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  • Respiratory PPE for Wet Well Applications
    Wet well sites are generally thought of as sewers, pump stations and waste water holding. tanks, but also include water fountain control valve pits, septic tanks, ewage digesters, and. water tower interiors. Many wet well scenarios are defined as confined space, despite that. some are open
  • MICRO:Top 40 - Page 2 (Nov '00)
    A high-flow 3-in. NPT relief valve for corrosive and ultrapure liquids also serves as a back-pressure regulator and bypass valve. The Series RVTX angle-pattern valve is made of Grade 1, Type 1 PVC and comes with a choice of Viton or EPDM elastomeric seal. It can be customized or made of other
  • Typical Characteristic of Gassing on VRLA Batteries - Dynasty Example
    of hydrogen is of concern since a 4% mixture of hydrogen in air is an explosive mixture when ignited. For this reason it is recommended that no more than a 2% level be allowed to accumulate. The valve regulated lead acid (VRLA) battery is unique in that is incorporates an oxygen recombination cycle
  • Battery Failure Prediction (.pdf)
    The weak link in a standby battery-based emergency system is the battery. The batteries referred to here are either flooded (wet) cell type, or the valve-regulated type (VRLA). These batteries are typically used to power UPS systems, switchgear, oil pumps, telephone central office, outside plant
  • MICRO: Critical Materials?Chemicals
    condition in a 20-wafer-per-hour process can cause an IC manufacturer processing wafers valued at $2500 each to lose $1,200,000 per day in revenues. Abnormal flow conditions can have a variety of causes, including pump, filter, and valve or valve control issues; facilities difficulties; or human
    . Teknor Color Co., 505 Central Ave., Pawtucket, RI 02861, (401) 725-8000. The mother-of-pearl brilliance imparted by TekPEARLite concentrates is generated without the use of heavy metals. They are available in red, gold, blue, green, orange, and violet. New Teflon extends valve life Conventionally
  • Energy-stingy coolers
    by a Linux-based controller correlates instantaneous water-evaporation and water-application rates to deliver the proper amount. ), communicates with Opto 22 I/O modules to implement cooling strategies. Besides reading I/Os, aggregating data, and controlling the valve that wets the media, the controls
  • Interphex Preview, Part Deux
    This quick, one-time registration gives you access to members-only site benefits. Industrial Vacuum Cleaners and HEPA/ULPA Filters offers industrial vacuum cleaners: intermittent duty, continuous duty, central systems, wet/dry, explosion-proof, air-operated, stainless steel, separators and hoppers
  • MICRO:Product Technology News (Oct. '98, p.110)
    and a pressure-relief valve. Clamped to the base with a large O-ring, the chamber has two quick-disconnect fittings for filling and purging. The chamber is made of low-outgassing transparent molded poly- urethane which blocks UV light at a rate of 2% below 250 nm. The filter in the nitrogen input line is rated

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