The Xover solenoid valve (photo) is designed to switch quickly and efficiently between samples, reagents, cleaning solutions or calibrants. The Xover valve features a Y-shaped elastomer tube in a three-way configuration, which results in a design that combines the flow…
Versafreeze ultra-freezers (photo) have been optimized for the extreme requirements of deep-freeze storage for vaccine producers, pharmaceutical service providers and research laboratories, ensuring the safe storage of temperature-sensitive vaccines, valuable medicines, chemical substances or biological samples. With a temperature range…
Niagara brand vibrating-screen exciters (photo) are offered in four models, each of which is adjustable to provide eight weight configurations, delivering a large static-moment range. These exciters come standard on all of this company’s exciter-driven XL-Class and L-Class vibrating screens,…
This company has upgraded its range of SSA actuators for small valves by adding new features for more energy-efficient and versatile hydronic-room applications. The updated SSA actuators now offer more flexibility due to their broad control possibilities — from analog…
This pictorial guide illustrates some of the common problems that can occur with polymeric and elastomeric materials that differ from those that occur with metallic seals and components Failures of polymer (plastic and elastomeric) parts and their consequences can be…
Thermal oxidizers are pollution-control units designed to prevent process-generated volatile organic compounds (VOCs) from entering the environment. Different technologies offer tradeoffs among initial cost, operating expense, complexity, emissions, fuel efficiency and destruction efficiency. This one-page reference provides information on selecting…
Waterhammer arises because of sudden changes in fluid flow, and can present significant problems in processes that involve flowing liquids. This article outlines these potential issues and offers guidance for handling the pressure changes arising from waterhammer Most large-scale processes…
New BC-2200 backward-inclined fans (photo) are designed for high-flow, high-pressure applications handling clean air and light particle-laden or moist-air gas streams in a variety of applications, including thermal oxidation, steelmaking, combustion air, ethanol production, petroleum refineries, dust or fume control,…
This column is based on “Acrylonitrile Butadiene Latex Production – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/nitrile-rubber-production-cost. Nitrile rubber (also known as NBR, acrylonitrile butadiene rubber, acrylonitrile butadiene latex, Buna-N) is a synthetic polymer…
This overview compares various sealing technologies, and points out advantages and disadvantages of applying different mechanical-sealing designs for caustic fluids Caustic applications in chemical plants can play havoc on the mechanical seals of rotating equipment. These applications can be difficult…