vent check valve Articles

  • Process Gass Venting

    Background:This Pfizer facility in Loughbeg manufactures proprietary active ingredients for strong prescription drugs which are then shipped to other facilities, predominantly Lipitor, for finishing. Remaining capacity is allocated to cancer drug manufacture. Most processes in the facility utilize a glass lined reactor vessel to produce large volumes of solvents such as ethyl chloride, acetone, ...


    By FAB-TECH Incorporated

  • Top 8 things to check when maintaining a Pressure Reducing Valve

    Like every other piece of mechanical equipment we use, a control valve does require some maintenance. As budgets are stretched and time is tight, it can be tempting to ignore checking on valves that are often located in underground vaults and give years of operation without complaint, but eventually like everything else, they will fail. This article looks at 8 simple steps that if undertaken ...


    By Singer Valve Inc.

  • Effective Groundwater Monitoring Using Dedicated Pumping Tubes

    This article describes a groundwater monitoring procedure that does not require decontamination of pumping equipment, eliminates the chance of cross contamination between wells, and uses a surface pump.  Two surface pumps are described, one for water level depths less than 25 feet and one for water level depths greater than 25 feet. Install Dedicated Pumping Tubes ...


    By RotaPump, Inc

  • Wind-driven SVE system extracts VOCs from landfill

    An innovative soil vapor extraction (SVE) system has operated at the former Ferdula Landfill site in Frankfort, NY, for the past 10 years. The system relies on wind-driven vacuum processes rather than electrically powered air blowers to extract volatile organic compounds (VOCs) from the landfill. After a two-year trial beginning in 1998, the New York State Department of Environmental Conservation ...

  • Achieving

    Introduction The leak repair requirements, under Title VI Section 608 of the Clean Air Act Amendments of 1990, require that when an owner or operator of an appliance that normally contains a refrigerant charge of more than 50 pounds discovers that refrigerant is leaking at a rate that would exceed the applicable trigger rate during a 12-month period, the owner or operator must take corrective ...


  • Chemical Industry: Compliance problems solved by Ethylene Oxide Scrubber at Specialty Gas Plant Chemical Industry The ethylene glycol produced in the ethylene oxide scrubbing operation acts as an antifreeze to allow year-round operation

    Problem: A specialty gas producer was confronted with an EPA compliance problem in dealing with ethylene oxide (EtO). The chemical had been added to the toxicity lists of the U.S. EPA and the Occupational Safety and Health Administration (OSHA). Effective August 21, 1984, the OSHA standard for EtO limited exposure to a 1 ppm, eight-hour time weighted average. Ethylene ...


    By CR Clean Air Group, LLC

  • CIRAS-2 User Recalibration of CO2 and H2O

    The CIRAS-2 CO2/H2O analyzer is an inherently stable instrument and does NOT require frequent calibration. The AutoZero function corrects for nearly all changes that result in calibration drifts. The most common causes of drifts in CIRAS-2 readings are i) incorrect Zeros due to exhausted chemicals or ii) leaks on the desiccant columns from rolled or damaged o-rings and iii) incorrect Diff Bal, ...


    By PP Systems

  • Medical Industry: Compliance Problems Solved by Ethylene Oxide Scrubber at Specialty Gas Plant Case Study

    The ethylene glycol produced in the ethylene oxide scrubbing operation acts as an antifreeze to allow year-round operation. Problem: A specialty gas producer was confronted with an EPA compliance problem in dealing with ethylene oxide (EtO). The chemical had been added to the toxicity lists of the U.S. EPA and the Occupational Safety and Health Administration ...


    By CR Clean Air Group, LLC

  • Case study - RTOs leave nothing to HAP-penstance

    PROBLEM The United States EPA promulgated a ruling in 40 CFR, imposing strict new standards to reduce emissions of toxic air pollutants from the manufacture of pharmaceutical products, including prescription and over-the-counter drugs. The agency's rule was intended to reduce emissions of a number of air toxins and hazardous air pollutants (HAPs), including methylene chloride, ...

  • Compressed Gas Safety Guide

    Use and storage of any compressed gas under high pressure can be extremely dangerous if proper gas handling procedures are not observed. Moreover, chemical characteristics of specialty gases themselves can pose serious health hazards if containment is not tightly controlled. Paying close attention to a compressed gas product’s technical and safety information is invaluable for maintaining a safe, ...

  • Weigh batching: the benefits of an automated system

    In many plants that batch-blend bulk products, weigh batching is a manual, time-consuming operation in which ingredients are weighed individually before being charged to a blender or other process vessel. A significant number of such plants could benefit from the installation of an automated weigh batching system. For small as well as large operations, an automated weigh batching system can pay ...


    By Flexicon Corporation

  • On the Ground with Diesel Corrosion - Case Study

    When the EPA revealed the results of its study in July on the increasing presence of substantial corrosion in diesel fuel tanks, it proved that the problem is much larger than anyone anticipated. The facts are staggering: 83%of the diesel tank systems exhibited moderate-to-severe corrosion. 75%of the owner/operators of those diesel tanks had no idea it was ...


    By Tanknology Inc.

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