Magmeters with PECS.

PEX liners deliver durable, abrasion-resistant performance across flow meter portfolio, without PFAS-related compliance issues or added costs.

The release of PEX liners for the Rosemount™ 8750W Magnetic Flow Meter has been announced by Emerson. The Rosemount 8705 Flanged Magnetic Flow Meter and Rosemount MS Magnetic Flow Meter sensors are designed for water/wastewater and other slurry or abrasive applications. The new PEX liner gives users a longer lasting, PFAS‑free and more cost-effective flow meter solution that simplifies stocking and compliance while improving reliability in chemically aggressive conditions.

Existing liner solutions have relatively poor wear resistance to both chemical attack and abrasive slurries, emitting harmful chemicals as they wear. These solutions are also expensive to purchase and maintain, with liner flaring often occurring if meters are not installed promptly or removed temporarily and then reinstalled. Existing solutions also present stocking and inventory challenges because different applications require different liner types, an issue compounded by their relatively high cost.

To address these issues, Rosemount magnetic flow meters now provide a PEX liner option that is not available from other suppliers. This exclusivity enables end users to address per- and polyfluoroalkyl substances (PFAS) concerns and durability challenges, without changing measurement technology or suppliers.

PEX liners formulated without PFAS help end users respond to increasing regulatory, environmental and public scrutiny, while maintaining liner performance. This simplifies material selection and stocking compared to fluoropolymer-based liners, as the latter can differ in materials of construction, depending on the application.

The PEX liners’ crosslinked molecular structure delivers high abrasion resistance, making it suitable for wastewater, slurries and other applications with entrained solids where liner wear can reduce product life. Even with all these advantages, PEX liners are typically less expensive than alternative solutions. PEX liners are available now for line sizes up to 8 inches, with liners for larger line sizes under development.

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Valve for heavy slurry service.

Emerson’s Clarkson™ KS1 Knife Gate Valve is a true bi-directional, full bore, ASME Class 150 valve designed for the rigours of heavy slurry service. Its advanced, patented sealing system delivers zero-leakage isolation for longer, enabling increased run time and throughput.

The new Clarkson KS1 Knife Gate Valve, designed to help mine, oil sands and pulp & paper operators achieve increased availability of their most challenging slurry processes has been announced by Emerson.

“The Clarkson KS1 is a compelling innovation for operators of heavy slurry processes, such as tailings lines,” explained Mike Gordon, director of Emerson’s knife gate valve business. “This valve is purpose-built for extended zero leakage isolation in these tough environments, so these processes run uninterrupted for longer to improve throughput and minimise valve maintenance costs.”

The new knife gate valve features a patented gate edge seal design that creates a continuous seal around the gate, together with a precision-moulded elastomer seat. This heavy-duty seat increases the contact area and resilient sealing ability of the valve compared to standard O-ring designs, resulting in superior isolation performance over an extended lifecycle.

The valve design has been optimised to thrive in heavy slurry conditions with a full round port that eliminates protrusions into the flow, which minimises turbulence across the valve and reduces wear on valve components and downstream equipment. Reversible, rotatable wear rings also come standard on both sides of the valve to protect the seat and extend maintenance intervals.

Maintenance teams were also top of mind during the design of the KS1. The valve is repairable with standard tools and readily available spare parts. Adjustments can be made to the packing system externally that dynamically self-adjust pressure to the gate edge seal system. The KS1 is also designed to standard MSS SP-135 face-to-face dimensions for simple changeout and upgrade of underperforming installed valves.

The Clarkson KS1 comes built tough for the rigours of severe slurry service in sizes 2” through 30” with a variety of available flange patterns, an ASME Class 150 pressure rating of 290 psi (20 bar) at ambient temperature and a temperature rating up to 300°F (149°C). Alternate materials are also available to combat extraordinary abrasive and corrosive process conditions and a variety of automation options can be configured to suit.

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New applications for radar level transmitter

Siemens has launched the Sitrans LR250 radar level transmitter with a new threaded PVDF (polyvinylidene fluoride) antenna for liquid and slurry measurement. The antenna opens up new applications in extreme conditions for this non-contacting level transmitter.

The Sitrans LR250 threaded PVDF antenna is designed for extreme conditions characteristic of acids, alkalis, and other corrosive chemicals: some examples include sodium hypochlorite, sodium hydroxide, and sulfuric and hydrochloric acid applications. These applications are not suitable for stainless steel and usually require transmitters be made from exotic and costly materials. However, it is able to withstand such environments while remaining a cost-effective solution. It also uses FDA-compliant materials suitable for use in food and beverage, chemical, and water treatment applications.

The unit is a compact 25 GHz 2-wire transmitter for non-contacting level measurement of liquid or slurry materials for measurement ranges of up to 20 m (66 ft). It is available with Hart, Profibus PA, or Foundation Fieldbus protocols. With the graphical Quick Start Wizard the Sitrans LR250 is operational in minutes and the infrared handheld programmer supports local programming. Full function diagnostics comply with Namur NE 43 and the Sitrans LR250 has also achieved a SIL 2 functional safety declaration with Safe Failure Fraction (SFF) of 86%, making it suitable for use in Safety Instrumented Systems (SIS). Key fields of application for the Sitrans LR250 include bulk liquid storage tanks, process vessels with agitators, vaporous liquids and low dielectric media.