June 2011, Vol. 23, No.6


Polycarbonate enclosures

PolyStarTM polycarbonate enclosures are designed to withstand rain, sleet, snow, and splashing water, and provide impact and flame protection. The enclosures feature side-mount solutions to increase usable space, provide additional mounting options, and offer variable mounting heights. The enclosures feature multidirectional mounting feet, integrated lock hasp, and latches and hinges that do not penetrate enclosures. The enclosures, suitable for outdoor and indoor applications, feature product performance unaffected by temperatures as low as –40°F. Stahlin Non-Metallic Enclosures (Belding, Mich.).



The S651CD submersible electrode and S656CD insertion electrode are pH electrodes with flat surface designs to reduce coating and buildup in turbulent flows, suitable for use in many dirty applications for municipal and industrial water and wastewater treatment. The S651CD is designed for tanks, flumes, and sewer lines, in addition to other applications with high suspended solids where flocculation operations require low velocities and in tanks with high agitation. The S656CD is designed to take measurements in pressurized tanks and main lines without the need to shut down the system for electrode maintenance. Both electrodes feature a measurement range of zero to 14 pH and ±2000 mV for oxidation-reduction potential, and operate between 50ºF (10ºC) and 185ºF (85ºC), depending on the maximum pressure desired, which can be up to 80 lb/in.2. Sensorex (Garden Grove, Calif.).


Universal controller with ultrasonic flow sensor

The sc200™ universal controller with ultrasonic flow sensor is an open-channel flow-monitoring solution for applications that include stormwater, inlet flow, final effluent, and activated sludge. The system — designed to be accurate, easy to use, and flexible with its plug-and-play sensor setup and communication options — can be used alone, with a second ultrasonic flow sensor, or with a digital probe. The system includes a standard two 4–20-mA outputs and includes a capacity to increase to six. The controller may be panel-, surface-, or pole-mounted. The system’s display uses menu-driven programming to guide the user through setup, primary device selection, and calibration. Hach Co. (Loveland, Colo.).


Pressure-reducing valve

The series PRH-U pressure-reducing valve uses thermoplastic materials selected specifically for industries requiring high purity. The system uses a three-step cleaning process that includes a proprietary preassembly clean-room treatment, post-assembly hot and cold 8-hour rinse with deionized water, and final class 100 clean and double-bag procedure. The series features a nonrising stem to minimize installation height and a redesigned internal shaft with a smoother shape that helps maximize flow capacity. All external fasteners are nonwetted and capped to prevent atmospheric corrosion. Valves regulate downstream pressure from 10 to 125 lb/in.2, with maximum inlet pressure of 150 lb/in.2. Plast-O-Matic Valves Inc. (Cedar Grove, N.J.). 


The Quick4® Plus high-capacity chamber, designed for 36-in.-wide septic system installations, is built to offer increased stability and strength through its two center structural columns. The chamber includes a Contour Swivel Connection™ for advanced contouring capabilities for onsite septic system designs. The chamber supports wheel loads of 16,000 lb/axle, with 12 in. of cover and can be used with other Quick4 products to allow for a center feed with pipe connections as sides, ends, and top and to be installed in raised, invert installations with 180-degree directional inletting. Infiltrator Systems Inc. (Saybrook, Conn.).


Digital isolator

The ACT20X range of digital isolators consists of intrinsic safety signal conditioners designed for hazardous-area applications. The range includes two types of digital modules, pulse isolators designed to convert and isolate digital signals to and from hazardous areas, and actuator drivers designed to isolate and drive digital actuators and alarm devices in hazardous areas. Pulse isolators relay status and frequency signals from flow, pressure, or level switches, as well as proximity sensors for position or motor-speed measurements. The 22.5-mm-wide devices save space and feature an independent error-alarm output for monitoring input signals and internal electronics. A dedicated, volt-free contact registers open/short circuits or internal errors for quick problem identification. Weidmuller (Richmond, Va.).

Priming-assisted pumps

Prime Aire Plus™ priming-assisted pumps are designed to pump both clear liquids and liquids containing large solids and have the ability to fit other pumping installations. Designed to offer increased head and flow, pumps are available in up to 8-in. flanged discharge sizes, flows up to 4950 gal/min, and heads to 475 ft. Gorman-Rupp Co. (Mansfield, Ohio).


Continued thermal hydrolysis

The Exelys™ thermal hydrolysis process utilizes biosolids as energy resources for wastewater treatment plants to improve operations, achieve sustainable goals, and reduce carbon footprint. Designed to be the next applied-generation thermal hydrolysis process, the system operates continuously for optimal energy recovery. Exelys applied in a digestion–lysis–digestion configuration allows biogas for electrical generation to be further increased, improving a wastewater treatment plant’s energy efficiency. Kruger (Carey, N.C.).


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