid adjustments for enhanced operational efficiency.

Designed to withstand harsh industrial environments, the device has an IP66/NEMA 4X protection rating. It operates reliably within a wide temperature range of -40°C to +85°C and tolerates humidity levels from 10% to 95% RH, provided there is no condensation.

The product is certified by renowned safety standards including ATEX, IECEx, FM, and CSA. It supports explosion-proof designs (Ex d IIC T6) as well as intrinsically safe configurations (Ex ia IIC T4), making it suitable for use in hazardous environments requiring stringent safety measures.

Certain models, such as the SVi1000/PR/G/IM, come equipped with integrated pressure gauges. These gauges provide direct readings of input and output air pressure, simplifying the process of field commissioning and enhancing user convenience.

In the petrochemical sector, these systems are applied in refinery reactors and natural gas pipelines. They enable accurate flow control of high-temperature and high-pressure substances such as crude oil and steam, even in hazardous environments. This precise regulation ensures safety and efficiency during processing.

Within the power and energy industry, these devices manage valve operations in steam turbines, condensers, and boiler systems. Their ability to function effectively under conditions of high temperature and vibrations contributes significantly to enhancing overall power generation efficiency.

They play a vital role in controlling large-diameter valves used in municipal water supply networks and wastewater treatment facilities. By optimizing water flow and the dosing of chemicals, they help maintain the quality and safety of water treatment processes.

Designed to meet strict hygienic standards, these valve control systems are suitable for sterile applications in cleanroom environments. They ensure that production remains safe and contaminant-free, adhering to stringent cleanliness requirements in pharmaceutical and food processing industries.

In metallurgy, these systems provide precise control over atmosphere regulation and fluid transfer during smelting operations. Their capability to operate continuously under extreme temperatures and pressures supports efficient and uninterrupted metallurgical processes.