What is a Actuated Globe Valve?
A throttling globe valve uses a linear motion to move a closure member into and out of a seating surface. They have a body distinguished by a globular-shaped cavity around the port region and are designed to regulate process flow when used in conjunction with an actuator assembly. Many single-seated valve bodies use cage or retainer-style construction to retain the seat-ring, provide valve plug guiding, and provide a means for establishing particular valve flow characteristics. Cage or retainer-style single-seated valve bodies can also be easily modified by change of trim parts to change the flow characteristic or provide reduced-capacity flow, noise attenuation, or reduction or elimination of cavitation.
Overview of Globe Valve Actuator
Profinet as an open Industrial Ethernet communication standard is increasingly in demand especially in the water industry. Redundant Profinet in combination with AUMA electric actuators helps the Wupperverband achieve sustainable plant operation in its Marienheide wastewater treatment plant.
Marienheide wastewater treatment plant (WWTP), Germany, has experienced re- markably high plant availability since installing redundant Profinet systems to integrate field devices. The plant operator is the Wupperverband, a large German water authority that operates 11 wastewater treatment plants, 14 reservoirs, a sludge incineration plant, and numerous flood retention and rainwater catchment reservoirs. Marienheide WWTP was the first Wupperverband plant to be equipped with Profinet technology at field device level.
At Marienheide WWTP, the AUMA actuators are linked in a ring topology with built-in redundancy using Profinet’s Media Redundancy Protocol (MRP)
Increased safety and easier handling
Since autumn 2017, around 20 AUMA actuators have been operating in a Profinet network at Marienheide WWTP. AUMA’s certified Profinet interface provides direct Profinet integration without the need for gateways, and meets the latest Profinet specification V 2.3. The interface allows bandwidths up to 100 Mbit/s and supports Profinet’s built-in redundancy concept, the Media Redundancy Protocol (MRP). At Marienheide, the AUMA actuators are installed in a ring topology using MRP. They are connected to the DCS via an intelligent switch. To support MRP, the AUMA interface incorporates a switch function with two physically separate Ethernet ports that provide two distinct communication channels to the host controller. If one port fails, communication continues automatically via the second port. All actuators therefore remain accessible even if the communication path is interrupted at one point on the ring.
“We expect high communication reliability due to the consistent use of Profinet at both control system and field level”, explains Dirk Gengnagel, Group Leader Engineering and Organization in the Urban Water Management division of the Wupperverband.
“Data and commands can be directly exchanged without any conversion; and Profinet’s integral Redundant Profinet increases plant availability redundancy function provides additional safety for plant availability. Furthermore, we expect savings and reduced proneness to faults since we can eliminate one bus level and require less hardware.”
Intelligent networks and diagnostics
Using Profinet, important operating data such as temperatures and torque curves can thus be read from the actuator. This improves the chances of detecting potential issues at an early stage, allowing for condition-based predictive maintenance.
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