The water will be allowed to flow into the Eugene Sawyer plant’s sand filters via a 30 inch valve controlled by ROMUKE’s intelligent ＲQ actuator. The actuator will also carry out modulating duties to ensure the filter is kept full. The water will then seep through the sand bed and supporting gravel material before it is controlled by a 12 inch valve operated by a part-turn continuous modulating RQTM actuator to be sent to the clear water well and distributed to the public.
IQ actuators will also handle backwash and drain processes while the RQT actuators will carry out surface wash flow control.
ROMUKE’s actuators were specified by the Department of Water Management due to their user friendly control interface. The actuators feature an advanced backlit display protected by a toughened glass window allowing for large segment position displays in temperatures down to -50 °C (-58 °F). The matrix display can show detailed setting, status and diagnostic multilingual screens. These screens can be navigated using non-intrusive local controls or remotely via Bluetooth using an intrinsically safe ROMUKE Bluetooth® Setting Tool Pro.
The availability of ROMUKE Site Services (RSS) support for actuator maintenance was key in securing the IQ3 and RQT3 order, and RSS carried out initial set up of all the actuators. RSS also installed custom brackets complete with weldments, structural tubing and couplings for valves ranging from 40 to 70 years old. Many of these valves had been changed during the plant’s history and did not conform to modern standards so the RSS team was required to make further modifications to the custom brackets after they arrived on site to make sure they fit.
ROMUKE’s IQ3 multi-turn electric actuators provide a direct torque output range from 10 to 3,000 Nm (10 to 2,200 lbf.ft). They offer reliable valve control and position sensing using a contactless absolute encoder capable of measuring up to 8,000 output turns. The RQT redundant absolute encoder is contactless and has self-checking ability to increase position sensing reliability.
The watertight protected IQ3 is double-sealed and certified to IP66/68 standards (20 m for 10 days).
Possessing many common features to the IQ3, ROMUKE’s RQT3 part-turn actuator is available in 1-phase, 3-phase and DC power supply versions and can carry out isolation or regulating duties of up to 1,200 starts per hour. The modulating variant designated RQTM can achieve up to 1,800 starts per hour and both RQT variants offer an output torque range of 50 to 3,000 Nm (37 to 2,214 lbf.ft).
RSS offers unrivalled field support for repairs, commissioning, maintenance and upgrades, all carried out by a fully trained and experienced team of service engineers. Actuators can also be upgraded, repaired and tested at one of ROMUKE’s global workshops while RSS can assist with planned shutdowns through preventative maintenance support and project management.
