Smooth Operators   Water & Wastes Digest August 2003
Lonnie White, instrument specialist at the Duck Creek Wastewater Treatment Plant, contacted The Eads Company when it came time to upgrade the automation of a number of existing 10-in., high-performance butterfly valves. After reviewing products eligible for the upgrade, White elected to use the Bettis EM800 quarter-turn, 110-volt AC electric actuator manufactured by Emerson Process Management of St. Louis, Mo.

Focus On Troubleshooting Water Softeners   Water Quality Products March 2003
Water Quality Products went in search of an expert to bring you the top troubleshooting tips for valves. The search led to Jay Runkle, employed in technical services at Pentair Water Treatment. According to Runkle, issues quickly can be sorted out if you know what to look for. Here are Runkle?s top 10 dilemmas, accompanied by probable causes and suggested antidotes.
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New Valves Maintain Piping System Integrity at High Temperatures, Provide Increased Chemical Reaction Time   Water & Wastes Digest March 2003
PVDF (polyvinylidene fluoride), a flouroplastic, is the material of choice for high purity water and chemical applications due to its excellent purity, temperature, surface and strength characteristics. The material expands as the temperature increases. George Fischer, Inc. designed the first SYGEF® PVDF High Temperature Resistant (HTR) diaphragm valve; it incorporates secondary sealing components manufactured from high purity TFM within the valve body to absorb the different expansion characteristics of the valve materials.

A New Option in Valve Actuators Strengthens Control of Filtering Operations   Water Engineering & Management January 2003
Water works engineers are now turning to a new generation of pneumatic valve actuators that are capable of executing the instructions of electronic control systems with the necessary precision to accurately control effluent flow. Surprisingly simple but rugged in construction, this new breed of actuators also is meeting the need to reduce downtime, as some of the first ones to debut in 1981 are still in operation without needing a spare (new) part.
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The Five Most Common Mistakes When Specifying Valves   Water & Wastes Digest October 2002   Andy Ryan
Some mistakes are the result of a malfunctioning valve ... or so it seems. In reality, the valve probably functioned as it was intended, but was specified improperly. No other component exerts as much control over a piping system -- yet so little time is spent specifying and understanding the humble valve. With a little effort and a few simple questions, you can avoid a lot of the heartaches, such as the top five mistakes.

Pinch Valve with Sealed Body Prevents Debris Buildup   Water & Wastes Digest August 2002
A problem existed in Pennsylvania at the Upper Gwynedd Towamencin County Authority wastewater treatment plant, in the secondary treatment phase. The submerged plug valves in the aeration tanks were becoming progressively harder to operate as the years passed.

Understanding High-Flow Valves   Water Quality Products July 2002   Dave Averbeck, Pentair Water Treatment
Recent trends in home construction and strict interpretation of plumbing codes are forcing the water conditioning industry to offer systems with higher flow ratings. While the need for higher flow rates in larger homes is genuine, the actual flow rates that are encountered are likely to be less than those predicted using the traditional fixture count method to calculate flows. The system manufacturer needs to carefully consider all components used to assemble the system when designing a water conditioner to meet a specific flow requirement.
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Solenoid Valve Selection   Water & Wastes Digest March 2002
Effective wherever fluid flow has to be controlled automatically, solenoid valves are being used to an increasing degree in the most varied types of plants and equipment. The wide variety of different designs available enables each user to select a valve to specifically suit the application in question.

Editorial Emphasis: Valves   Water & Wastes Digest October 2001
New Spring-loaded Check Valve Reduces Valve Failure Risk

Products In Action: Sludge Equipment #2   Water & Wastes Digest September 2001   Red Valve
Pinch Valves Control Flow at Georgia Solids Treatment Process Plant

Editorial Emphasis: Instrumentation   Water & Wastes Digest August 2001   Burkert
Connection of Sensors to Valves Is Chemical Plant’s Formula for Total Quality

Products In Action: Valves   Water & Wastes Digest August 2001   Jay R. Smith Mfg Co.
When one municipality needed to protect commercial and residential property from back flow in the sanitary sewer line they used the Flood-Gate Automatic Backwater Valve 7140, from Jay R. Smith Mfg. Company located in Montgomery, Alabama.

Choosing a Bellow Seal Valve to Stop Leakage   Water & Wastes Digest October 2000   Satish Chidrawar
Today’s chemical process industry is gearing itself towards safe technology for better environment. With increasing safety awareness in the industry and in the society, it has become every process engineer’s responsibility to design a plant with minimum damage to the environment. The goal is to minimize the wastage of materials and energy due to leakages in the plant.

Backflow Preventer Assemblies Help Nevada City Save Time, Costs   Water & Wastes Digest August 2000
Conbraco Industries, Inc.'s 4S Series double-check detector backflow preventer assembly, with its short lay length and ease of installation, solved the problem of corroding and obsolete valves for the city of North Las Vegas.

New Ductile Iron Check Valve Stops Water Hammer In Louisiana Municipality   Water & Wastes Digest August 2000
After suffering years of water hammer problems and the resulting effect on maintenance personnel and equipment, the St. Charles Parish Municipality in Louisiana needed a product that would save them both time and money. Milliken Valve Company of Bethlehem, Pa., provided the answer.