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NOV-DEC 2017

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54 INTECH NOVEMBER/DECEMBER 2017 WWW.ISA.ORG Dosing valve The corrosion-resistant pneumatic diaphragm valve is suitable not only for highly corro- sive dosing applications, but also for open/close applications. The type 604/605 pneu- matically actuated dosing valve is tested to surpass 2 million life cycles. In typical chemi- cal dosing applications, low-cost solenoid valves save money, but they corrode and break down, requiring frequent replacement. High-end, corrosion-resistant solenoid valves for the same application last longer, but are very expensive. The dosing valve has a lower price point, but is already corrosion resistant, and with minimal metal parts, it has a longer, more reliable life span. The ½-inch (d20) 604/605 valve is available in body materials PVC, CPVC, PROGEF standard PP, and SYGEF standard PVDF with a wide variety of end connections and custom assemblies. The valve is pressure rated at 90 psi unidirectional with operating temperatures ranging from –4°F to 284°F, depending on body material. The threaded bonnet eliminates the need for both metallic body bolts and retorquing after hot line shut downs. Oversized pneumatic ports decrease cycle time to maintain accurate dosing with minimal overrun. GF Piping Systems www.gfps.com Pneumatic rotary actuators The NITRA rotary actuators are available in four body sizes, with or without shock absorb- ers. All are double acting and have an adjustable travel range from 0 to 190 degrees. Anodized aluminum bodies include integral mounting slots for position switches, and a durable ball bearing hub and integrated piston magnets are standard. The compact rotary actuators are suitable for general material handling and other industrial applica- tions, such as conveying, clamping, transferring parts, positioning, and controlling valves. The pneumatic grippers are compressed air actuators with jaws (or fingers) to pick up, hold, and release objects. They are used in a broad range of general automation processes, such as pick and place, material transfer, clamping, and indexing. Two jaw parallel and two jaw angle grippers are available in seven body sizes and with side-mount or end-mount grips. Parallel grippers open and close parallel to the object, and angle (or angular) grippers open wider than parallel jaws, requiring more space. The pneumatic grippers are either double-acting, single-acting normally open, or single-acting normally closed. Anodized aluminum bodies include integral mounting slots for position switches. AutomationDirect www.automationdirect.com Relief valve leak monitoring The inline FLT93L flow switch is suitable for relief valve leak monitoring in natu- ral gas fractionation applications. It is a heavy-duty thermal dispersion flow, level, temperature switch. With an all-welded thermal sensing element, the FLT93L switch includes an advanced electronic control circuit, which is field configurable to satisfy any combination of application requirements. Unlike other flow switch technologies, the thermal sensor in this switch is suitable for both gases and hy drocarbon-based liquids. The switch's voltage output allows the user to "see" into the process and ac cu- rately set the desired trip point. The delta range between the switch's two resis- tance temperature detectors provides a span for setting the switch trip points. The plant technician can set these flexible dual relays for any combination of flow, level, or temperature alarms. The switch has a standard flow ac- curacy of ± 2% of the set point veloc- ity over a ± 50°F (± 28°C) temperature range. Its repeatability of ± 0.5% reading is satisfactory for dependable operation in natural gas fractionation relief valve leak monitoring. All FLT93 series switches are temperature compensated for accu - racy under rugged petrochemical plant operating conditions. FCI www.fluidcomponents.com product spotlight | Final Control Elements

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